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June 5, 2007, 11:12
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about expression
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#1 |
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Guest
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Hi,all In the Inlet table,I choose to set "Static pressure".Now I want use an expression, the pressure=15000*t, t is time. How should I set the unit? I has tried many time and it doesn't work. Please do me a favor. Thanks in advance. Jason
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June 5, 2007, 11:20
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Re: about expression
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#2 |
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Guest
Posts: n/a
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If just set like this: Inlet pressure=15000*t,the warning come out as followed: Expression resolves to invalid units ('s') in value set for parameter 'Relative Pressure' in object '/FLOW/DOMAINomain 1/BOUNDARY:inlet/BOUNDARY CONDITIONS/MASS AND MOMENTUM'. Expected units: 'kg m^-1 s^-2'.
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June 5, 2007, 11:21
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Re: about expression
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#3 |
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Guest
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Pressure has to be in Pa. t is in [s]. So your constant 15000 has to be [Pa/s]. How difficult can it be?
Gert-Jan www.bunova.nl |
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June 7, 2007, 05:15
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Re: about expression
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#4 |
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Guest
Posts: n/a
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I Agree!
Or another way of doing it: 15000 [Pa] * t/1[s] -Dr Flow Squad |
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