CFD Online Discussion Forums - Run each simulation based on initial condition of previous run results

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)

- CFX (https://www.cfd-online.com/Forums/cfx/)

- - Run each simulation based on initial condition of previous run results (https://www.cfd-online.com/Forums/cfx/159106-run-each-simulation-based-initial-condition-previous-run-results.html)

Run each simulation based on initial condition of previous run results

Hello.
I face a new problem !
I have a simulation that contain a fixed geometry and mesh and several pressure boundary condition.
I reed other post in this forum to automatically change pressure and run several time.
I did this:
I made a cfx analyze system and defined parameter for pressure boundary condition. then i duplicate it and change the parameters and continue to duplicating and changing parameters until all pressure finished.
Updating setup cells and updating solution cell.
Runs send to RSM and execute 1 by 1 automatically.
The problem in that i want each run based on initial condition of previous run result. But because cfx , cfx 1 , cfx 2 , cfx 3 , cfx 4 , ..... have different working directory this not happen.
How can i do this ???
And is my way for doing some repetitive job for several pressure correct ?

This is easy to do using the command line to start the jobs. Just define the initial condition as the result file from the previous run.

I am no expert on running this stuff under RSM so I cannot say for how it is done that way.

Yes, I know i can set initial condition on "Update from current solution data if possible" .
But problem is that this option use current solution data in that case.
but in my problem there is cfx , cfx1 , cfx2 , ...
how to use last result of cfx , in initial condition of cfx 1 ??
And about command line , i know nothing !!! How can i do this using command ? and where is it ?? in WorkBench ? in cfx setup ??

I always prefer the command line options when doing anything like what you propose. That way you can directly specify what is input to what.

Have a look in the documentation under "Starting CFX from the Command Line".

Ok,
I did it using command line:

Code:

# encoding: utf-8

# Release 16.1

SetScriptVersion(Version="16.1.91")

i = 1

while (i < 3):

        

        j=1

        while (j < 10):

                designPoint1 = Parameters.GetDesignPoint(Name="0")

                p1 = Parameters.GetParameter(Name="P1")

                p2 = Parameters.GetParameter(Name="P7")

                p3 = Parameters.GetParameter(Name="P8")

                p1v = designPoint1.GetParameterValue(Parameter=p1)

                p2v = designPoint1.GetParameterValue(Parameter=p2)

                p3v = designPoint1.GetParameterValue(Parameter=p3)

                dp1 = Quantity ("10 [degree]")

                dp2 = Quantity ("10000 [Pa]")

                dp3 = Quantity ("100000 [Pa]")

                p2v = p2v + dp2

                p93v=p2v

                p2v = str ( p2v )

                designPoint1.SetParameterExpression(

                        Parameter=p2,

                        Expression=p2v)



                system1 = GetSystem(Name="CFX")

                setup = system1.GetComponent(Name="Setup")

                setup.Update(AllDependencies=True)

                solution = system1.GetComponent(Name="Solution")

                solution.Update(AllDependencies=True)

                results = system1.GetComponent(Name="Results")

                results.Update(AllDependencies=True)

                solution = system1.GetContainer(ComponentName="Solution")

                solution.ClearOldSolutionData(KeepReferenced=False)

                

                p4 = Parameters.GetParameter(Name="P4")

                p5 = Parameters.GetParameter(Name="P5")

                p6 = Parameters.GetParameter(Name="P9")

                p7 = Parameters.GetParameter(Name="P10")

                p8 = Parameters.GetParameter(Name="P11")

                p9 = Parameters.GetParameter(Name="P12")

                p10 = Parameters.GetParameter(Name="P13")

                p11 = Parameters.GetParameter(Name="P94")

                p4v = designPoint1.GetParameterValue(Parameter=p4)

                p5v = designPoint1.GetParameterValue(Parameter=p5)

                p6v = designPoint1.GetParameterValue(Parameter=p6)

                p7v = designPoint1.GetParameterValue(Parameter=p7)

                p8v = designPoint1.GetParameterValue(Parameter=p8)

                p9v = designPoint1.GetParameterValue(Parameter=p9)

                p10v = designPoint1.GetParameterValue(Parameter=p10)

                p11v = designPoint1.GetParameterValue(Parameter=p11)

                f= open ("result.txt","a")

                f.write("%s %s %s %s %s %s %s %s %s %s %s  \n \n" %(round(p1v.Value),p93v.Value,p3v.Value,p4v.Value,p5v.Value,p6v.Value,p7v.Value,p8v.Value,p9v.Value,p10v.Value,p11v.Value))

                f.close()

                Save(

                        FilePath="E:/2 Phase - all degree - 6 inch/%s [degree]---(%s).wbpj" %(round(p1v.Value),p2v),

                        Overwrite=True)

                        

                

                

                j=j+1

                

        p1v = p1v + dp1

        p1v=p1v.ConvertUnit("degree")

        p1v= str (p1v)

        designPoint1.SetParameterExpression(

                Parameter=p1,

                Expression=p1v)

        designPoint1.SetParameterExpression(

                Parameter=p2,

                Expression="100000")

                

        i=i+1

        

exit

It was better than using rsm. :)