Ansys Turbine Analysis || Dynamic mesh || 6DOF analysis

[@saroj4736]

good video have you any video related to dynamic mesh for airfoil using udf

[@danidemi9121]

Thank you very much! I solved my problem due to your video! Good luck!

[@umitbeyazgul2963]

Hello sir, I tried to come to a conclusion by means of your method 6DOF. However, it seems that something went wrong due to the float point when I adapt my modelling to your steps.

[@Rau379]

Hi, great tutorial, thank you! Could you explain why the interior source is as deforming in DOF?

[@mahditayyebi8148]

@Viraj Gandhi Hi viraj I do the setup that you told in the video exactly but i have an floating point exception error in my promlem and i want help from you 🙏🙏🙏🙏🌹🌹🌹🌹

[@paranoid_android6702]

Hey man I have a doubt.. Need your help. I am doing dynamic meshing.. Similar setup in 3D. First doubt - That Rotate UDF you used is written by you or was it predefined? 2nd Request - Can u share the UDF used.. I want to know the functions, i think my udf should be almost right, your udf would be a great example to me.

[@zefrianzefinandi6507]

very good tutorial about dynamic mesh, but i have problem like you tutorial, can you help me viraj.??

[@Thonix94]

Great video and information. Thanks for the upload

[@gurubasavaraj2560]

What is that "contact region " ?@3.16

[@sriharimenon7502]

Hi again Viraj. I messaged you with links to the .wbpj file, but didn't hear back from you, but that's alright. I just want to know how to make the mesh connection. I'll elaborate what I did. I made a similar (and simpler) geometry on DesignModeler: I sketched the surrounding, then using 'create surface from sketch' concept, created the 2D surface. I then switched it from 'add material' to 'add frozen'. That finished my surrounding. Then I made a new plane (coplanar with the original plane) and sketched the inner on this new plane, and repeated the whole process. In the end, I had two bodies and two parts (merging the two parts into one part isn't helping me). In meshing, I deleted all other automatically generated connections, and selected the edges like in 3:23 in your video. I realized something may not be right when the 'advanced' section didn't come up in "bonded" details. It said it made the connection, but the simulations never work because the inner mesh moves independent of the outer domain, suggesting the meshes may never have been connected. I think I've made a mistake in geometry design (either that or I'm not meshing correctly). Kindly tell what may be wrong. Thanks!

[@virajgandhi3121]

You did not subtract 2nd body from 1st body. I think you should this process: Make surrounding. [Same way you did] [Don't freeze] [Body 1] Make your internals or turbine [same way you did] [Body 2] subtract body 2 from body 1 [don't preserve body] create another circle sketch inside surrounding enclosing turbine use split face from edge method. Now you should have same geometry I have in here. Let me know what happened.

[@sriharimenon7502]

Hi Viraj. Excellent video. I'm having trouble making the connection between the meshes: Not being able to select the contact edges. I made a similar (and simpler) version of this turbine on DesignModeler, making two different parts, and using the surface-from-sketch concept. 1. The model tree shows three extrusions. are these solid plates with little thickness, or are they surfaces? 2. in case they are surfaces, how were you able to select the contact edges? They overlap for me. Could you please have a look at my problem? Do tell how to contact you.

[@virajgandhi3121]

If you have used surface-from-sketch, it must be surface only. If they overlaps, you can hide one body/surface then select the edge you want. To contact me message me on KZbin itself.

[@sriharimenon7502]

Messaged you

[@ahmedsafroot]

Hello, did you simulate it? Thanks

[@iqbal6052]

Halo Viraj. thanks for the video.. can you make set up dynamic mesh for agitator in tube?

[@adamalfakhri2300]

Hello viraj, i wanna ask a question.. did you use shared topology for the domains?

[@realkanavdhawan]

It will be shared, but you have to make sure the fluid across shared boundaries must be same

[@shivambhandari2377]

Sir....that was a great video...but can you do analysis of 3d turbine...it will help us to understand more

[@mahditayyebi8148]

Hi guys Which one of you have a viraj Gandhi's email? I have work to do immediately Thank you 🙏

[@ahmadhalim9566]

I have a problem in the analysis, I need the results of the analysis in rpm rotation, but in my simulation the fluid flowed doesn't reach the blade, can you make tutorial with my design.? thanks..

