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negative cell volume error in fluent

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Old   February 21, 2015, 16:44
Default negative cell volume error in fluent
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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.
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Old   February 23, 2015, 02:41
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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

Quote:
Originally Posted by Alex 0122 View Post
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.
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