In reply to Hua Li.

I am a COMSOL employee, so I do not use other tools. https://www.comsol.com/model/98011 performs topology optimization of heat conduction coupled to laminar flow in 2D. Extension to 3D is conceptually trivial, but in practice one has to use iterative solvers, possibly on a cluster.

Another question, please, I also want to extend this kind of topology-optimization to 3D problem. Have you ever topology-optimized the heat conduction coupling laminar flow with COMSOL? Or maybe you use other tools?

In reply to Kristian Ejlebjærg Jensen.

Thanks so much for your reply, I will take a look at the case and check my settings again.

In reply to Hua Li.

You probably chose interpolation functions which caused that design to become a (local) optimum. It is possible that you can benefit from taking a look at https://www.comsol.com/model/98011.

May i ask you a question? i make a try to topology-optimize a kind of heat-exchanger(heat conduction coupling laminar flow),but in my topology-optimized result, the liquid domain didn`t connect with each other,even the inlet is full of solid material. i`m confused, have you ever encountered such a problem？how to deal with it?