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Forced Convection: 2D fan (forced air flow source)

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Old   March 17, 2014, 09:34
Default Forced Convection: 2D fan (forced air flow source)
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Dear all,

I am solving a 2D axisymmetry problem.
I am considering a closed surface (an enclosure with prescribed temperature) with several heat sources inside and a small air flow source.

The air flow source should stand for a fan blowing air axially (maybe I will impose a certain angle but not now).

I know the problem is not axisymmetric since the fan source is not along the problem axis, but for me is ok.

Up to now my fan is basically a rectangle with:
.fan sides = walls with 0 heat flux
.fan outake = mass flow inlet (I am considering mass instead of velocity or pressure jump)
.fan intake = pressure outlet (to leave the flow be sucked feely as a fan intake)

This problem can be run with transient solver but, neither steady state nor pseudo transient work, AMG divergence..

please, could anybody help me?
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