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Old   June 14, 2004, 07:26
Default Airpak
  #1
leung
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Hi all

Could anyone tell me how the accuracy of the "Indoor zero equation" solver in airpak for ventilation problem? As i know, once the solution is intilaized, airpak will use the solver engine of fluent to solve the problem, but it is stated that the "indoor zero equation" is corresponded to the laminar flow model in Fluent?

Thank all

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Old   June 16, 2004, 12:21
Default Re: Airpak
  #2
walter
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airpak uses fluent as its solver engine and can utilize an indoor zero equation turbulence model which also resides in the fluent software; however, the indoor zero equation turbulence model is not exposed as a standard feature of fluent and is not accessible via fluent graphical user interface. if someone reads an airpak-generated case file into fluent, the fluent graphical interface does not recognize the indoor zero equation turbulence model and will indicate "lam" in the caption window ... this only means that the graphical user interface for fluent does not support this model ... the actual calculations by the solver will use the turbulence model selected in airpak.

i don't think anywhere you will find the words you mention above " ... it is stated that the "indoor zero equation" is corresponded to the laminar flow model in Fluent"
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Old   June 17, 2004, 16:24
Default Re: Airpak
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AE
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Very interseting indeed, indoor zero eqn looks as laminar, I dont agree that fluent's gui does not support this turb model, if there existed such a model, it would be accessible from the text user interface even if we could not see on the gui. Fluent has mixing-length turb model as the zero eqn turb model but there aint any other zero eqn model, like indoor zero eqn..

regards AE
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Old   June 23, 2004, 11:03
Default Re: Airpak
  #4
walter
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believe me, the model exists and it is in there. the software is more complex than you realize.
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