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How to set the Heat Flux boundary condition at Outlet

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Old   September 21, 2011, 02:58
Default How to set the Heat Flux boundary condition at Outlet
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creddy
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Hi,

I am trying to model the gas-stirred vessel....where gas injected from the nozzle located at the bottom of vessel consisting of liquid metal...so I am using Degassing boundary condition at the top of vessel which allows gas to escape and acts as a free slip wall to liquid metal (which is not allowed to go out)...

Here I am solving the Thermal Energy equation for only liquid metal.

I want to specify the heat flux boundary condition for liquid metal at the outlet boundary...So I am specifying it using the source for the Energy equation...but in CFX Post when I am checking the results...it is not showing the correct heat flux which I applied initially....


Can some one tell me is it right way to specify the Heat Flux BC at outlet (Degassing BC)...

Here I am attaching the CCL file of outlet BC.

FLOW:
DOMAIN: Default Domain
BOUNDARY: top
Boundary Type = OUTLET
Interface Boundary = Off
Location = TOP
BOUNDARY CONDITIONS:
FLOW REGIME:
Option = Subsonic
END
MASS AND MOMENTUM:
Option = Degassing Condition
END
END
BOUNDARY SOURCE:
FLUID: M Steel
SOURCES:
EQUATION SOURCE: energy
Flux = -12500 [W m^-2]
Option = Flux

END
END
END
END
END
END
END


Thanks in advance.

Regards,
Niranjan Reddy.
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Old   September 21, 2011, 06:53
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Looks OK. Your flux will not appear in the heat flux in the results file, you will have to see its effects on the metal (ie heating or cooling it).
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Old   September 21, 2011, 06:59
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Thanks Glenn ...the effect of flux is shown at the end of solver file....but it is not shown in the CFX-Post....(i.e. wall heat flux or heat flux).
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Old   September 21, 2011, 07:44
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Yes, that is correct I think. Been a while since I checked it but it sounds right.
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