Simulations about 2D,3D VAWT & Pelton wheel dynamic mesh 6DOF Ansys Fluent

[@a29095811XD]

30:50 45:30 56:10 1:01:45 1:12:45 2D 圖檔處裡 1:16:19 2D Geometry 1:27:50 2D setup 51:45 output 1:31:29 Run 1:40:40 Just my notes,thank you so much! Helpful for my master's thesis.

[@haveanicetime]

You're welcome dear Kuei!

[@rushikeshbadgujar8091]

Bro 3:52, that's what I've been looking for. You finally cleared my confusion with Sliding mesh and Dynamic Mesh. It was extremely useful. Keep the videos coming. Subscribed.

[@rushikeshbadgujar8091]

Also furthermore, while post-processing I really want to know that how can we obtain other parameters. For example: Say VAWT. The airspeed is 10m/s. Is it possible to achieve the parameters like torque acting on the shaft, angular velocity of turbine due to airspeed? I guess once we obtain it is easy to get power generated.

[@haveanicetime]

@@rushikeshbadgujar8091 Hello dear Rushikesh, you should do a literature review at first because it seems that you do not have a background about the performance evaluation of turbines. The power coefficient is estimated based on the turbine angular velocity and its torque. Or the moment coefficient and the tip speed ratio. I showed how to monitor the angular velocity and you also can monitor the moment coefficient, then you can use the equations found in the literature and estimate the power coefficient. Danke!

[@sumitpatil6346]

This is best explanatory video on this topic.Very nice!! One suggestion- Prepare a separate playlist of all ANSYS videos as there are many off topic videos present on your channel.

[@haveanicetime]

Hello dear Sumit, you are very much welcome! Actually I have a CFD playlist has all the CFD videos I uploaded. You just did not search well. Danke!

[@sumitpatil6346]

@@haveanicetime my bad, got the playlist, Thanks!

[@haveanicetime]

@@sumitpatil6346 You're welcome!

[@farhanmungroo4529]

Video was really useful. But im doing my final year project on 2D VAWT simulation. can i use the 6dof for 2d?

[@haveanicetime]

I shoed everything I knowin the video. Thanks

[@johnjashiaehernandez4579]

THANK YOU SO MUCH FOR THIS TUTORIAL!!! IT SAVED MEEE

[@haveanicetime]

YOU'RE VERY MUCH WELCOME DEAR HERNANDEZ!

[@johnjashiaehernandez4579]

@@haveanicetime I would like to ask how can I get the RPS or maybe the power produced by this turbine?

[@haveanicetime]

@@johnjashiaehernandez4579 It is clear in the video!

[@nayanpandule9779]

Thank you sir! If possible please make on video cfd analysis of VAWT(savonius turbine). There is no video available on KZbin related to this topic. It will be really helpful for so many people.

[@haveanicetime]

Hello dear Nayan, You are welcome ! You can tell me here your problem and I can help you, we can work on it together. Vielen Dank !

[@sandippoudel5160]

@@haveanicetime Can you do the 3d simulation of the savonius turbine?

[@haveanicetime]

@@sandippoudel5160 It isthe same procedure that it is shown in my videos....

[@jamattos9957]

Very nice Video Buddy! Does ANSYS CFX posses dynamic mesh, sliding mesh, 6 DOF?? I was certain that CFX was a better option for turbomachinery simulations, but now I´m unsure lol.

[@haveanicetime]

Hello dear JA, you are very much welcome! CFX is used for turbomachinery that has fixed speed of rotation as a main characteristic of the machine. If the rotation of the rotor is not fixed and depends on the flow speed like some wind turbines, Fluent can be used for the dynamic mesh feature which I am not sure if it is available in CFX or not. But this is the main difference between the 2 programs, Fluent can be used to simulate any type of rotating machinery but CFX is used for fixed speed of rotation. Fluent is very powerful and has many options and turbulence models. Danke!

[@mohamedmosad2107]

If I will make verticle axis wind turbine simulation, what is the better methods to make mesh for dynamic mesh making tetra or hexa?

[@haveanicetime]

Hello dear Mohamed, the dynamic mesh has more than one method, smoothing, layering, and remeshing. In this video I used a simple way of simulating the turbine. Danke!