[@miqdadalazzam]

Did you solve this problem? I need know it

[@khadijarahal3610]

hello, is it possible to ask you some questions ? thanks

[@shivamshende3036]

Hi Viraj, can you make video for cfd analysis of brake disc for finding heat transfer (convective) coeficien

[@khadijarahal3610]

Hello, I am working on the numerical simulation tridimentional of two-phase flows around a Savonuis rotor with Ansys fluent (VOF method), in fact I created two domains, a fixed domain and a rotating domain containing the rotor, I chose the sliding mesh method and I imposed a rotational speed for the rotating domain in cell zone conditions , in this context, I noticed after the calculation that the jet of water coming out of the penstock does not strike the rotor to turn it and the rotating domain does not turn and both interfaces block the water to turn the rotor and that the rotor rotates with the air before the jet of water strikes it and I got unrealistic values of epsilon, What can I do please? and thank you in advance.

[@ferifebrizal468]

excelent work dude, is it the turbine rotate due to flowing fluid from the inlet? thank you.

[@virajgandhi3121]

Feri Febrizal Yes.. That is why this is 6DOF.

[@ferifebrizal468]

Viraj Gandhi how you creat the udf function ? Hope tou can tell me more :(

[@virajgandhi3121]

Feri Febrizal That is the topic for another video You cal always learn more from Ansys user manual

[@saroj4736]

@@ferifebrizal468 this does not reuire a udf function. it inbuilt in ansys

[@alimbacakoglu6278]

I have encountered flotating point exception and negative volume cell detected. I can not get rid of them. Can you help me ?. I have restricted time. can you share this ansys project file with me?

[@ewentry]

Reduce the time step let's say your step is 0.01 s then you should make it 0.001. Floating point error is mostly due to wrong boundary conditions. Check your settings.

[@alimbacakoglu6278]

@@ewentry I have tried your comments but i can not reach a solution

[@ewentry]

What about the mesh quality? Is it coarse too dense?

[@alimbacakoglu6278]

@@ewentry I used 0.5 mm to 5 mm max face size but it is keeping to say negative volume cell detected

[@virajgandhi3121]

Most probably you made the circle too close to blades. make a little big circle and also keep some space from nozzle.

[@masirohatsune9375]

Hello Viraj, How can I monitor the pressure or others parameters of each blade of rotor in your case? Thank you!

[@virajgandhi3121]

Create a named section in DM or meshing tool. Then in fluent, go to "reports" and from surface reports, you should be able to see it.

[@thochiseb]

how did you calculate moment of inertia?

[@Viraj318]

6DOF is method name. In 2D you won't have 6DOF anyway.

[@thochiseb]

i wanted to calculate moment of inertia for savonius turbine

[@kalvathyful]

Hey bro... I need your help in my work. Please do let me know on how to give both SLIDING MESH AND DYNAMIC MESH in a project? That means, my turbine has to run both by the motor RPM and also with the force by the water flow. Thanks a lot in advance. Will be expecting your valuable response in this concern.

[@malomatimedia3494]

kindly share this geometry

[@sagarchaudhari8779]

will you please help me in simulation of leakage flow due to pressure difference brtween two parallel plates, where one plate is stationary and other one is moving with DYNAMIC MESHING..PLEASE

[@virajgandhi3121]

Sagar Chaudhari mail me

[@EverythingAtOnceWithJoshi]

Niiice..

[@AvinashSingh-hp1pt]

hello viraj. i am getting some problems creating the connections between the zones in the meshing part. please help.

[@ahmedsafroot]

Hello, did you simulate it? Thanks

[@ANDREW49103]

geometry file?

[@virajgandhi3121]

Obinna Ofielu This tutorial is for 6DOF analysis. Design is really easy actually. You can see the steps in left side of NX as well.

[@ahmedsafroot]

Hello, did you simulate it? Thanks

[@vaansocial]

Can you please upload the geometry and share the drive link to it?

[@variousvideos554]

really your explain not clear and you are not posted in the UDF code and you have a steps not explain the vide, anything's see this tutorial not useful.

[@mohamedsouissi5910]

Hi , i want to Know how you do the separation between the rotating domain and thé rest of the fluid domain because i can't do it in DesignModeler , it fusions the domains Always even when i mâle différent surfaces

[@ketanmeshram5293]

Speak loudly