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Until now conducted the simulation with the Boussinesq Model for not transitory simulation. Now i would check the results comparing them with the same results of a transitory simulation. For the density variation which parameters i have to set? Thanks again.

ok, so if my Ra and Gr numbers indicate a laminar flow the right viscous model is the laminar, right?

Besidees changing the viscous model from standard k-epsilon to laminar the final temperature distribution change so much (15 °C)- I shoud use the laminar model , right? Thanks again

Dear L_K thanks for the reply. There isn't any forced convection. The heat sink is inside an air enclosure. Below i post the picture. The ambient temperature is 26 °C and i want understand how much is the effect of a natural air convectioni for the Heat sink temperature distribution. Clearly...

Hi, I'm dealing with an heat sink in an air enclosure. Attached to the heat sink there's a chip with an internal heat source. I'm setting the Fluent model with the "laminar" behaviour for really low Reynolds number. My target is understand how much is the influence of natural convection on the...

Hi, I'm dealing with an heat sink in an air enclosure. Attached to the heat sink there's a chip with an internal heat source. I'm setting the Fluent model with the "laminar" behaviour for really low Reynolds number. My target is understand how much is the influence of natural convection on the...

Hi Rick, workbench!!

Hi, I'm making a thermal simulation through Ansys on a box and I converted it to midsurface box. I would apply inside the box an air convenction and outside a fixed temperature. How can I apply both conditions on the same midsurface? Consider that I'm not able to select the opposite surfaces of...