[@estercarolin5189]

HEY THANK YOU!!! You help me so much more! God bless you!

[@haveanicetime]

You're very much welcome dear Ester! Danke!

[@foxvincenzo5027]

i guess I'm kinda randomly asking but do anybody know a good website to watch newly released series online?

[@hankemory5883]

@Fox Vincenzo i use flixzone. Just google for it =)

[@marfree411]

Brilliant!! Thank you!! Can the same strategy be applied to a horizontal wind turbine?

[@haveanicetime]

Hello dear Marfree, you are very much welcome! Yes it can be done if it is simulated in 3D domain. Danke!

[@masirohatsune9375]

Hello, I want to monitor the pressure of surface of each blade. However, like your video shows, three blades are all named as" turbine ", I can't monitor the blade separately. Could you help me to solve this problem? Thanks.

[@haveanicetime]

Hello dear Lei, simply you can select only the edges that describe the airfoil and make a named selection and name it airfoil 1 and do that with each airfoil....Thanks

[@masirohatsune9375]

@@haveanicetime Thanks for your reply. You mean I can name the edge in Meshing or Geometry. I will select each airfoil using Six DOF in Dynamic Mesh Zones. I think the relative moving among three airfoils will happen, Should I select the "Relative Motion" bottom?

[@haveanicetime]

@@masirohatsune9375 You are welcome dear Lei, simply, open meshing, after following what I did, select the edge that describe the airfoil like what I did at 1:18:49 , the only difference from any other turbine I showed in other videos is here the airfoil seems to be not completed, this is because it is connected to the bar that is pinned at the origin. I wish you understand this point. This is a minor difference and I think it will not affect the results because this is what happens in the real life... Just do this without any further action and check out the monitor and tell me...Viel Erfolg!

[@masirohatsune9375]

@@haveanicetime thank you! I will try it. In my case, the airfoil is not connected by the bar, just three airfoils. I will tell you if I have some problems.

[@haveanicetime]

@@masirohatsune9375 Okay dear Lei, I wish it works..Viel Erfolg!

[@Abcdcba219]

Hi sir, i have problem in 6 dof for long time. Why fluent 14 can't show "create" for 6dof ? Please tell me the problem. Best regard. Thanks.

[@haveanicetime]

Hello dear Fiqih, I am not really sure. It may be due to the old version or due to something wrong in the procedure. Try to reset Fluent again and see and be sure of following the steps of the video one by one. If you still have the problem, it is recommended to get the new version of ANSYS. It is available on the attached link for free. Danke! www.ansys.com/academic/free-student-products

[@Abcdcba219]

@@haveanicetime Ok thanks sir

[@haveanicetime]

@@Abcdcba219 Bitte schön !

[@satyamshukla33]

Image i have three seperate blade domains which are rotating relative to the main domain. And If i want one blade domain to rotate at its own axis also based on 1DOF rotation and some spring constant, what will be the center of rotation for that blade? Will it keep changing as per the rotating domain if initially i have given the required rotation points.?

[@haveanicetime]

Hello dear, watch my video about the variable pitch VAWT. I showed using a code to let each blade have its own rotation. See if this is what you wanna do. Thanks

[@satyamshukla33]

@@haveanicetime that’s a different case, I have already watched it. I am considering the 1 dof rotation of the blade using 6DOF dynamic mesh. Is it possible to talk to you anyhow?

[@haveanicetime]

@@satyamshukla33 Hello, you can get the research article related to this type of simulations and see the methodology of it. What I know is what I showed in the videos. You can send me any related paper on mech.eng.ahmedmansour@ gmail.com Thanks

[@amitjain1491]

when i click on the setting below 6 dof there is no option of create/edit do i need to enable something?

[@haveanicetime]

Hello dear Amit, try to reset the setup and start it again. Be sure that FLUENT does not have any problem and you enabled the dynamic mesh. Also be sure you followed all the steps I shew. Danke!

[@amitjain1491]

@@haveanicetime Do I need to have a user defined function in inlet velocity and how can I check that fluent doesn't have a problem

[@haveanicetime]

Hello dear Amit, the UDF is only needed if the velocity is not constant like I said in the video. You check using the dynamic mesh in FLUENT by creating a new project using random geometry and see if the dynamic mesh tab will work or not. Danke!

