Ansys Fluent: Rotating Turbine Under Water

Simulation of 2D flow with a turbine rotating under water.
This is the UDF:
#include "udf.h"
DEFINE_CG_MOTION(vel_udf,dt,vel,omega,time,dtime)
{
NV_S(vel, =, 0.0);
NV_S(omega, =, 0.0);
omega[2] = 200.0;
}
#Ansys #AnsysFluent #CFD #AutoDeskInventor.

[@WananimationOfficial]

Hi, a quick question. I am doing a turbine propeller installed in a vertical pipe, a 3D simulation. At result, the propeller did not spin. Is it something to do with the UDF things in your video at 7:00 ? and Do I have to install the udf from browser?

[@fluentsetup1232]

It probably has something to do with the udf. I'll see if I can add i to the description of the video.

[@fluentsetup1232]

There it is

[@vivejk4443]

hey, did you solve your problem? can you tell me if you got some error message?

[@arunprayog7986]

@@fluentsetup1232 I need ur help ,could you please help me out

[@siwanedi2243]

i have problem "Warning: incorrect cg motion UDF vel_udf on zone 7 (assuming no motion)" whay like that?

[@AdeIrmaPuspitaGICI]

Hello, i have a questions, how do i insert a UDF file and where to create it? Is it in the note pad??

[@bimabv754]

yes please ansorrr

[@rashedbahrami2119]

Hi
I try that exactly but when i run, dynamic meshsh failed:Negative Cell Volume Detected in Dynamic Meshing
What i have to do for fix it ?

[@fluentsetup1232]

Hi, that error usually means the mesh moved too far in one direction and it ended up collapsing. The most general advice would be to reduce the time step in half, so the mesh has more opportunities to update itself. Also, you could plot the mesh so you can see exactly what is going on.
Hope that helps

[@darwindevasia8063]

Hi, im getting unbound variable error when i place the turbine in the middle, what am i doing wrong?

[@SridharSahoosid]

Did you solve the issue, How to approach, when the wheel is between two fluid.

[@alvinmubarok7289]

Hello I've tried for udf, why is it still error? Where do you think the error came from?

[@vivejk4443]

what error you are getting?

[@alvinmubarok7289]

@@vivejk4443 Oh, sorry. My error occurred because I placed the wheel between 2 fluids

[@SridharSahoosid]

​@@alvinmubarok7289 How to approach, when the wheel is between two fluid.