|December 20, 2010, 01:43||
Join Date: Jul 2010
Posts: 42Rep Power: 7
I want to use the following expression in inlet boundary condition:
where omega,Pmax are defined.
But I get the following error:
Bad expression value 'Pin' detected in parameter 'Relative Pressure' in object '/FLOW:Flow Analysis 1/DOMAINefault Domain/BOUNDARY:Inlet/BOUNDARY CONDITIONS/MASS AND MOMENTUM'.
The dimensions of the argument to function 'step' are inconsistent with expected dimensions.
Argument dimensions resolve to 's'; expected '<dimensionless>'.
|December 20, 2010, 03:20||
Join Date: Mar 2009
Posts: 532Rep Power: 11
Your step functions need to be dimensionless, just as the error says.
Change step(t-0.02) to step((t-0.02[s])/1[s]) for example.
|December 20, 2010, 03:41||
Join Date: Dec 2010
Posts: 2Rep Power: 0
Yes, Lance is right! Wherever you have something that has a dimension in your expression, you need to divide it for its dimension unit. So, wherever you have time, you need to divide by 1 [s].
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