Learning Forum

[RyMor]

Hello, 

Just looking for some clarification about defining relative viscosity when defining the porous zone.

Currently within the model I am working on (essentially Darcy governed flow of air upwards through a high temperature porous medium with the energy model enabled) I have set the relative viscosity to 1, such that the effective viscosity is equivalent to the fluid viscosity.

I am wondering in what general scenarios would one use either of the Brinkman Correction, Einstein Formula, or Breugem Correlation?

Thanks in advance for the help!

 

[Amine Ben Hadj Ali]

It does depend on the rock or the porous structure in which the medium is flowing affecting the momentum diffusion. I would check the paper referenced in Fluent and quantify the differences between the approaches.