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

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 August 27, 2012, 09:38 #21 Member   Guiliguili Join Date: Aug 2010 Location: Montréal Posts: 95 Rep Power: 9 I can't see the xyz coordinates of the second image from FLUENT. It's not clear because it's too small.

August 28, 2012, 01:56
coordinates in gambit&fluent
#22
Senior Member

kunar
Join Date: Nov 2011
Posts: 117
Rep Power: 8
dear toure, please find the attached fluent image2
Attached Images
 image2.png (27.7 KB, 5 views)

 August 28, 2012, 06:12 #23 Member   Guiliguili Join Date: Aug 2010 Location: Montréal Posts: 95 Rep Power: 9 Nothing has changed except the view. You can change the view at Display -> View or use the mouse to turn it.

 August 28, 2012, 08:44 coordinates in gambit&fluent #24 Senior Member   kunar Join Date: Nov 2011 Posts: 117 Rep Power: 8 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

 August 30, 2012, 18:55 #25 Member   Guiliguili Join Date: Aug 2010 Location: Montréal Posts: 95 Rep Power: 9 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).

 August 31, 2012, 02:30 coordinates in gambit&fluent #26 Senior Member   kunar Join Date: Nov 2011 Posts: 117 Rep Power: 8 Dear toure, thanks a lot for giving your kind response for my queries.

April 20, 2015, 21:34
#27
Member

sanjeet Limbu
Join Date: Mar 2015
Posts: 91
Rep Power: 4
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
Attached Images
 PDF creation.jpg (72.2 KB, 0 views) Temp and Presuree.jpg (22.9 KB, 0 views) mixture fraction and variance.jpg (21.7 KB, 0 views) Referance mesh needed.jpg (35.9 KB, 0 views)

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