[@jeancarlos0596]

Why the velocity in the outer domain is cero at @1:08:46?. Is it a mistake?

[@haveanicetime]

Hello, no, because the turbine rotates from 0 to the specific velocity, the contours at the early simulation time may look like thise not like the fixed wind speed where you can find high magnitudes at any time of simulation. Here, the dynamic mesh starts from 0 velocity until the maximum or depending on the formula you enter. However, make sure to run the simulation for long durations to capture the realisitc changes in the speed magnitude and validate the results against a reference. Thanks

[@jeancarlos0596]

@@haveanicetime Thank you a lot. But I did like 50 000 iterations with a time step of 0.01 s and I don't know why the outer domain doesn't show the countor of velocity

[@haveanicetime]

@@jeancarlos0596 I am not sure. Try to use the fixed wind speed not the dynamic mesh like my 1st video. If you get good results, try to trail the source of issue when you use the dynamic mesh. The dynamic mesh is not easy to simulate. Accordingly, start with the easy case then move to the 6dof and see what happens. Anyway I showed the general procedure and the ideas. However, you can change anything you dhave doubt about until you hit the target. The thumbnail I used for the video was generated from the simulation I run before recording. i remember Igott good results:) Thank you

[@thermophysix]

Why I can't find the properties of 6DOF such as the moment of inertia and axis of rotation, etc?

[@haveanicetime]

Hello, make sure of using the full licensed version (Academic or commercial) not the free sudent one. Thanks

[@thermophysix]

@haveanicetime Thanks

[@thermophysix]

@@haveanicetime You're right, I've just downloaded ANSYS 18.2 and found the 6DOF option. Appreciate your help!

[@haveanicetime]

@@thermophysix Glad to know this! Thank you!

[@msaisantoshpavankumar9749]

Hello sir!!! I have a small doubt on how to calculate the moment of inertia. Please let me know how you were able to extract the value of mass.

[@haveanicetime]

Hello dear Kumar, simply it is the mass of the real turbine. Danke!

[@msaisantoshpavankumar9749]

@@haveanicetime Hello sir!!!! But when I tried to evaluate the mass of the turbine in SOLIDWORKS i am getting a magnitude in thousands, but in every literature I go through they are getting values in ten power minus three. Is there a way to evaluate the mass properly. Like can you show the method or steps please.

[@haveanicetime]

Hello dear Kumar, actually we need the mass of the turbine which is in kg, I do not think it is difficult to estimate it from the real turbine, it is available in the specifications of the technical sheets. We get the mass from the manufacturer not from a calculation procedure. Danke!

[@msaisantoshpavankumar9749]

@@haveanicetime Thank you sir for all the tutorials. Please keep up the great job!!!!!!!

[@umitbeyazgul2963]

Hallo Ahmed; Ich bedanke mich bei dir für Ihre Hilfe. Ich hatte schon 2D model mit 6-dof method vervollstaendigt. Jedoch ist es etwas mit 3D Model mit 6DOF shief gegangen. Wenn ich dir meine Dateien versendet habe, kannst du mal überprüfen ob es etwas falsch ist oder nicht. Danke im Voraus!

[@haveanicetime]

Hallo sehr geehrter Ümit, bitte schön aber was genau ist das Problem? Danke!

[@umitbeyazgul2963]

@@haveanicetimefloat point exception error in 3d model wenn du willst kann ich dir meine Datei versenden

[@haveanicetime]

@ümit beyazgül Es stimmt etwas nicht mit den Randbedingungen oder dem Setup. Versuchen Sie das Modell erneut von Grund auf neu, um die Ursache des Problems zu finden. Vielen Dank

[@sitinurulaini8174]

Hi! I do simulation about water turbine in a pipe. I used 6dof function for this simulation. But when I run, it states that 6dof angular solver has not converged. Can I know what the problem about my simulation?

[@haveanicetime]

Hello dear Siti, you're welcome! As I showed, it is one of the complex simulations and it requires patience and try and error. Just follow the same steps using the same geomtry until you hit something. Then change anything. Danke!

[@syazwanifwat815]

Hi sir. I have a question. Can we just create drawing from solidworks? i dont know how to use autodesk.

