ANSYS Fluent CFD Tutorial - Flow Over a Cylinder - Von Karman Animation

[@alicetheatheist]

Finally! Someone who really knows what they're talking about! Thanks a lot, sir! This was exactly what I needed for my project! Very well explained, and with a lot of detail for each step. Please, never stop making ANSYS turorials XD

[@drdalyo]

Thank you! :)

[@ranajitmajumdar7836]

practising ansys?

[@jeffrysanjaya8866]

@@ranajitmajumdar7836 9:01

[@ennenrasmoke2963]

@@jeffrysanjaya8866 😂😂😂😂😂😂😂😂😂😂😂

[@ennenrasmoke2963]

@@ranajitmajumdar7836 it is healthier to look for someone in real life.

[@mosquera7703]

You will go down in history bro, best video on this topic ever.

[@dharmavedula8665]

Very good. A must watch video to learn about so many things like geometry for external flow, meshing, transient solution, create plots, movie and von Karman effect

[@drdalyo]

Thx!

[@thawtar682]

Thank you so much!! I have been an OpenFOAM user and now planning to change to Fluent. Your video became a very good starting point for me. :)

[@drdalyo]

Hey thanks for the comment! Glad you liked the video!

[@goosier6]

This is the greatest video of all time

[@drdalyo]

Thanks so much!!

[@oulafatla8686]

This is the first time ever watching such great, clear and helpful tutorial. Many thanks Dr Daly. I learned a lot.

[@drdalyo]

+Oula Fatla Thanks for the feedback!

[@ghazaltaghinia4758]

A bunchof flowers to my great proffessor 🌸🌸🌸🌷🌷🌷tnx a million for sharing this part with us . It really helped me

[@MahdiRahimi-c6f]

after 8 years still the best!

[@yuvix]

Video is so good that I managed to learn how to use the 2020 version, thank you so much!

[@casper_1543]

Used the video on version 2024 R1 (as a complete beginner) and still works wonders!

[@mustafasabah1804]

thanks alot its really useful tutorial. its my first time of using fluent and i found the video very clear in steps and every thing

[@drdalyo]

+mustafa sabah thanks!

[@ShayanAsim]

I really appreciate this tutorial. Please keep up the good work! Liked and subscribed and looking forward to more awesome stuff.

[@dinil21]

thanks man for the tutorials. Please keep posting

[@benitoberlanga6874]

Thank you for the CFD tutorial. It was very informative and easy to follow.

[@editorijrei5368]

Flow around a square cylinder using fluent kzbin.info/www/bejne/m2Wll4GCgb6jnKs

[@marcospardeiro2819]

Fantastic video, it's nice to listen you. You explain things clearfully and precisely. Thank you!

[@Dryaspis]

When I go to mesh > sizing , I can't find "Max size" for some reason I also noticed that under sizing, in ny screen it says "Use Adaptive Sizing" and next to it it says "No" and not "On: Curviture"

[@muhammadsyafiq6876]

having the same problem :(

[@BrainDead4689]

Helped a lot..... still a tonne of things to learn about Ansys fluent! Thanks, DrDalyO!

[@atharvpal7038]

damn this was spot on! you good sir, I guess saved my project review in 4 days! Thank you!

[@38sohaib]

Very helpful video. I highly appreciate your efforts. keep up the good work

[@drs.n.gunasekara4504]

Sensible Teaching ... Good bless you and your kids!!!!!!!!!!

[@upekaweerasekara332]

Straight as an Arrow!! Keep up the good work

[@drdalyo]

Txx

[@hoidinhthi6051]

Thanks. This is a great video. Wait for your next videos

[@nassimbouras6166]

well done explaination. thanks. please keep posting more.

[@kadaluarsa-316]

best tutorial on youtube. Thank you very much

[@drdalyo]

Thank you!

[@abhishekjoshi5244]

your teaching is fantastic

[@vishnuambali6837]

With Re=100,v=1m/s,density=100.When i simulate an unsteady flow I always get the Cl to be greater than 0.3 eventhough the frequency is .16(St=.16).Why I am not getting the value of CL

[@nonimek1781]

Hello friend at Re=100 the simulate will be unsteady? and what about the vortex?

[@prakhars962]

Although I was not able to run the simulation after 0.5s, has some problem with time steps as many options have been changes in ANSYS 2020. Have to say, I learnt a lot.

