[AS_Aero]

Hi All

I want to run my case on cluster and am using a batch script for that. But I have a doubt how to insert the .res file to initialize my case.

So I have a Rans .res file and I am using that to intialize my LES. So how can i insert on the below mentioned arguments

I also have to save the .ccl file so for LES I will have to save the LES.def and LES.ccl, but while creating the .def file for les should I insert the RANS.res already or can I do it with this script ?

--------------------------------------------
# CFX arguments
CFXARGS="-def RANS_6.def -ccl RANS_6.ccl -double -size-mms 2.0"

# limit runtime (argument to CFX option -maxet)
#MAXET="1440 [min]"

SIMNAME=$PBS_JOBID

# number of cores to use per node (must be an even number!)
PPN=20

# ANSYS version to use
module add ansys/17.1

[monkey1]

Do not know about the correct use in your script, but I think you should look for an option like:
-continue-from-file

Meaning you would say that the les.def has to be solved with -continue-from-file rans.res as initial values....

Maybe this might lead to you to the solution

[AS_Aero]

Hi

Well the one you are saying is most common one but I have a script given from the university and it has this option like what I have written. So I dont know how to change here and I wanted a solution for that

[monkey1]

I would just have tried smth like:
# CFX arguments
CFXARGS="-def LES.def -continue-from-file RANS.res -ccl LES.ccl -double -size-mms 2.0"

...

[AS_Aero]

ok I will try and let you know ..

[-Maxim-]

CFX help says:

-initial <file>

-ini <file>

Uses the initial values in the CFX-Solver results file <file>. The mesh from this results file is used unless the -interpolate-iv option is also specified. This option has been deprecated and should be replaced by -initial-file or -continue-from-file as appropriate.

-initial-configuration <configuration name>

-ini-conf <configuration name>

Uses initial values from the most recent results for the named configuration as a basic initial guess for the run. The run history from this file is discarded. The mesh from this results file is used unless the -interpolate-iv option is also specified. See Continuing the History in the CFX-Solver Modeling Guide for more details.

-initial-file <file>

-ini-file <file>

Uses initial values from the specified CFX-Solver Results file as a basic initial guess for the run. The run history from this file is discarded. The mesh from the configuration (.cfg) file or the CFX-Solver input file is used unless the -use-mesh-from-iv option is also specified. See Continuing the History in the CFX-Solver Modeling Guide for more details.

-continue-from-file <file>

-cont-from-file <file>

Uses initial values and continues the run from the specified CFX-Solver results file. The mesh from the CFX-Solver input file is used unless the -use-mesh-from-iv option is also specified. Only one -continue-from-file argument can be supplied. See Continuing the History in the CFX-Solver Modeling Guide for more details.

-continue-from-configuration <configuration name>

-cont-from-config <configuration name>

Uses initial values and continues the run from the most recent results for the named configuration. The mesh from the configuration (.cfg) file is used unless the -use-mesh-from-iv option is also specified. Only one -continue-from-configuration argument can be supplied. See Continuing the History in the CFX-Solver Modeling Guide for more details.

you will also find all the other commands such as setting the memory in the help file.

[AS_Aero]

So the ini works when I start from a RANS.res file but what if I need to continue to run my LES case with .trn file ? or restart my case from the last .trn file ?
Can I use the same ini instead of .res file can i give .trn file ?

[-Maxim-]

AFAIK you need to include the mesh in the *.trn files to be able to restart from those.
You should use the search function of this forum. A lot of your questions have already been answered multiple times...

[AS_Aero]

Ofcourse when I restart my case due to limited wall time I am going to use the same mesh why would I change the mesh. Its just restarting the Simulation with the last .trn file. Sorry if you dint understand my question.

[-Maxim-]

Originally Posted by AS_Aero

Sorry if you dint understand my question.

So what exactly is your question?
Do you currently include the mesh in your *.trn-files? You have to define that in PRE.

[AS_Aero]

So my question was how to start an LES from a RAN.res file which ran for 3000 Iterations lets say.
And I got the answer that in my script I can do

# CFX arguments
CFXARGS="-def RANS_6.def -ini RANS.res -ccl RANS_6.ccl -double -size-mms 2.0"

This works well now but since its LES and my walltime is limited I need to restart my case every 24 hours. So for that I am using the same script with the same command line but with a change instead of .res I use .trn
# CFX arguments
CFXARGS="-def RANS_6.def -ini LES100000.trn -ccl RANS_6.ccl -double -size-mms 2.0"

So here I dont insert my mesh but already the .def file has the mesh details. I hope I made you clear and let me know if I am doing some mistake !!

[-Maxim-]

okay. And I answered to that: IF you include your mesh in the *.trn-files, you should be able to continue from your *.trn-file.
Use "-cont-from-file XXX.trn" instead of "-ini-file XYZ.res" so that your simulation history will continue (monitor points etc)

[AS_Aero]

So how can we include the mesh in the *.trn file ? What do you mean by that ? And now my case is running perfectly after giving -ini *.trn as well. So does it mean that it can be wrong ?
Also I have a doubt ! In my .out file the RMS residual values are updated till the current timesteps, but my Turbulence K-E is not it just shows till the RANS iterations and from there no TKE values are updated. Is it becoz am using LES WALE model ?

[-Maxim-]

Originally Posted by AS_Aero

So how can we include the mesh in the *.trn file ? What do you mean by that ? And now my case is running perfectly after giving -ini *.trn as well. So does it mean that it can be wrong ?

Originally Posted by -Maxim-

Do you currently include the mesh in your *.trn-files? You have to define that in PRE.

Look it up in the help files. That's what they are there for.
If your case runs "perfectly", everything is good. If you searched this forum, you would find posts, where people were only continue from a *.trn file when they included the mesh. I searched the forum and that's why I was suggesting that you include the mesh.