Would you mind if I ask you about the turbulent natural convection inside a cavity filled by a pure fluid (air). Could you help me please how can I write the turbulent dynamic viscosity of the k-e model in the thermal conductivity place of the heat equation by using the user defined?

Thanks and best wishes.

Basil Srayyih.

I want to analyze a flow in a geometry exactly the same as one shown in the last figure that shows the wall lift-off in a viscous unit.

What is the name (or defining terms) of that geometry or the type of flow that can be searched for in research articles?

thanks,

]]>I want to simulate lightning induced voltages on power systems by Comsol can you guide me that how can i do that? ]]>

I believe that what you’re asking about here is a mesh refinement study:

https://www.comsol.com/multiphysics/mesh-refinement

Thank to Comsol for updating the turbulent models, the new models in v.5.0 are very stable and fast to solve time-dependent response. ]]>

Failed to evaluate variable.

- Variable: mod1.epx

- Geometry: 1

- Domain: 2 3 4 5

and all domains 2 3 4 5 are solids ?

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