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Heat flux through a boundary
Posted 02.05.2015, 03:29 GMT-4 Fluid & Heat, Heat Transfer & Phase Change Version 5.0 1 Reply
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Hi guys
Ive been roughly following this tutorial to model a heat exchanger www.youtube.com/watch?v=7U5ue03K7gQ
Using different geometry and BC's
It uses the expression intop1(nitf.qwf_u) to calculate the total power exchange
Im having some trouble getting this to work in my model, I understand that intop1 means it is integrating nitf.qwf_u over the boundary but I just dont know what nitf.qwf_u means and what the equivalent in my model would be.
Any help is appreciated
Thanks
Ive been roughly following this tutorial to model a heat exchanger www.youtube.com/watch?v=7U5ue03K7gQ
Using different geometry and BC's
It uses the expression intop1(nitf.qwf_u) to calculate the total power exchange
Im having some trouble getting this to work in my model, I understand that intop1 means it is integrating nitf.qwf_u over the boundary but I just dont know what nitf.qwf_u means and what the equivalent in my model would be.
Any help is appreciated
Thanks
1 Reply Last Post 02.05.2015, 04:18 GMT-4
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Posted:
10 years ago
Hi
turn on the equation view and check the description of the variable, there are so many that I cannot tell you exactly what that one does, but I suspect that the last "u" could indicate its along the X direction, in which case, if your surface is not normal to the "x" direction your results is not the total flux but only one component. Normally the flux one integrate is the normal flux, hence the dot product of the surface normal and the flux variable components
--
Good luck
Ivar
turn on the equation view and check the description of the variable, there are so many that I cannot tell you exactly what that one does, but I suspect that the last "u" could indicate its along the X direction, in which case, if your surface is not normal to the "x" direction your results is not the total flux but only one component. Normally the flux one integrate is the normal flux, hence the dot product of the surface normal and the flux variable components
--
Good luck
Ivar