Inlet velocity as a function of time. Transient analysis.

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 December 11, 2012, 08:58 Inlet velocity as a function of time. Transient analysis. #1 New Member   Christian Elgård Nielsen Join Date: Dec 2012 Location: Copenhagen, Denmark Posts: 4 Rep Power: 4 Hello, Does anybody know if it is possible to setup an inlet boundary with userdefined velocity as a function of time. What i would like to do is set the velocity to 0m/s for 0->1s and then 10m/s for 1->10s. Is it possible to set up a table, or in any other way define the velocity in a more advanced way? /Elgaard

 December 11, 2012, 09:01 #2 Senior Member   Lance Join Date: Mar 2009 Posts: 522 Rep Power: 11 Your example can easily be solved using an expression with step functions. For more advanced profiles see http://www.edr.no/blogg/ansys_blogge...nsient_profile (or search this forum...)

 December 11, 2012, 10:03 #3 New Member   Christian Elgård Nielsen Join Date: Dec 2012 Location: Copenhagen, Denmark Posts: 4 Rep Power: 4 Thank you. I am quite new to CFX, but this helped a lot. Found a manual for the CEL language, and got it to work. Manual: http://hikwww2.fzk.de/hik/orga/hlr/A...xpres_lang.pdf Expression: step(t*1[s^-1]-1)*10[m s^-1] /Elgaard

 December 12, 2012, 03:36 #4 Senior Member   Lance Join Date: Mar 2009 Posts: 522 Rep Power: 11 The manuals come with the installation, usually located at: C:\Program Files\ANSYS Inc\v140\commonfiles\help\en-us\pdf or by pressing F1 inside CFX.

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