Hi, it is an great tutorial it helped me during my engineering thesis in aeronautical engineering. One small note - when you are talking about surface of the wing - it is wing or just surface, not airfoil because airfoil is only 2D.
HI,this is a very helpful video, thank you very much. I have a big annoying problem, I follow the video for meshing and parameter setting, but when I change the AOA to 6°, it doesn't converge
This is an annoying issue that sometimes occurs with difficult simulations. My recommendations in order of importance to fix the problem would be to 1. Check the boundary conditions thoroughly. It is often mistakes that leads to this problem 2. Change solver. Sometimes another solver is needed for different applications 3. Change the relaxation conditions in Ansys to support slower convergence but a more stable solution 4. Run with mulitple meshes to see if the problem consists
Hi, this is an excellent video tutorial on how to set-up a CFD simulation, thank you. I have encountered an annoying problem which I have been trying to solve for the past hours. After I sketch the refinement rectangle around the airfoil and want to extend it, annoyingly, the whole solid disappears. Have you encountered this issue before? If so, do you mind sharing a solution to it? Kind regards.
Hi, no I have not encountered this problem but all I can suggest is that you take a look at what settings are on the extrude, ie if “merge bodies” is on then it might be merging the solid body with the fluid body If there are any further issues, send on an email
@@cillianthomasengineering Thank you for your quick response and proposed solution. Believe it or not, I have managed to figure it out just now haha! The solution was related to the “Add material” function of the extrude options. Switching up to “Add Frozen” solved the issue and I have managed to load it into Mechanical and generate a mesh!
Following report-plots are not valid: report-def-0-rplot: Contains following invalid reports: report-def-0: List of walls is blank I'm getting this error can you help
That's a good video. However, the student license only supported 512000 elements, so it was not possible to input physics properties. Instead, I did it with a simple geometry through this video. Thanks from Germany for your video.
Thanks Kwon. I did a 2D naca 4 digit tutorial for the student version since it is hard to do 3D with such few cells. Did you get good results in the student version? Would be interesting to know for others if it is possible to still get good results with only 500K cells
@@cillianthomasengineering I limited the diameter of the sphere to 5m in order to meet the elements 500k limit, and proceeded with the task. Furthermore, the size of the elements was much larger than yours.
@@cillianthomasengineering Your result: drag 0.019198263, lift 0.25372967 Pressure coefficient: max. 0.75, min. -1 My result: drag: 0.02342472, lift: 0.24747622 Pressure coefficient: max. 0.69, min. -0.7 The pressure coefficient distribution graph is drawn similarly to NASA's graph as a whole.
Hi, I found this video really helpful. However, i have encountered one issue. I am running ANSYS R19.2, i followed the exact same steps shown in the video and although i get practically the same results for Drag Coefficient and pressure coefficient, my lift coefficient is about 30% less than the one you find. Any suggestions?
Hi Cillian, I watched your video, but I'm having trouble with the preference method you recommended. Every time I switch from CFF to legacy, I encounter an issue opening CFD. The error message I keep receiving is: "The run 'RunSteady' in simulation 'Simulation' contains transient output but no output files were defined." However, when I switch back to CFF, CFD post opens successfully, but I can't visualize the pressure coefficient on the Y-axis. This data is crucial for validating my ongoing research work, so your assistance on this matter would be greatly appreciated.
Hi Cillian, I watched your video on the "3D Aerofoil Tutorial in ANSYS FLUENT - NASA Onera Wing," but I'm encountering issues with the preference method you suggested. Whenever I switch from CFF to legacy, I face difficulties opening CFD. The error message I received is: "Application error(s) occurred in CFD-Post. The run 'RunSteady' in simulation 'Simulation' contains transient output, but no output files were defined." However, when I switch back to CFF, CFD post opens successfully, but I am unable to visualize the pressure coefficient on the Y-axis in CFD post. This data is crucial for validating my ongoing research work, so I would greatly appreciate your assistance with this matter. I look forward to hearing from you soon.
Enjoyed the video, but what the heck is it that CFD people can’t make less than a 2 hour video! We have suffer through every single click, of every single dialog (multiple times), and every single web page reference, etc. etc. have you guys never heard of “an outline”, a “script” and preparation through organization and condensation (summary). It’s infuriating because there is lots of good info here but it’s separated by oceans of minutia! Show us an outline. Step through the outline (tell us what you are going to tell us), then tell it to us (NOT suffering through every click, but rather tell us there is a dialog for that, show it too us, briefly highlight key points and parameters on the dialog and move on. We don’t need to see you drawing and splitting spheres! Finally tell us what you told us, and the key,take always. With anything more than zero preparation you could have done the whole video in 10 minutes and not left out anything: 15 minutes tops. Here I am at half an hour and I got another half hour to go! Some of us do have a life!
Hey, was a perfect tutorial, wait' for more!!
Hi, it is an great tutorial it helped me during my engineering thesis in aeronautical engineering. One small note - when you are talking about surface of the wing - it is wing or just surface, not airfoil because airfoil is only 2D.
You made this very well man!
Appreciate your hard effort 😊
Great video! I’m using this to help learn CFD for my dissertation!
Your video is helpful Thanks!