[@haveanicetime]

Hello dear Syazwan, yes, the geometry can be generated using any CAD software but the steps shown in the Designmodeler starting from importing each CAD file are the same and cannot be changed. Danke!

[@syazwanifwat815]

@@haveanicetime thank you for that but i've install the autodesk...now my problem is sw cant open the xt file? do u know why?

[@haveanicetime]

@@syazwanifwat815 Hello dear Syazwan, yes, save the file as step and it will open. Danke!

[@handoyohan4824]

Hi, where can i get theory about ansys like your pdf ?

[@haveanicetime]

Hello dear Handoyo, they are available on Google search I guess till now. Search for ANSYS theory guide, ANSYS User guide, ANSYS UDF pdf. Danke!

[@handoyohan4824]

@@haveanicetime thank for your help

[@leightonparadis38]

Hello, I'm doing a dynamic mesh in 3D with 6DOF for an axial turbine. When I try to run the solution, I get the error: 6DOF element must have a positive mass. I double checked and I made sure that it indeed did have a mass. Any ideas of how to troubleshoot this? Thanks!

[@haveanicetime]

Hello dear Leighton, okay sir, just decrease the timestep and see what happens. Sometimes we get a message " Negative volume detected" and when we decrease the time step, it works. So, reset the setup and decrease the timestep to a noticeable value and tell me if it works or not. Vielen Dank !

[@aniketvilasbeldar3407]

@@haveanicetime It worked for me. Basically, I changed a few things around among this as well.

[@wildstalion6289]

@@aniketvilasbeldar3407 Hi, can you share what you exactly changed ?

[@aniketvilasbeldar3407]

@@wildstalion6289 I don't exactly remember. But, if you are having this error, check your mesh quality and decrease your time step.

[@andresleon1184]

Hi, I have This error : 6DOF object must have positive mass, but I didn't insert a negative mass or a negative inertial moment, Could you help me? Thanks :)

[@haveanicetime]

Hello dear Andres, I got this error before and I fixed it by resetting the setup, or restarting it..Try this because ANSYS sometimes gives fake errors...Tell me the progress please..Danke!

[@andresleon1184]

Thanks, but I still have the same problem, when I insert the moment of inertia, I have the next error : All of 2 interface zones have been paired. Error Object: (mass 0), In settings of 6DOF you only put the MOI, but you don't insert a mass, I think that in this procedure is the error, do you know fix this?

[@haveanicetime]

Hello dear Andres, I am not sure, I can send you the project to study it and do the same steps, you can contact with me by [e-mail] Thanks

[@sumitpatil6346]

can you please share video link in which you have told about meshing ??

[@haveanicetime]

Hello dear Sumit, watch my other videos about VAWT. Danke!

[@johanmejia2850]

Hi, i am doing a simulation to savonios turbine but i can't fin the video metioned about " how to choose INLET input values".... Tanks and great video!

[@haveanicetime]

Hello dear Johan, simply it is the same procedure, the geometry is the difference. Prepare the geometry and watch my video about turbine ventilator and the 3D VAWT to see some additional methods for the geometry . Just do the suitable procedure and tell me if you still have questions. Danke!

[@johanmejia2850]

@@haveanicetime ok i understand but if i want into the value of INLET , i have the average values of the air velocity, how should i enter the values?

[@haveanicetime]

@@johanmejia2850 The inlet velocity may be constant or variable with another parameter. If constant even if it is the average of many values, we enter one value. If the velocity changes based on a function, we enter that function using the UDF. Tell me please more about the model and if there is a paper it will be better. Danke!

[@mdshujanali5228]

Hi. Thanks for your great tutorial. I saw that you are also expert in CFX. Why using FLUENT in these simulations? Can we do same thing using CFX? I can get the unknown rotor speed due to inlet flow in CFX ?

[@haveanicetime]

Hello dear MD :) You are welcome ! I use CFX for Turbomachinery because it is easier than FLUENT. For the turbines' simulations, FLUENT is more powerful than CFX due to its many turbulence models and options. Also the user defined functions we use are written in C programming language and we import it into FLUENT easily. The majority of research papers show how powerful FLUENT is in this field. In CFX, we have to write a code using the CFX Expression Language"CEL". I only used it once in a turbine's simulation but without using a complex code. I wish this makes it clear :)..Vielen Dank !