[@mitralanka26]

Hi Dr Dalyo, I am working on a 2-way Fluid structure interaction project related to RBC in capillaries. I have designed a micro-scale shell RBC and a fluid medium which has diameter just above the dia of RBC. In the transient structural analysis I have defined two fluid surface interfaces: 1. Exterior portion of RBC 2. Interior portion of RBC. In the Fluent medium I have defined the walls, boundaries of capillary tube and cytoplasm (hollow portion of RBC) which are supposed to interact with with the solid RBC in Transient. I have assumed that blood runs at x velocity and cytoplasm relatively at 0.97x velocity. Similarly, in transient I have 0.97x velocity, 9.7x displacement to Solid RBC When I run the analysis by coupling both systems I receive error by doing so. But if I reduce the time step (0.0004) sec for 10 sub-steps ,velocity to 0.0000097x and displacement by 0.000097x solution runs smoothly. Irrespective of correctness of result, Could yo please tell me why is that if i decrease the velocity, displacement and time steps there is result and why if i consider real time scenario this does not work? Thanks

[@oulafatla8686]

How can I make this cylinder rotates? just to detact the effect of the rotation on Von Karman street? thanks

[@drdalyo]

+Oula Fatla I dont really understand the question..

[@oulafatla8686]

Hello my question was how can I model a rotating cylinder in a fluid flow. lets say the same case in the tutorial video but with a rotating cylinder. As mentioned in researches rotation effects significantly the vortex shedding activity behind the cylinder. How can I achieve this case numerically? Thank you

[@drdalyo]

+Oula Fatla Ok! so say using the same tutorial as above, go into fluent, on the left choose "Boundary Condition", then choose "cylinder", then "edit". In the Wall menu, under wall motion, select "Moving Wall". Then set the motion to Rotational, and choose your speed, say "200 rad/s" and click ok. Reinitialize and view the results. For more accurate results, you can change the viscous model instead of laminar to k-epsilon. Let me know how it goes. If it answered your question please subscribe and like! Thanks!

[@oulafatla8686]

Thank you so much for your help. The simulation went very well. The suppression of the von Karman street behind the cylinder can be clearly spotted from the u velocity vector and the lift coefficient plot. Thanks again

[@enverozer24]

Very nicely presented.Good work.

[@drdalyo]

thank you!

[@haveanicetime]

Hello dear Dr. Dalyo, thank you very much, if we have a rotating airfoil of a vertical axis wind turbine and we select the airfoil to monitor the lift coefficient and we set the force vector (Y direction =1) as the default settings, will the lift coefficient be accurately calculated when the airfoil changes its position? will the calculated lift coefficient be always perpendicular to the drag? Thanks

[@anupriya452]

Great job sir 👌👌👌👌

[@aminationtv7476]

you r dominant on explaining and tutoring . good job . thanks

[@drdalyo]

+AMINATION TV Thanks!

[@fenghao9736]

Very nice and clear tutorial!! Thank you, Sir!

[@drdalyo]

Thank you!

[@fyingg8736]

thanks dude. it was extremely helpful and i learned a lot.

[@M1n1F00t]

I'm trying to recreate similar meshing options but for a 3D model. However, when I apply the edge sizing and inflation options, it doesn't generate the uniform mesh that you see around the cylinder at 5:10. I've manage to recreate the mesh on a 2D model with ease but am only having complications with the 3D model. Any advice?

[@ryankaushal2767]

just loved the tutorial.

[@abusufian3288]

Appreciate your effort man

[@KoreAZNfreak96]

At around 12:20, how were you able to have the "symmetry plane 1" and "symmetry plane 2" planes under surface_body?

[@michal9916]

When I use "Animation" fluid look like at 16:39 in your video. I had only yellow, green color. How can i return to full colored pictured as like 13:27?

[@khushims]

Wonderful video... it was very helpful... You have explained everything very nicely... thanks very much

[@LMGuzz]

Absolutely well explained

[@drdalyo]

Thank you!!

[@joenetworkstv7866]

Thankyou for the tutorial, was so helpful in my project

[@imranhasan3079]

Thanks a lot sir for sharing knowledge

[@sushilchamp]

Thanks for video and i wanna suggest you one thing, pleas put a pointer gesture so that the pointer position could be easily detected...

[@amanjain4729]

very nicely presented. Although working with realistic values of density and viscosity would have been much more better. Thanks for the good work.

[@editorijrei5368]

Flow around a square cylinder using fluent kzbin.info/www/bejne/m2Wll4GCgb6jnKs

[@dishantgera8152]

Extremely helpful! Thank you so much :) Could you please do a video on flow over an airfoil and boundary layer separation...

[@Raerae705]

Thank you very much. This was extremely helpful. I would love some advice on how to create a 3D drawing, and apply the same principles.

[@padmanabhaprasannasimha5385]

Excellent work..!!!

