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Defining step function as PDE coefficients term

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Hello everybody,

I am trying to build a model in COMSOL made by four different PDE to simulate heat and mass diffusion inside a porous material. I need to build the model myself to validate results from literature as well as modify some terms for other needs.

I have already defined the equations, however I do have a small difficult to understand how to integrate functions as coefficients.

In particular, I would need to define such function as show in image

step

I am not sure how to define the function itself, but also how to use as VARIABLE of the step function one of the PDE variables.

I hope you can help me out with this!


0 Replies Last Post 28 gen 2022, 06:38 GMT-5
COMSOL Moderator

Hello Daniele Usai

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