[@haveanicetime]

Also the dynamic mesh is available in FLUENT....Danke!

[@ignatiusgaming1428]

hello, do you have simulation 2D and 3D Horizontal Axis Wind Turbine?

[@haveanicetime]

Hello dear Gian, no but it is the same idea. The wind direction is from left to right for example (In the static domain) and the rotor rotates (The rotating domain) but the geometry will be different in coordinates. Try it and ask if you face a problem. Viel Erfolg !

[@ignatiusgaming1428]

How about geometri?

[@ignatiusgaming1428]

Can you make video HAWT simulation?

[@haveanicetime]

Do you have your own design dear Gian? Danke

[@ignatiusgaming1428]

Can i get your contact may be your email?

[@sandippoudel5160]

Can I calculate the rpm of the VAWT by applying the wind velocity at the inlet?

[@haveanicetime]

Yes. This video shows the rotational speed dependant on the wind speed. Danke!

[@sandippoudel5160]

@@haveanicetime Can we apply this on Vertical axis Savonius turbine?

[@haveanicetime]

@@sandippoudel5160 Yes

[@sandippoudel5160]

@@haveanicetime How can I contact you?

[@haveanicetime]

@@sandippoudel5160 Send me an email to [e-mail] Danke!

[@alfaageng]

Bro is the torque and rpm of 2 dimensional VAWT fluent simulation result same with 3 dimensional?

[@haveanicetime]

Hello dear Alfa, it depends on the nature of the flow arround the blades of the turbine. If the the flow is highly 3D, the results will definitely be different from the 2D simulation. You gotta study some research artciles and see the better way to simulate your case. Thanks

[@rahulbharathwaj6006]

I need to compute the speed at which my VAWT turbine rotates .! Here it is mentioned 3D VAWT, but i can't see it.! Plss help?

[@haveanicetime]

Watch the video carefully.

[@rahulbharathwaj6006]

​@@haveanicetime I have a 3D geometry file (Similar to the savionous turbine). I have created a cylindrical enclosure and named it as rotating domian, and a box enclosure over the rotating domain and named it as stationary domain. Should i follow the same procedure, if not what are the changes to be made in mesh and solver? Because here you domain is just a plane, and VAWT is mounted over your domain.!

[@rahulbharathwaj6006]

@@haveanicetime I have 2 more doubts: 1) Moment of inertia i have got 9 values( Ixx,Ixy,Ixz...etc). My blade geometry is in Y axis. So Which moment of inertia value should i choose? 2) I'm getting a floating point error in my calculation , and my graph values are going to negative values ? So what should i do now?

[@haveanicetime]

@@rahulbharathwaj6006 You must follow the same steps I used. Do not use the enclosure option in the Designmodeler and boolean. Use the method I showed. Use solidworks to generate the CAD files. Then import them The video is clear.

[@rahulbharathwaj6006]

Sir, can I get your contact number or email Id so that I can ask my questions over there?

[@prahladsahu3622]

Hello sir, I am simulating cross flow turbine using 6 dof. Further details are being sent to your mail.. can u plz help?

[@haveanicetime]

Received dear Prahald, vielen Dank!

[@sarangcanshoot]

Hello. Loved the video. It helped me learn a lot about Ansys fluent. But while running the calculation, it is giving me "Dynamic mesh failed. Negative cell volume detected". Please help me out with this error. Thank you.

[@haveanicetime]

Hello dear Sarang, you're welcome! Make sure that you have used the same values I used with the same dimensions and repeat the steps. I faced this issue many times and when I reset the setup, it goes away. Also it depends on the values of the input of the dynamic mesh. Danke!

[@naumanriyazmaldar4571]

Hello, why didnt u update the gravitational acceleration value in the 6dof setting @59:05 ?

[@haveanicetime]

I did not touch it to update it.

[@naumanriyazmaldar4571]

@@haveanicetime yes, that is why i am asking like, wouldn't it be more realistic for accuracy if we also put the gravita acceleration value of -9.81 in z direction... For more accurate answers... Or it does not make any difference?

