Export transient results from solver

joggis · March 4, 2016, 14:24

Hi,

I am doing large transient simulations (10k + timesteps) and was wondering if it was possible to get the solver to calculate some values and export them for every timestep?

I am doing multiphase simulations and want the solver to export the volume fraction of one of the phases in the default domain for each timestep.

I want to use the data to plot volume fraction against time, I am now doing this in CFX-post but it takes forever to calculate (1 hour ++++). If it was possible to get the solver to just write the values to a csv file or something that would be great.

Also, is it possible to set stop criteria for the simulations? So that the solver runs until the volume fraction of a phase is less than a given value?

Thanks for the help

ghorrocks · March 5, 2016, 06:05

This is very easy - just use a monitor point defined with a CEL expression. volumeInt(Phase1.vf)@domain or something like that.

Stop criteria - have a look at termination criteria in the CFX documentation.

March 4, 2016, 14:24	Export transient results from solver	#1
joggis New Member Anonymous Join Date: Oct 2015 Posts: 4 Rep Power: 12	Hi, I am doing large transient simulations (10k + timesteps) and was wondering if it was possible to get the solver to calculate some values and export them for every timestep? I am doing multiphase simulations and want the solver to export the volume fraction of one of the phases in the default domain for each timestep. I want to use the data to plot volume fraction against time, I am now doing this in CFX-post but it takes forever to calculate (1 hour ++++). If it was possible to get the solver to just write the values to a csv file or something that would be great. Also, is it possible to set stop criteria for the simulations? So that the solver runs until the volume fraction of a phase is less than a given value? Thanks for the help

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March 5, 2016, 06:05		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,011 Rep Power: 146	This is very easy - just use a monitor point defined with a CEL expression. volumeInt(Phase1.vf)@domain or something like that. Stop criteria - have a look at termination criteria in the CFX documentation.