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Volume in fluent 2d

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Old   April 26, 2012, 08:59
Post Volume in fluent 2d
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NAD
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Hi.
when we use fluent 2D (2d or 2ddp), at the begining fluent display a statistics about volume and face area (minimum volume, maximum volume, total volume, minimum face area ....etc).
I want to ask: what represent the volume in this case????
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Old   April 27, 2012, 01:52
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Quote:
Originally Posted by NAD View Post
Hi.
when we use fluent 2D (2d or 2ddp), at the begining fluent display a statistics about volume and face area (minimum volume, maximum volume, total volume, minimum face area ....etc).
I want to ask: what represent the volume in this case????
these are just mesh metrics. volume would refer to cell volumes, etc.
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Old   April 27, 2012, 10:23
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LuckyTran, thanks for your reply.
in my question I meant what represent the volume in 2D?

regards
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Old   April 27, 2012, 11:30
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LuckyTran, thanks for your reply.
in my question I meant what represent the volume in 2D?

regards
When you create a 2D mesh, you're actually creating a 3D mesh with only 1 cell in the 3rd direction. Depending on the meshing tools, format, and the way the solver interprets it, the thickness of the cell in the 3rd dimension varies.

Hence, even for a 2D problem, there is still a 3D representation, with volumes and all. You can also think of it mathematically, 2D is just 3D with everything the same in one direction. It's not that a 2D problem only has 2 dimensions, just that the 3rd dimension is either ignored or treated differently.
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Old   April 28, 2012, 08:49
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LuckyTran,Hi.
I get it.
Thanks for these clarifications and explanations.
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Old   January 23, 2013, 19:42
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the volume of a 2d cell is simply the area of the cell multiplied by unit depth
so, for a cell with area A, it's volume V=A*1 m^3
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Old   January 23, 2013, 19:43
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the volume of 2d cell is the area of the cell multiplied by unit depth.
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Old   October 25, 2013, 04:00
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the volume of 2d cell is the area of the cell multiplied by unit depth.
Hi,

When i return the value of C_VOLUME(c,t), I get zero for a 2D mesh ! So how do we know the third dimension ?
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Old   October 25, 2013, 05:36
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Dear,

Fluent doesn't identify the Macro C_VOLUME(c,t) for 2-d mesh, you should instead use the cell area Macro to return the value of the cell area...then the volume of your cell will simply be the returned cell area multiplied by unit depth of 1m.
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Old   October 25, 2013, 07:02
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Originally Posted by hassansalem View Post
Dear,

Fluent doesn't identify the Macro C_VOLUME(c,t) for 2-d mesh, you should instead use the cell area Macro to return the value of the cell area...then the volume of your cell will simply be the returned cell area multiplied by unit depth of 1m.
I am sorry, I made a mistake while giving the cell and thread. Now, after revising, I get exactly A*1m as a return value for C_VOLUME(c,t).

Thank you, Salem.
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