[@haveanicetime]

We generally use the gravitational effect in simulations like solar heating or if the buoyancy will be studied. In simulations where the gravity is not in the direction of the flow motion, it is not considered. The turbine rotates in x-y plane and the gravity effect may not be included. Always check out the research articles and they mention the settings and the recommendations. It always depends on the experiment and the assumptions. Danke!

[@eliascastillo8516]

@@haveanicetime How can I simulate the rotation of this, inside a container with fluid (water), injecting the same fluid or another. Should I use gravity there? I'm testing by entering gravity, but the values are different depending on the tutorial, but when I use it without gravity it works great. 2D-only simulations Best regards

[@haveanicetime]

@@eliascastillo8516 Hello dear Elias, including the gravity works properly for thecases where you find free fall for example. Here, we just take the effect of the wind forces on rotating the turbine.Thisis not like fixing the rpm as the other caes. Accordingly, no need to take the effect of the gravity. Also, validate your cases against published data for more solid results. Thanks

[@sumitpatil6346]

Hello sir, great work. Can you please tell how can we find out the rpm of the turbine, I'm stuck as I have to find out the output power

[@haveanicetime]

It is clear in the video

[@elmoussaouiilyas2183]

how to calculate Turbulence intensity in 2D Simulation?

[@haveanicetime]

Hello dear Elmoussaoui, check out my video about 2D VAWT. I showed some equations about the turbulence intensity. Danke!

[@thanotoast.5468]

Hey, could you make the same modelling on ANSYS space instead of Inventor please?

[@haveanicetime]

Hello, it is better to use any separate CAD software or the designmodeler because the operations used in modeling these simulations need the designmodeler. Danke!

[@hEmAn634]

The "Six DOF Properties" window did'nt show when I tried to do a similar simulation. Plz help

[@haveanicetime]

Hello, yes, when I click on it, it does not completely appear, I close it and open it again and it works. Be sure that the other things work perfect....Do it again please.. Danke!

[@ahmadhalim9566]

introduce me, I'm halim from indonesia Sir, I have a problem removing this ansys, can I ask you something about Ansys

[@haveanicetime]

Hello dear Ahmad, you are welcome! Go ahead :) Thanks

[@ahmadhalim9566]

can we speak more privately, there are pictures and videos that I will show about the problems

[@haveanicetime]

@@ahmadhalim9566 Yes sir, contact me by e-mail: [e-mail] Thanks

[@ahmadhalim9566]

@@haveanicetime Sir, I have sent you an email about the difficulties I encountered, thanks before..

[@haveanicetime]

@@ahmadhalim9566 Okay dear Ahmad, Viel Erfolg!

[@khalafalsumait]

السلام عليكم و رحمة الله و بركاته انا اعمل على prillin proces لدي مشكله كيف يمكنني ان اجل النزل يدور علما اني علمي 2 d

[@haveanicetime]

Hello, I am sorry I do not understand, tell me more details about the model and the target of the study, Thanks!

[@tyc39]

Hi sir, can u demonstrate cfd simulation of Tesla Turbine

[@haveanicetime]

Hello dear Tan, you can send me some details about it and we can work on it together. Vielen Dank ! [e-mail]

[@tyc39]

@@haveanicetime I have emailed you sir, I would like to hear any good news from you. Tq

[@haveanicetime]

@@tyc39 Received dear Tan :) You are welcome ! Vielen Dank!

[@azriehakimie3324]

Hello sir. I am desperately need your help. After following your video, i have trouble to create surface planar for the 2d vawt. Since i sketched the vawt using solidworks, when trying to make surface planar it says that im selecting non planar or open surface, so i cannot proceed it.

[@haveanicetime]

Hello dear Azrie, the VAWT rotating domain was created by Autodesk Inventor, then I imported it into SOLIDWORKS after being 100% sure that no problem with the design, the problem you have may be due to a mistake in the drawing, the edges are not connected and this leads to open surfaces, make the method of the planar surface on a simple shape, a circle or a rectangle and see if it works or not, then check out again the turbine's edges...And tell me please the progress. Viel Erfolg!

[@azriehakimie3324]

Hello sir, I just finished sketched the vawt using inventor. The problem rn is when i saved in parasolid type file and open it in solidworks, it says that "inconsistent modeller version". Im using inventor v2018 and solidworks v2016. Is it because of the version?

