[Alex 0122]

Hello everyone,

I'm new to dynamic calculation in CFD and for a school project I need to simulate the flow around a Savonius wind turbine using Fluent. In order to do so, I initialise the simulation with a steady flow and then use a UDF function in a transient flow but then, when I launch the simulation I get this error message 'Update-Dynamic-Mesh Failed. Negative cell volume detected'. I already tried to reduce the time step size and checked the mesh and the UDF file for any flaws but nothing. Does anyone have an idea to solve this issue ?

Many thanks.

[maverick123]

Hi,

First do mesh/check .
It should detect negative volume cell. Then try to fix that problem with
/mesh/repair-improve repair or try many other options from repair menu.

If problem still exists, then you have to improve mesh in mesher only.

Regards

Originally Posted by Alex 0122

Hello everyone,

I'm new to dynamic calculation in CFD and for a school project I need to simulate the flow around a Savonius wind turbine using Fluent. In order to do so, I initialise the simulation with a steady flow and then use a UDF function in a transient flow but then, when I launch the simulation I get this error message 'Update-Dynamic-Mesh Failed. Negative cell volume detected'. I already tried to reduce the time step size and checked the mesh and the UDF file for any flaws but nothing. Does anyone have an idea to solve this issue ?

Many thanks.