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
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
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"
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.
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!
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
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
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!
+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.
+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.
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
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 ?
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
Thank you for this awesome tutorial. Very well presented. can we find any other tutorials from you about fluid flow over ordinary shapes and also porous medium on youtube? Thanks
DrDalyO The simplest one would be a rectangle of half solid and half porous medium. This can be the start. Simulation of the following paper is also a good practice in order to compare the results: C. Chan, E. and F.-S. Lien (2005). "Permeability Effects of Turbulent Flow Through a Porous Insert in a Backward-Facing-Step Channel." Transport in Porous Media 59(1): 47-71. Thank you
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.
Hello, i wanna analyze a golf ball. You put the empty cylinder shape in the middle of the domain. How can i make the golf ball shape at the center of the domain?
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
+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!
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
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.
+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
Great tutorial! +1 like. One question if possible, is it right that fluctuation of the CI (in the final result not the up and down due to errors from the calculation)? or is it another error from the calculation? I think it is an effect from the physics, but not sure. Greetings.
pal3 pale2 Hi pal3pale2, Im not sure if i completely understand your question, but the fluctuations for the lift coefficient (Cl) is not an error, but rather the physical effect (Von Karman effect) over the cylinder. This is what causes the Cl to alternate.
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?
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.
Hi Dr Dalyo, I am modeling vertical axis wind turbine ( VAWT ), I get confused with the time step size and the number of time steps. I suppose to get my result for two complete revolution of the turbine. I will be grateful if you can advice.
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
Thanks for the video! Super useful! I just have one question, how do you calculate, let's say, flux of flow rate in one cell of the mesh using the cfd-post over each time-step?
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
Thank you! :)
practising ansys?
@@ranajitmajumdar7836 9:01
@@jeffrysanjaya8866 😂😂😂😂😂😂😂😂😂😂😂
@@ranajitmajumdar7836 it is healthier to look for someone in real life.
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
Thx!
This is the greatest video of all time
Thanks so much!!
This is the first time ever watching such great, clear and helpful tutorial. Many thanks Dr Daly. I learned a lot.
+Oula Fatla Thanks for the feedback!
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. :)
Hey thanks for the comment! Glad you liked the video!
A bunchof flowers to my great proffessor 🌸🌸🌸🌷🌷🌷tnx a million for sharing this part with us . It really helped me
Video is so good that I managed to learn how to use the 2020 version, thank you so much!
Used the video on version 2024 R1 (as a complete beginner) and still works wonders!
Thank you for the CFD tutorial. It was very informative and easy to follow.
Flow around a square cylinder using fluent
ua-cam.com/video/e4BfNLLYpfI/v-deo.html
after 8 years still the best!
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
+mustafa sabah thanks!
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"
having the same problem :(
Sensible Teaching ... Good bless you and your kids!!!!!!!!!!
Fantastic video, it's nice to listen you. You explain things clearfully and precisely. Thank you!
best tutorial on youtube. Thank you very much
Thank you!
I really appreciate this tutorial. Please keep up the good work! Liked and subscribed and looking forward to more awesome stuff.
Really it's nice . You explained clearly .Thanks
Helped a lot..... still a tonne of things to learn about Ansys fluent! Thanks, DrDalyO!
Very helpful video. I highly appreciate your efforts. keep up the good work
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.
thanks man for the tutorials. Please keep posting
you r dominant on explaining and tutoring . good job . thanks
+AMINATION TV Thanks!
Very nice and clear tutorial!! Thank you, Sir!
Thank you!
Straight as an Arrow!!
Keep up the good work
Txx
thanks dude. it was extremely helpful and i learned a lot.
Absolutely well explained
Thank you!!
Wonderful video... it was very helpful... You have explained everything very nicely... thanks very much
well done explaination. thanks. please keep posting more.
Very nicely presented.Good work.
thank you!
your teaching is fantastic
Thanks a lot sir for sharing knowledge
very nicely presented. Although working with realistic values of density and viscosity would have been much more better. Thanks for the good work.
Flow around a square cylinder using fluent
ua-cam.com/video/e4BfNLLYpfI/v-deo.html
Thanks. This is a great video. Wait for your next videos
The video has been very helpful. Thank you!
+Taiquan Liu thanks!
Thankyou for the tutorial, was so helpful in my project
That's a really nice video, learned a lot. Thanks.
Marco Antonio Thank you!
Awesome video! Thank you!
thank you , that was helpful , would be nice if you put more videos
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!
Thank you so much that was very helpful
welcome!
Very good tutorial. Thanks a lot.
just loved the tutorial.
Thank you very much. Your tutorial is very helpful for me
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
Extremely helpful, thank you
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
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!
+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.
+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.