[@dlklcb]

thank you so much for this video I would like to ask is there any way we can see the plot of vortex induced vibrations.

[@商晶衛]

In Geometry 2:45 why use [Concept Surface from sketch] to create SurfaceSK1 ? What is this for? Thank U

[@MarcoTheGrim]

That's a really nice video, learned a lot. Thanks.

[@drdalyo]

Marco Antonio Thank you!

[@morane5524]

Extremely helpful, thank you

[@colinliu25]

The video has been very helpful. Thank you!

[@drdalyo]

+Taiquan Liu thanks!

[@sadass4740]

Very nice tutorial. The best on youtube so far. Can I request you to please put a few more fluent examples (FSI kind maybe?), if you find the time. It'll be a big help. Cheers!

[@drdalyo]

+sadass what kind of FSI, like the stress results from an object under a flow field? Maybe like the stresses in a support bracket from a pipe with flow.

[@sadass4740]

+DrDalyO Yes, that would be really amazing and helpful! Stresses on an object due to the flow field. I am basically trying to learn to finally do some coupled problems of fluid structure interactions, like a body oscillating in fluid due to flow and thereby altering the flow.

[@drdalyo]

+sadass Ok I will add it to the list of videos. Thanks for watching!

[@benjamindas9220]

Very nicely explained......sir can you please show some tutorials on welding of two plates and doing there fluid flow analysis at the weldpool

[@afzal6038]

Really it's nice . You explained clearly .Thanks

[@AJ-et3vf]

Awesome video! Thank you!

[@pamstone8322]

Hi and thanks again for your wonderful video. What if we want to put a porous cover around this circular cylinder and see how the fluid flow changes? how we can introduce that porous cover into Ansys? Thanks.

[@KamilaHardy]

Hi there, great video by the way! really helpful! I have one question: How much more refined does the mesh need to be, in order to run the same case but subjected to a higher Reynolds number - Say 10^4. Thank you!

[@AlAminSajive]

Its very helping. But can you please explain if there is any mathematical calculation for setting bias factor or edge sizing?

[@drdalyo]

+subrato roy yes you can set a bias factor for edge sizing in the Mesh-Sizing tool, there is a option to select a bias.

[@IzonVez]

How come the "wall"s of the domain produce no boundary layer along itself?

[@tahaadnan5907]

Thanks for the video....I am getting cd as 0.46 for the same geometry and same velocity? Strange.... What could be the reason?

[@drdalyo]

Could you provide more detail to your question?

[@bibhorshrestha2952]

thank your very much for the video..but I have a problem in the result section...i got only one time step in the list of time selector even though the number of solver step is 207...

[@agnideepchakraborty6588]

Thank you for this wonderful video sir. I am a beginner in this field. I am having a doubt. Is there any way to observe the stress profile on the cylinder body ?

[@USTCZZG]

Very good tutorial. Thanks a lot.

[@ankitsharma-le2vd]

Great video, why you have stop making videos please keep uploading so we can learn from you

[@CDescardeci]

Hi ! Very good, a little fast but very useful. Let me ask you.., my computers takes "ages" just to complete the Mesh, it stays showing the "Ansys Workbench update Model Status" for too much time. Is it a problem with my computer or is there a way to get it Faster ? Yes because if it takes such a time just with the Mesh then I don't want even try with the Fluid Computation. Thanks

[@drdalyo]

You can try increasing the number of cores the program uses. There is a setting for this in solver settings.

[@hongxiagu4935]

Thank you for your video, and could you please give me information about the u velocity near the upper and bottom wall being almost the same as the main flow while the boundary conditions are set to wall?

[@milagrosmv4143]

why do you select "y axis" to calculate drag coefficient?

[@mandargadkari5714]

can we rotate the cylinder & graph of coeff. of lift vs spin ratio of cylinder

[@Pumka_games]

thanks a lot! can you give a quick tip about how to get the result from the fluent and use it in structural analysis? I.e. I want to analyse the wing , get pressure diagrams, get the force reaction in wing's mounts, and then use this forces as the load in mounts analysis.

[@drdalyo]

+skullheaddd1 you could drop a static structural on the project page and link the results from fluent to static structural and check the forces. If not, in fluent there is also CD and CL coeficcients as well as other post features

[@alirezaeslamian4667]

thank u so much, it was really a perfect tutorial!

