[vahid.najafi]

Hi dear Foamers.I have a problem,please help me to solve this.

Im working with interPhaseChaneFoam solver!!!in the end of run I want to have residual plot!!!
I have log file but in this I havent residual for Ux,Uy and Uz!!!!

I want to have residual U,but I seen:
"plotres.txt", line 7: warning: Skipping data file with no valid points
plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" title 'Ux' with lines,"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines,"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines
^
"plotres.txt", line 7: x range is invalid???
please help me to plot this residual!!!


{for more Description.
Im using gnuplot.for this work im do this work step by step:
1-my solver >log
2-tail -f log
3-Crtl+C
4-gnuplot plotres.txt
(file plotres.txt include:
set logscale y
set title "Residuals"
set ylabel 'Residual'
set xlabel 'Iteration'
plot "< cat log | grep 'Solving for U' | cut -d' ' -f9 | tr -d ','" title 'U' with lines,\
"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines,\
"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines,\
pause 1
reread
)
}


/////////////////////////////////////////////////////////////////////////
The point that needs to be said:
I plot residual P with this Commands in gnuplot!!!
/////////////////////////////////////////////////////////////////////////

please help me for this problem??
Thanks for your Attention.

[SirWombat]

could you post a small part of the logfile where the velocity residual is listet. we can then think about the correct syntax for your plot.

[Bernhard]

You may want to use the foamLog utility.

[vahid.najafi]

Hi dear SirWombat.
Thanks for your answer,I attachment Part of the log file in my log file.txt and plotres.txt,I hope that you with them,solve my problem???
Thank you very much.

[vahid.najafi]

Hi Dear Bernhard,Thanks for your answer.
please give me more information about to use the foamLog utility???
I've never use it!!!

[SirWombat]

Have a look at the official documentation: http://www.openfoam.org/docs/user/monitoring-jobs.php

foamLog "my log file.txt"

will create a folder "logs" containing a few plots. You can use gnuplot to plot those files, i.e.

gnuplot --persist -e "plot 'logs/p_rgh_0' w lines;"

---

about the velocity residual: i cannot find it in your log file, so unfortunately i cannot help you with that. There is this "max(U)" and you can surely extract this by using:

grep "max(U)"  "my log file.txt"  | awk '{print $2}'

but i am not sure what that actually is ... looks more like the actual maximum velocity than a residual ...

[vahid.najafi]

Hi agian dear SirWombat.

Thanks for your reply.
Im trying your commands ,but i dont succes to plot residual U yet!!!???
I ask you,if do you find a solution,advice to me.

However,thanks for your Guidance.

[Bernhard]

Originally Posted by vahid.najafi

Hi Dear Bernhard,Thanks for your answer.
please give me more information about to use the foamLog utility???
I've never use it!!!

You can use it ase "foamLog log" and you'll get a directory ./logs, where, I think, the are easily related to the original logfile.

[s.m]

Originally Posted by vahid.najafi

Hi dear Foamers.I have a problem,please help me to solve this.

Im working with interPhaseChaneFoam solver!!!in the end of run I want to have residual plot!!!
I have log file but in this I havent residual for Ux,Uy and Uz!!!!

I want to have residual U,but I seen:
"plotres.txt", line 7: warning: Skipping data file with no valid points
plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" title 'Ux' with lines,"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines,"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines
^
"plotres.txt", line 7: x range is invalid???
please help me to plot this residual!!!


{for more Description.
Im using gnuplot.for this work im do this work step by step:
1-my solver >log
2-tail -f log
3-Crtl+C
4-gnuplot plotres.txt
(file plotres.txt include:
set logscale y
set title "Residuals"
set ylabel 'Residual'
set xlabel 'Iteration'
plot "< cat log | grep 'Solving for U' | cut -d' ' -f9 | tr -d ','" title 'U' with lines,\
"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines,\
"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines,\
pause 1
reread
)
}


/////////////////////////////////////////////////////////////////////////
The point that needs to be said:
I plot residual P with this Commands in gnuplot!!!
/////////////////////////////////////////////////////////////////////////

please help me for this problem??
Thanks for your Attention.

you can use "pyFoamPlotRunner.py simpleFoam" if you use simpleFoam For your analysis.
it will show you the residuals during the run.

[amir_kb]

Hi Vahid
I think you must remove the ,\ at the end of line 7 (just one line before pause 1).

[amir_kb]

set logscale y
set title "Residuals"
set ylabel 'Residual'
set xlabel 'Iteration'
plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" title 'Ux' with lines,\
"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines,\
"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines,\
"< cat log | grep 'Solving for omega' | cut -d' ' -f9 | tr -d ','" title 'omega' with lines,\
"< cat log | grep 'Solving for k' | cut -d' ' -f9 | tr -d ','" title 'k' with lines,\
"< cat log | grep 'Solving for p' | cut -d' ' -f9 | tr -d ','" title 'p' with lines
pause 1
reread

[ashishvshelke]

Dear Foamer,
I am working on fuel cloud combustion, in which a fuel vapor cloud is getting form in case of leakage of fuel and get ignited by any heat source available.

I have tried this in fireFoam as fuel C3H8 is inlet from ground for certain time span to make a cloud.

with singleStepReactingMixture, infinitelyFastChemistry<psiThermoCombustion,constG asHThermoPhysics> started the chemical reaction as O2 comes contact in C3H8..

in many available "ignition" contained model do not contain the species fraction that I required as CO2, H2O


so I need a model that contain:
1 Radiation Model
2 LES
3 Species Transport
4 Spark ignition