Thank you, you're a lifesaver
Very helpful thank you so much
I only graduated high school lol but good content. I seen a post you made on fastlane forum. Keep at it. 👍🏽👍🏽
Great video! Why do u use 1.3146 for density in terms of preassure calculation? Why don't u use 1.148? Greetings
41:08 Can you please explain how to save the file in legacy format before exporting?
how you got the value of reynolds number without knowing the viscosity and just by knowing the mean chord length ? pls explain
HI,this is a very helpful video, thank you very much. I have a big annoying problem, I follow the video for meshing and parameter setting, but when I change the AOA to 6°, it doesn't converge
This is an annoying issue that sometimes occurs with difficult simulations. My recommendations in order of importance to fix the problem would be to
1. Check the boundary conditions thoroughly. It is often mistakes that leads to this problem
2. Change solver. Sometimes another solver is needed for different applications
3. Change the relaxation conditions in Ansys to support slower convergence but a more stable solution
4. Run with mulitple meshes to see if the problem consists
Hi, this is an excellent video tutorial on how to set-up a CFD simulation, thank you. I have encountered an annoying problem which I have been trying to solve for the past hours.
After I sketch the refinement rectangle around the airfoil and want to extend it, annoyingly, the whole solid disappears. Have you encountered this issue before? If so, do you mind sharing a solution to it? Kind regards.
Hi, no I have not encountered this problem but all I can suggest is that you take a look at what settings are on the extrude, ie if “merge bodies” is on then it might be merging the solid body with the fluid body
If there are any further issues, send on an email
@@cillianthomasengineering Thank you for your quick response and proposed solution. Believe it or not, I have managed to figure it out just now haha!
The solution was related to the “Add material” function of the extrude options. Switching up to “Add Frozen” solved the issue and I have managed to load it into Mechanical and generate a mesh!
Great to hear, best of luck with the rest of the tutorial!
Following report-plots are not valid:
report-def-0-rplot:
Contains following invalid reports:
report-def-0:
List of walls is blank
I'm getting this error can you help
Hi mate! Thats video was great help. Is it possible to do analysis for Mach 1 ?
Why is the pressure coefficient at 57.30 not visible? How can I fix?
Same here. would you solve it?
Hi, is there a reason why you subtract the airfoil body? will it affect the results if i keep it?
Hi, Thank you for your video. Can you share with us your formulation document.
How would you change the airfoil angle of attack?
Please how did you create the geometry
That's a good video. However, the student license only supported 512000 elements, so it was not possible to input physics properties. Instead, I did it with a simple geometry through this video. Thanks from Germany for your video.
Thanks Kwon. I did a 2D naca 4 digit tutorial for the student version since it is hard to do 3D with such few cells.
Did you get good results in the student version? Would be interesting to know for others if it is possible to still get good results with only 500K cells
@@cillianthomasengineering I limited the diameter of the sphere to 5m in order to meet the elements 500k limit, and proceeded with the task. Furthermore, the size of the elements was much larger than yours.
@@cillianthomasengineering Your result: drag 0.019198263, lift 0.25372967
Pressure coefficient: max. 0.75, min. -1
My result: drag: 0.02342472, lift: 0.24747622
Pressure coefficient: max. 0.69, min. -0.7
The pressure coefficient distribution graph is drawn similarly to NASA's graph as a whole.
@@cillianthomasengineering I think this is because my farfiled is much smaller than yours, has fewer elements, and is larger in size.
Could you please tell what changes did you make to incorporate this in student version ? like element size etc? thanks @@kwonkuhoon2304
I'm getting this error ‘’floating point excaption’’
How can ı this fix error
Hi, I found this video really helpful. However, i have encountered one issue. I am running ANSYS R19.2, i followed the exact same steps shown in the video and although i get practically the same results for Drag Coefficient and pressure coefficient, my lift coefficient is about 30% less than the one you find. Any suggestions?
hi i had the same result as you.
did you fixed it?
@@한화이글스-r7j unfortunately not
@@한화이글스-r7j unfortunately not
is it manadatory to do all the refinements (I have the student version)
I would recommend to do all refinements, as smal as the node limit will allow
Hi Cillian,
I watched your video, but I'm having trouble with the preference method you recommended. Every time I switch from CFF to legacy, I encounter an issue opening CFD. The error message I keep receiving is: "The run 'RunSteady' in simulation 'Simulation' contains transient output but no output files were defined." However, when I switch back to CFF, CFD post opens successfully, but I can't visualize the pressure coefficient on the Y-axis. This data is crucial for validating my ongoing research work, so your assistance on this matter would be greatly appreciated.
Hi Cillian,
I watched your video on the "3D Aerofoil Tutorial in ANSYS FLUENT - NASA Onera Wing," but I'm encountering issues with the preference method you suggested. Whenever I switch from CFF to legacy, I face difficulties opening CFD. The error message I received is: "Application error(s) occurred in CFD-Post. The run 'RunSteady' in simulation 'Simulation' contains transient output, but no output files were defined." However, when I switch back to CFF, CFD post opens successfully, but I am unable to visualize the pressure coefficient on the Y-axis in CFD post. This data is crucial for validating my ongoing research work, so I would greatly appreciate your assistance with this matter.
I look forward to hearing from you soon.
Enjoyed the video, but what the heck is it that CFD people can’t make less than a 2 hour video! We have suffer through every single click, of every single dialog (multiple times), and every single web page reference, etc. etc. have you guys never heard of “an outline”, a “script” and preparation through organization and condensation (summary). It’s infuriating because there is lots of good info here but it’s separated by oceans of minutia! Show us an outline. Step through the outline (tell us what you are going to tell us), then tell it to us (NOT suffering through every click, but rather tell us there is a dialog for that, show it too us, briefly highlight key points and parameters on the dialog and move on. We don’t need to see you drawing and splitting spheres! Finally tell us what you told us, and the key,take always. With anything more than zero preparation you could have done the whole video in 10 minutes and not left out anything: 15 minutes tops. Here I am at half an hour and I got another half hour to go! Some of us do have a life!