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#1 |
New Member
Join Date: Feb 2012
Location: Nantes
Posts: 14
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Hi All,
I need some help with the CFX functions. I would like to run a transient simulation by reading a csv file every time step. Until now, I was computing only steady state by reading .csv files which look like: [Data] x [ m ],y [ m ],z [ m ],Velocity [ m s^-1 ], Temperature [ K ]... 0, 1, 15, 5, 284.211 1, 2, 15, 1, 284.55 ... My User functions look like: LIBRARY: CEL: &replace FUNCTION: Top Argument Units = [m], [m], [m] File Name = myPath/Top.csv Option = Profile Data Profile Function = On Render Type = Points Spatial Fields = x, y, z DATA FIELD: Temperature Field Name = Temperature Result Units = [K] END DATA FIELD: Velocity Field Name = Velocity Result Units = [m s^-1] END END Now i would like to switch to transient simulations and read a file for every time step (delta t=1s). Does someone has a Tipp how to do that? My first idea was to change in the csv files my x,y,z with x,y,t as my boundaries can be defined with only 2 coordinates. The input file become: x [ m ],y [ m ],t[ s ],Velocity [ m s^-1 ], Temperature [ K ]... 0, 1, 0, 5, 284.211 1, 2, 0,1, 284.55... 0, 1, 1, 5, 284.211 1, 2, 1, 1, 284.55... Do you have an idea how to read the new files by doing an interpolation with respect to time? Thanks in advance! |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,816
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First of all - if the function is known in advance it can be entered as a CEL expression. But I assume the function is complex enough that this is not practical.
I think you are going to have to do write a user fortran function to do this. Have a look at the example user fortran examples in the CFX documentation on how to do this.
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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#3 | |
Senior Member
Lance
Join Date: Mar 2009
Posts: 669
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