Ansys Fluent: Moving Wall On A Water Tank Using Dynamic Mesh.
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- Опубликовано: 20 авг 2024
- This video shows how to simulate a 2D multiphase fluid (air and water), driven by a moving wall with a sinusoidal movement.
This is de UDF i used:
#include "udf.h"
DEFINE_CG_MOTION(moving_wall,dt,vel,omega,time,dtime)
{
real t = CURRENT_TIME;
NV_S (vel, = , 0.0);
vel[0] = 0.35*3.1415*cos(3.1415*t);
}
#Ansys #AnsysFluent #CFD #AutoDeskInventor
Hi, thank you for sharing your experience, it is very amazing. I have tried the method on my simulation which is a 3D model, but it did not work. Can you help me?
Hi, Nice work. I have some questions,
i. What are the boundary conditions on the wall? (no slip, slip)
ii. What are the mesh size on and around the wall?
7:32 dynamic mesh zone
Hi, great video thank you for sharing. Quick question, in your UDF, does 0.35 represent the amplitude or the max velocity? thanks :)
amplitude
can you help with a conventional gearbox... simple transmission of 2 gears
Hi, thanks to u, very impressive! I think the moving wall is moved due to linear motion (here sinusoidal motion) am i rite? What about if the wall move due to force or pressure? Like in syringe motion due to force applied.
That actually would be interesting, I'll keep it in mind for future videos
HELLO, I AM FACING NEGATIVE CELL Volume detected, how to fix it please
hi, tqvm. I try to emulate the steps. However, after conversion from 3D to 2D in DM (previously, I used Spaceclaim to create thickness) and updated the system, Mesh was unable to tag the geometry. What should I do? At present I used student version 2021R2. Pls help. Thank you!
This is one of those times where my bad english comes into play, What do you mean by 'unable to tag the geometry'?
@@fluentsetup1232 there was no geometry exported to mesh..it was unable to process after conversion of 3d to 2D
Check if the 2D geometry you created is in the XY plane, if it isn't the program won't process it. That would be my first guess.
Thank You for the video, Can you please help me in compiling the UDF ? I am getting an error.
Error: The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform (win64).
The system cannot find the path specified.
G:\Moving wall\case 1_files\dp0\FFF\Fluent\libudf\win64\2ddp_host\libudf.dll
Error Object: #f
This may sound like a silly question but it is a common mistake: Did you press the 'build' and 'load' buttons like it's shown in the video?
@@fluentsetup1232 yes I did. It seems like there is some setup issue.
Can you share the code UDF ???
Just added it to the video description!
hey, how are you? its possible to contact you via mail? i have a couple of questions about the UDF, how to create and how to manage for another equations and situations, thank you for ur help :)