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I have a problem with the sign of mass flow rate Enthalpy |
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June 6, 2010, 18:02
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I have a problem with the sign of mass flow rate Enthalpy
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Member
Behrang Asgharian
Join Date: Oct 2009
Posts: 38
Rep Power: 16  |
I put some Lines (from the menu 'surface-line') on my model in order to monitor the enthalpy flow rate. I use the flow rate integral which is
integral of rho*h*u.dA the absolute values are OK but the sign is negative when it must be positive. I think this has got something to do with the inner product of u.dA. Does anybody know how I should define the monitor line in order to get positive enthalpy flow rates? By the way, if I use 'surface-rake' instead of 'surface-line', what will happen? Thanks Behrang |
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