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why the inlet velocity magnitude differrent from the value i initialize?

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Old   August 27, 2012, 09:38
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  #21
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Touré
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I can't see the xyz coordinates of the second image from FLUENT. It's not clear because it's too small.
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Old   August 28, 2012, 01:56
Default coordinates in gambit&fluent
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hhh
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dear toure, please find the attached fluent image2
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Old   August 28, 2012, 06:12
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Nothing has changed except the view. You can change the view at Display -> View or use the mouse to turn it.
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Old   August 28, 2012, 08:44
Default coordinates in gambit&fluent
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Dear toure, thanks for kind response

1)In gambit & fluent both are default x is right, y is up & z is horizontal, according to my problem, For my actual geometry purpose, i select coordinates is x is towards right, y is horizontal & z is downwards if i choose default x is right, y is up & z is horizontal in gambit my wing looks up, but actual geometry my wing looks bottom thats why i choose coordinates is x is towards right, y is horizontal & z is downwards in gambit i didn't select default.

2) After i import in fluent, its take default coordinates in fluent, it will not change according to gambit coordinates, how i can change my coordinates in fluent according to my gambit coordinates? that's is my doubt. what i feel is In fluent may be some -/+ sign problem will occur in boundary condition or other condition like velocity inlet due to this coordinates.

3) If both gambit&fluent default coordinates means its okay.

4) if u didn't understand you take any 3D problem change coordinates(ie different view in gambit) and do your meshing in gambit, then see in fluent how the xyz coordinates changing.It will not give same coordinates in fluent as in gambit. please help me
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Old   August 30, 2012, 18:55
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I am not familiar to Gambit but the change of view doesn't have any effects on the coordinates. If you have any point A of coordinates (xA, yA, zA) you flip it in Gambit or Fluent, it will still the same A(xA, yA, zA). You can check the dimensions of the domain in FLUENT (Mesh -> Scale).
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Old   August 31, 2012, 02:30
Default coordinates in gambit&fluent
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Dear toure,
thanks a lot for giving your kind response for my queries.
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Old   April 20, 2015, 21:34
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Dear sir

I am trying to compress the fluid inside the cylider as 2D axi-symetric partially premixed model
I am not getting pressure rise... infact pressure initially very low may be not sufficient fuel mixture...
Can u tell how to input the mass / or quantity for cell-zone type
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File Type: jpg Referance mesh needed.jpg (35.9 KB, 0 views)
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