How to add terms in Turbulence model k-e in COMSOL?

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I have practiced topology optimization for laminar flow in COMSOL, and there is no problem with this model. I want to add the penalty term as suggested in the paper "Topology optimization method with finite elements based on the k-ε turbulence model" because my project relate to turbulent flow (gas turbine internal cooling) Could someone guide me on how to add the penalty terms for Eq. (11) and (12) as shown:

0 Replies Last Post Oct 29, 2020, 12:17 AM EDT
COMSOL Moderator

Hello Kirttayoth Yeranee

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