# Calculating Cell Sizes Using FLUENT Macros

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 October 8, 2012, 23:08 Calculating Cell Sizes Using FLUENT Macros #1 New Member   anonymous Join Date: Oct 2012 Posts: 2 Rep Power: 0 Hello everyone, I am trying to write a UDF for a source term in FLUENT. This term is scaled by a constant that is dependent on the scalar product of the cell size vector L = (dx,dy,dz). All I can seem to find is C_VOLUME(c,t), I am assuming FLUENT uses L in some form to calculate cell volume but I may not have access to it. This needs to be able to work for both uniform and non-uniform grids. If anyone knows of a way to calculate this within FLUENT please respond. Thanks!

October 9, 2012, 00:11
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 Originally Posted by bryankelly Hello everyone, I am trying to write a UDF for a source term in FLUENT. This term is scaled by a constant that is dependent on the scalar product of the cell size vector L = (dx,dy,dz). All I can seem to find is C_VOLUME(c,t), I am assuming FLUENT uses L in some form to calculate cell volume but I may not have access to it. This needs to be able to work for both uniform and non-uniform grids. If anyone knows of a way to calculate this within FLUENT please respond. Thanks!
First, I think your cell should be a orthogonal hexahedron cell.
Then you can get the edge length with "cell volume/face area".

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