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How to get the derivative of a force with respect to a self defined variable?

Posted May 20, 2012, 10:47 p.m. EDT Results & Visualization, Studies & Solvers Version 3.5a 0 Replies

Long Luo
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Hi All,

I am working on a simulation of a particle moving in water.

The particle moving velocity is V and its value is 0.01m/s, which we can define as a moving boundary condition.

Then COMSOL can calculate the hydrodynamic force (F) on the particle by integrating the hydrodynamic tensor (for example,T_z_chns and T_r_chns in a 2D axisymmetric geometry).

But, question is how I get the derivative of F with respect to V?

I guess coupled variable in comsol should be used as well as matlab.

Any experts can help me out?
0 Replies Last Post May 20, 2012, 10:47 p.m. EDT
COMSOL Moderator

Hello Long Luo

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