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If statement in Deformed Geometry
Posted Aug 1, 2016, 5:53 p.m. EDT 2 Replies
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Does anyone happen to know if an "if statement" (conditional statement) can be used in the deformed Geometry for prescribed mesh displacement? Meaning, using the CFD module, the deformed geometry only changes the locations where a certain value of the solution is violated.
For example, for dy in prescribed mesh displacement in Deformed Geometry interface, what would be the correct syntax for to requiring that the geometry only changes if wall shear stress (wss) is less than 0.076 Pascal.
We used: if(wss<=0.076[Pa],DT1), where DT1 is a Bernstein basis function we defined in the global variables. "wss" was also defined in definitions. Seems like we're missing at least one argument in the parentheses. Can COMSOL even make sense of this?
For example, for dy in prescribed mesh displacement in Deformed Geometry interface, what would be the correct syntax for to requiring that the geometry only changes if wall shear stress (wss) is less than 0.076 Pascal.
We used: if(wss<=0.076[Pa],DT1), where DT1 is a Bernstein basis function we defined in the global variables. "wss" was also defined in definitions. Seems like we're missing at least one argument in the parentheses. Can COMSOL even make sense of this?
2 Replies Last Post Aug 2, 2016, 3:54 p.m. EDT
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Posted:
8 years ago
We used: if(wss<=0.076[Pa],DT1), where DT1 is a Bernstein basis function we defined in the global variables. "wss" was also defined in definitions. Seems like we're missing at least one argument in the parentheses. Can COMSOL even make sense of this?
The if-operator has the following syntax: if(condition, true_branch, false_branch). You seem to only have supplied the true branch; try if(wss<=0.076[Pa],DT1,0).
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Posted:
8 years ago
Thank you for your help!