[@tboxer100]

Thanks it is really helpfull. I'm new cfd learner and have a bit noob question. I just try just simple steady flow over cyclinder with the video' s mesh and Setup and when gravity is not specified it didnt give proper results. and when ı try von karman with specified gravity it didnt give same results also. So what is the importance of gravity or when should ı specify gravity and when should ı don't

[@zariqbahrin6170]

love the way you explained all the process involve , but somehow i as student cant relate how the set up will affect the analysis , which i need some explanation in term of simulation so that i could understand better. Thank you for the video

[@umbertocostabitencourt3695]

You helped me a lot bro, thank you

[@nguyenminhdta48]

Thank you very much. Your tutorial is very helpful for me

[@1992koi]

great video, man.

[@drdalyo]

Thanks!

[@chuaner4578]

I like this video, it is helpful. I was wondering that how to simulate a airfoil with different angle of attack in a fixed domain. I basically have the problem that the whole fluid domain is rotated when l wanted to give only the angle of attack to the airfoil only.

[@chuaner4578]

right.. thanks

[@yuriihusak1959]

It was awesome! I did it! thank you!!!!!!!

[@jaylive99]

how to induce a gradual increase in velocity? can we use expressions?

[@drdalyo]

Yes of course! I have a video on a 3D airfoil where i show how to do this. You can check my channel for this video trailer and email me for how to get access.

[@ahmedhassanin3456]

Great job on the video, well explained. I am just a little confused about one part. How come you get this type of flow when the flow is set to laminar but according to your input the Reynolds number = 80 which is turbulent. I tried running the same problem with a K-epsilon turbulent model but got a normal velocity contour without the vortices about to form. Any explanation to why this is so? Thank You

[@drdalyo]

Im not sure I understand. A reynolds number of 80 is not turbulent but laminar. The von karman effect only occurs in laminar or low reynold number flow.

[@ahmedhassanin3456]

+DrDalyO You are right, I misunderstood when Von karman effect occurs, I thought it was due to turbulent flow. Do you have a similar video regarding inducing vortices from turbulent flow?

[@drdalyo]

At the moment I do not have any such video, however I could add it to my list of videos to make! Thanks for watching!

[@Daban980]

can you please do the same tutorial but this time include springs for oscillating the cylinder in X,Y direction!.

[@mobasharhasan9685]

Great video, learn so much. Is there any way to transfer the mesh in the OpenFoam? Really appreciate the help.

[@beautifulplaces4900]

Nice work DrDalyO! Please upload a tutorial on a cylinder in 3D domain. Thank you!

[@Payungization]

How to determine the time step size and number of time step to get maximum accurate result but don't need much time to complete running?

[@uali.7]

Hi, can you please give a tutorial on rotating oscillating cylinder (clockwise and anti-clockwise) about its axis.

[@muismuhtadi359]

Thanks for the video. It gives me a nice start to learn fluent. In my research I need to know odor transport where the source is on the floor. If the odor source is assumed to be an round inlet on surface body emitting the odor, how can I create this inlet? Thank you!

[@limammah3353]

Thank you Dr Dalyo , if I want to place the cylinder in different locations near and far from the wall and simulate it how can I compare the drag and lift force of both geometries, THANK YOU

[@mahmoudsar86]

Thanks a lot for the great work. Could you please do flow over articulated beams? Thanks

[@MohamadKharseh]

well done and clear, thumb up

[@NitishKumar-bt2wx]

How to implement lift and drag report in monitor? Because it's not there in my monitor option of setup only residual one is there.

[@magip355]

Excellent video, very clear and helpful. I got stuck at the end, it says that i dont have a license for cfd post... I downloaded the ANSYS student file online, is that a limitation on this file???. Has anybody experienced this, i cant find any info on this matter.... Thanks

[@ibrahimkavak4885]

thank you , that was helpful , would be nice if you put more videos

[@syamsulazry]

One of great tutorial i have ever seen. Thanks. Do you have tutorial for 3d case?

[@eltemplodeezequiel]

Why did you use the Laminar option for the viscosity?

[@hopkinsjr436]

Thanks a lot, I hope you do more fluent videos including 3D ones

[@AndromedaOfficialChannel]

Great video! Thanks a lot, helped so much!

[@BassamBadran]

Great explanation, where do you keep the rest of the videos please, I would like to learn more. Thanks

[@rushikeshbadgujar8091]

Thanks for sharing, can you do a video for 3D wing with "Assembly" with various AoA? Please

[@luizotaviocfg]

I had a problem on finding the mesh file. In the "settings" step this message is always displayed: "File "C:\Users\LuizOt?vio\Desktop\projeto aerofolio_files\dp0\FFF\MECH\FFF.msh" not found!" What does it mean? How can I fix it?

[@drdalyo]

+luiz I never had this problem. have a look at this link: www.eureka.im/86.html