+sadass Ok I will add it to the list of videos. Thanks for watching!
Thanks for video and i wanna suggest you one thing, pleas put a pointer gesture so that the pointer position could be easily detected...
Very nicely explained......sir can you please show some tutorials on welding of two plates and doing there fluid flow analysis at the weldpool
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
You can try increasing the number of cores the program uses. There is a setting for this in solver settings.
thanks for this tutorial sir.
Welcome!
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.
Great job sir 👌👌👌👌
Extremely helpful! Thank you so much :)
Could you please do a video on flow over an airfoil and boundary layer separation...
Excellent work..!!!
thank u so much, it was really a perfect tutorial!
How come the "wall"s of the domain produce no boundary layer along itself?
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 ?
Appreciate your effort man
Thank you sir
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
Thank you for this awesome tutorial. Very well presented.
can we find any other tutorials from you about fluid flow over ordinary shapes and also porous medium on youtube? Thanks
Parry Pal I do not have any other videos yet, do you have a particular shape in mind? i could maybe make a video on it.
DrDalyO The simplest one would be a rectangle of half solid and half porous medium. This can be the start. Simulation of the following paper is also a good practice in order to compare the results:
C. Chan, E. and F.-S. Lien (2005). "Permeability Effects of Turbulent Flow Through a Porous Insert in a Backward-Facing-Step Channel." Transport in Porous Media 59(1): 47-71.
Thank you
Its very helping. But can you please explain if there is any mathematical calculation for setting bias factor or edge sizing?
+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.
Great explanation, where do you keep the rest of the videos please, I would like to learn more. Thanks
Thanks a lot, I hope you do more fluent videos including 3D ones
well done and clear, thumb up
Thank sir
Please add from beginner to expert series
Bro where to download ansys fluent from?
Hi, can you please give a tutorial on rotating oscillating cylinder (clockwise and anti-clockwise) about its axis.
muchas gracias, fue un excelente vídeo, sos un maestro !!
+Rodrigo Alvarez gracias!
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.
Hello, i wanna analyze a golf ball. You put the empty cylinder shape in the middle of the domain. How can i make the golf ball shape at the center of the domain?
Nice work DrDalyO! Please upload a tutorial on a cylinder in 3D domain. Thank you!
Great video! Thanks a lot, helped so much!
thanks for this men! solid stuff! If you have time, can you look into doing RT instabilities?
Possibly!
thank you so much .
can you please do the same tutorial but this time include springs for oscillating the cylinder in X,Y direction!.
great video, man.
Thanks!
Thanks for sharing, can you do a video for 3D wing with "Assembly" with various AoA? Please
How can I make this cylinder rotates? just to detact the effect of the rotation on Von Karman street? thanks
+Oula Fatla I dont really understand the question..
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
+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!
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
Thanks for the video....I am getting cd as 0.46 for the same geometry and same velocity? Strange.... What could be the reason?
Could you provide more detail to your question?
why do you select "y axis" to calculate drag coefficient?
Still irradiating! Thanks
Thanks a lot for the great work. Could you please do flow over articulated beams? Thanks
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.
+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
Great tutorial! +1 like. One question if possible, is it right that fluctuation of the CI (in the final result not the up and down due to errors from the calculation)? or is it another error from the calculation? I think it is an effect from the physics, but not sure. Greetings.
pal3 pale2 Hi pal3pale2, Im not sure if i completely understand your question, but the fluctuations for the lift coefficient (Cl) is not an error, but rather the physical effect (Von Karman effect) over the cylinder. This is what causes the Cl to alternate.
DrDalyO Thanks! I didn't know that effect very well. Yes it is what I meant, thank you very much.
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.
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?
Thanks a lot... I can finally generate the turbulence behavior... =)
Thank you very much!! Great video
Thank you!
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.
right.. thanks
Hai, this video was quite helpful. I wanted to know one more thing. Can we specify the reynolds number instead of giving as turbulent or steady flow ?
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?
Thank you so much ! This really helps
Hi Dr Dalyo, I am modeling vertical axis wind turbine ( VAWT ), I get confused with the time step size and the number of time steps. I suppose to get my result for two complete revolution of the turbine. I will be grateful if you can advice.
It was awesome! I did it! thank you!!!!!!!
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
Hello friend at Re=100 the simulate will be unsteady? and what about the vortex?
Thanks for the video! Super useful! I just have one question, how do you calculate, let's say, flux of flow rate in one cell of the mesh using the cfd-post over each time-step?
thank you so much you!re the best teacher
One of great tutorial i have ever seen. Thanks. Do you have tutorial for 3d case?
Great video, learn so much. Is there any way to transfer the mesh in the OpenFoam? Really appreciate the help.
Thank you DrDalyO! God bless you