[@azriehakimie3324]

It is because of the version, i opened it in SW 2018 and create planar surface and it went smoothly. I will let you know the progress later. Thankyou.

[@haveanicetime]

Das ist total super sehr geehrter Azrie! Viel Erfolg! But if you face this problem again, save it as a step file because sometimes I face the same problem with the versions and it works without changing the version :), you always have to try step, x_t, IGS, and ASCI :), Thanks

[@azriehakimie3324]

Hello sir, I just finished doing the 2D vawt simulation by following your video. The problem is, the velocity contour is kinda weird. Can I get your email to show you my velocity contours? I dont know what is the problem.

[@muhdzahin5537]

is there who make this tutorial as their project as a thesis? if has, can someone share it to me so i can put it to my references ty

[@haveanicetime]

Hello dear Muhd, simply you can put references related to using this kinda simulations. You should do a search to find research papers about 6 dof dynamic mesh for VAWT. Also you can put the link of this video in the references as a guide tool if you like. Danke!

[@muhdzahin5537]

Thank you sir

[@haveanicetime]

You're welcome :) Viel Erfolg !

[@jackjohnson4436]

Sir very good video. Your video very helpful for me. I have follow your video to do a horizontal wind turbine simulation. Yet I received a warning "Interface zones overlap for mesh interface in2. This could adversely affect your solution." Do you have any idea on how to solve this issue? Or is it ok to just accept the results?.

[@haveanicetime]

Hello dear Jack, the interfaces are not correctly defined. Also the HAWT must be simulated using 3D modeling and in 3D modeling, the interfaces are automatically defined. Review again the steps and see. Get research articles related to modeling horizontal turbines to be sure of the procedure. Danke!

[@jackjohnson4436]

I am doing 3D modeling, not sure what is the problems. Will try to review the step. Anyway thanks for your reply. Danke!

[@haveanicetime]

@@jackjohnson4436 Okay dear Jack, watch my video about the 3D VAWT and turbine ventilator, the only difference is the wind directions and rotation as you know. Danke!

[@kayaeki]

Whats the load on it?

[@haveanicetime]

Hello dear Kenyce, the turbine rotates depending on the wind speed. This is it. Danke!

[@anshulruikar9768]

Can you provide the CAD file

[@haveanicetime]

It is easy to be generated as I showed in detail.

[@technocratsatyam8490]

Why not considering tip vortex effect?? Your domain is not enclosed.

[@haveanicetime]

You gotta get research articles and study a specific case study and then validate the results.

[@edilson1234567890123]

Hello, I am doing a 3d simulation of a Helical Ribbon Impeller. I follow all of your passes, but when I try to set the regions for the dynamical mesh, the fluent suddenly stops. I can’t copy and paste the error messages, but I think that is something about the MPI. Someone with more experience could give me some help? My computer is a Pentium dual core (I know, is very slow). I running the Ansys Student 2020 R1. I try to set Processing option to ‘Serial’, but there isn’t this option (If someone knows how to set this option, give me a tip). The UDF code is: #include "udf.h" DEFINE_CG_MOTION(impelidor,dt,vel,omega,time,dtime) { omega[0] = 0; omega[1] = 150; omega[2] = 0; }

[@haveanicetime]

Hello dear Edilson, sometimes we get this error because of something not right with the setup, maybe the UDF. At least, the computer should have 4GB RAM Core 5. Try to run other simple simulations and see. Also, do not use any UDF now and follow my setup and see if you can run the simulation or not. Danke!

[@edilson1234567890123]

@@haveanicetime Thanks for the advice! I replace my Ansys 2020 R1 with a older version, the 2019 R3. When I use the 6DOF code the fluent doesn't work, but at least I can configure without the fluent suddenly stops. I have another question. I define the dynamic mesh to the volume around the Impeller. Then I just want to set a constant rotational speed (omega) to the Impeller. For the dynamic mesh, do I need to set a 6DOF code to the Impeller, or I can just define a rotational speed to the Impeller in the bondary conditions?

