Recent content by 1lai

All done. Thanks.

Could you please show me how to apply BC, for example, a sawtooth heat or a heat impulse, using "if" sentence? Thanks.

I guess everything is OK now for the stationary analysis using the heat transfer coefficient w/o integration. The results fit reasonably with some of our experimental data. We did vacuum packaging of our MEMs device and measure its time constant for estimating the vacuum level inside the...

I have a 3D model. The heat transfer from the model to ambient is propotional to the surface area of the model. It seems the total amount of heat should be integrated, or I can issue an expression of h=C1*ux*uy. however, COMSOL does not know "ux" or "uy". What are the right symbols for...

Thanks a lot. I chose the right model (heat transfer-conduction is different from heat transfer-conduction and convection) and set the boundary condition according to your suggestion and it worked. however, to best define the boundary condition, I should specify h=C1*A where h is the heat...

Hi PerennialII, At this moment, I want to solve a simple problem using a only pressure-dependent, average heat transfer boundary condition. Since I am not very familiar with Comsol, could you please teach me how to tell the model an additional thermal conductive path to the ambient? Thanks...

My COMSOL model consists of a suspended membrane supported by two arms. At low pressure, the membrane temperature will increase upon thermal irradiation. I want to simulate the temperature rise as a function of pressure but don't know how to include the gaseous conductance. Any suggestion...