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Limiting Dependent Variable

Posted Aug 11, 2020, 1:44 p.m. EDT Structural & Acoustics, General, Computational Fluid Dynamics (CFD) Version 5.5 2 Replies

Mahyar Abedi
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Hello I am trying to solve a system of PDE equations. Among the dependent variables of this system, there is a variable that changes from 0 to 1. I was wondering if I could do that in COMSOL?

2 Replies Last Post Aug 12, 2020, 4:24 a.m. EDT
Pu
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Posted: 4 years ago Aug 11, 2020, 9:31 p.m. EDT

You can try to set a penalty. I saw some discussion on penalty but unfortunately forget where it is.

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ZHANG, Pu
School of Physics,
Huazhong University of Science and Technology
You can try to set a penalty. I saw some discussion on penalty but unfortunately forget where it is.
Henrik Sönnerlind COMSOL Employee

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Posted: 4 years ago Aug 12, 2020, 4:24 a.m. EDT

Use the segregated solver. If you right-click on the Segregated node, you can add Lower Limit and Upper Limit. This will force the dependent variable to stay inside limits.

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Henrik Sönnerlind
COMSOL
Use the segregated solver. If you right-click on the **Segregated** node, you can add **Lower Limit** and **Upper Limit**. This will force the dependent variable to stay inside limits.

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