[@haveanicetime]

Hello dear Edilson, for constant rotational speeds simulations, sliding mesh is used not the dynamic mesh approach. The dynamic mesh is used only to let the turbine rotate because of the wind speed. I have mentioned this in the video and you can watch my video about sliding mesh for 2D or 3D simulations. Danke!

[@edilson1234567890123]

@@haveanicetime Hello, thanks for the previous advice. I solve the problems with the configurations of the Ansys, now I am trying to validate my simulations with previous works data. The results are not so good. I am trying to understand why.I am using the same dimension of the impeller SH1 in the paper on the appendix . It's a Helical Ribbon impeller that rotates at high viscous fluid (8000cP).I am setting a mesh motion at the fluid and a rotation speed at the impeller in the boundary condition. Also the tank is stationary at no-slip condition. But when I calculate the Kp the result is very different from the experiment. I tried also using the dynamical mesh, and the result also was not good.Do you have any suggestions?

[@haveanicetime]

Hello dear Edilson, I have replied to your e-mail. Only contact me by e-mail to save time. Danke!

[@mohammadaiman3661]

bro can i ask something based on my cased of study, 3d vawt

[@haveanicetime]

Yes dear Mohammad, go ahead. Danke!

[@mohammadaiman3661]

@@haveanicetime bro, i have problem to make a simulation of 3d vawt, which is the case to make the 3d vawt to rotate with various input of wind speed, to get the angular velocity, and moment, it is possible for me to do simulation without udf?, if you dont mind, can you share with me the step

[@haveanicetime]

@@mohammadaiman3661 Hello dear Mohammad, watch my other tutorials about 3D VAWT without coding. You will find it about VAWT and a turbine ventilator. Check it out and if you have questions, ask please. But this is for the turbines which have a fixed rotating speed. If the turbine has a variable rotating speed, you must use the dynamic mesh like this video and I did not use any udf's. Danke!

[@mohammadaiman3661]

Have a nice time! Bro how can i contact you to ask my problem, actually i already saw you video, but the geometry is no same as mine. Can i get you email bro? I want to show my problem, or you can teach me the step to do it properly

[@haveanicetime]

Okay dear Mohammad, here it is [e-mail]

[@FranzBond007]

YOU ARE THE BEST, I MEAN IT!!!

[@haveanicetime]

AND YOU ARE VERY VERY WELCOME DEAR FRANZ! Gracias!

[@crymaei3728]

hey can i have the 2d geometry please? Urgent!

[@haveanicetime]

Hello, the geometry is very easy to be created using any CAD software. Danke!

[@Sofia_gonzalez28]

thank you sooooooo much

[@haveanicetime]

You're very much welcome!

[@ahmedelsayedahmedabdelal8672]

السلام عليكم حابب اتواصل مع حضرتك

[@haveanicetime]

Hello, you're welcome! Send me an email to mech.eng.ahmedmansour@ gmail.com

[@alphacfd977]

ماشاء الله ..شكرا لك

[@haveanicetime]

You are welcome sir :) :) :)

[@krishgajjar6073]

Sir, the animation thst we got for 3d turbine , is that the velocity of air in there or the turbine blade?

[@haveanicetime]

The velocity of air arround the blades and at the blade surface.

[@krishgajjar6073]

@@haveanicetime Thank you! I got the contours as banded type as ypu got ..but I want it to be like that in the thumbnail..like I need to see where exactly air flows with how much velocity along with rotation of turbine

[@krishgajjar6073]

Please help!

[@haveanicetime]

You have to study some fundamentals and research artciles about modeling VAWT and then use the software. Thanks

[@tarekelbeji5673]

Hello sir , great work .. Could you please send me your email id . I have a few doubts regarding fluent simulation on Savonius turbine . Hope you would help me out.. Thank you

[@haveanicetime]

Hello dear Tarek, you;re welcome! The e-mail is [e-mail] Danke!

[@zainulabedin5819]

Sir Could you help me in one dynamic mesh problem. Please tell me your email id

[@haveanicetime]

Hello dear Zainul Abedin, you're welcome, [e-mail] Danke!

[@eliascastillo8516]

@@haveanicetime Hello, this email is still in use? I have some problems and doubts that I would like to discuss with you. Thanks

[@haveanicetime]

@@eliascastillo8516 Yes, you're welcome!