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Forum: CFX

December 27, 2011, 05:24

Replies: 6

cfx strange error

Views: 1,665

Posted By ghorrocks

Well, the e based turbulence model cannot have...

Well, the e based turbulence model cannot have epsilon=0 as the turbulent viscosity goes undefined. This is a key failing of these models and is why they cannot model low Re flows or transitional...

Forum: CFX

December 27, 2011, 05:07

Replies: 6

cfx strange error

Views: 1,665

Posted By ghorrocks

You cannot have epsilon = 0. It leads to a divide...

You cannot have epsilon = 0. It leads to a divide by zero error on the turbulent viscosity - ie a floating point error :) This does not sound surprising at all to me.

Forum: CFX

December 24, 2011, 04:38

Replies: 6

cfx strange error

Views: 1,665

Posted By ghorrocks

Is it a floating point error? If so then this...

Is it a floating point error? If so then this means your simulation has diverged. Need to improve numerical stability.

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