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how to set a if condition in chemical reaction flow?
Posted 17 juil. 2020, 03:03 UTC−4 Fluid & Heat, Chemical, Chemical Reaction Engineering 0 Replies
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Hi,
This is a starter of COMSOL.
I'm calculating a chemical recation with the solution flowing through a thick porous media in one dimention x.
I want to set a condition to define: only when the flow arrives position x, the reaction occurs, else the the reaction rate r(t)=0.
the following is my setting:
if(t*u(t,x)>0,r(t),0),
where t is time, u(t,x) is the velocity field,r(t) is the reaction rate,
but it fails.
Thank you for your help.
Hello Shuaitong Liang
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