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Time derivative of Integration coupling variables
Posted Feb 3, 2010, 5:59 p.m. EST 0 Replies
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Through the simulation, I defined a boundary integration variable defined over a specific boundary (Integration coupling variable section). I need to calculate time derivative of this variable.
After transient solution of the problem, I check the aforementioned variable in cross section plot parameters (pint plot). It represent as it is expected (sinusoidal form with time). Then I calculate it’s time derivative (Diff(MyVar,t)). Surprisingly, I get just zero line over the time period.
I have another variable defined as subdomain integration variable defined over a specific subdomain. The time differentiation of it works perfectly in the same model.
Would you please help me in this case?
How shall I get the time derivative of this variable?
Hello Pouya Hajiani
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