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how to use Prev(.) function during simulation? How to write FOR loop in comsol for simulation?

Posted 20 sept. 2020, 06:02 UTC−4 Computational Fluid Dynamics (CFD), Microfluidics, Simulation Apps Version 5.5 1 Reply

Krishnayan Bhattacharyya
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Hi, Can you please help me out in using prev function to get back the dependent variables from last time step and use those in current timestep during simulation? in simply words how to make comsol work in For loop for certain dependent variables. my problem: theta(1)=0; for i=2:t { xA=c1-bsin(theta(i-1)); yA=c2+bcos(theta(i-1)); m=2(c1yA+c2xA); n=2(c1yA-c2xA); q=2xA^2+2yA^2+c1^2+c2^2-b^2; W=arccos(m/sqrt(m^2+n^2)); theta(i)=arccos(q/sqrt(m^2+n^2))-W; } end

How to write this FOR loop code in comsol? or is there any other ways to do the same task?

1 Reply Last Post 20 sept. 2020, 06:55 UTC−4
Edgar J. Kaiser Certified Consultant
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Posted: 4 years ago 20 sept. 2020, 06:55 UTC−4

Check this blog contribution: https://www.comsol.de/blogs/using-the-previous-solution-operator-in-transient-modeling/

Cheers Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Check this blog contribution: https://www.comsol.de/blogs/using-the-previous-solution-operator-in-transient-modeling/ Cheers Edgar

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