How to plot Residuals in OpenFOAM | [OpenFOAM in Windows 10]

Tutorial on plotting residual for OpenFOAM simulation.
Pre-requisite for WSL users: • Enable Graphical Appli...
Gnuplot code: drive.google.c...
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#openfoam​ #paraview​ #cfd​ #residuals

[@claudiadelacruz7899]

Thank very much for your explanations!! This is the best video I founded about plot Residuals

[@ramkumars2329]

there is an alternate way for those who use other plotting methods (like python or excel).. "foamLog " command will create "logs" folder and place residuals along with other variables extracted from logfile.. which further can be taken to excel or read by python and plot

[@pranayp2239]

Thanksss for this

[@vigneshsp4619]

Nice video, but I usually use solverInfo functionObject and foam monitor command, mainly to check residuals during run time

[@DDFluids]

FunctionObject is also a good option for run time post-processing. But is it possible in v2012? Is there freedom of changing colors, thickness of lines and text of graph?

[@gilbertheduardocruzadomend310]

Thank U, its much interesting

[@gaurya4071]

Very nice video👍👍👍

[@DDFluids]

Thank you very much!

[@momosh59]

It was a great video. Thanks
Could you please explain how to plot a value, (for example Pressure Average at an Outlet of a pipe or etc) while the simulation is running?
Best wishes

[@alimarzooq5051]

the same method prints real time data

[@asifraj321]

"Residuals" line 10: undefined variable: pause.
I get this in the terminal while typing gunplot Residuals. how can I rectify it?
Also hope you make a video on the graph plot and save data for reference.

[@DDFluids]

Sure. In 15 days 😃

[@gaurya4071]

Hye, bro also make videos on grid independency.

[@DDFluids]

Sure, Thanks for suggestions!

[@saurabhkukreti767]

Sir I have downloaded gunplot from your video but unable to plot this graph although all steps I have done correct
Error showing is
"Residuals", line0:Cannot open script file 'residuals'

[@NITESHKSAHU]

USE this
set border lw 4
set logscale y
set title "Residuals" font "arial,22"
set ylabel "Residual" font "arial,18"
set xlabel "Iteration" font "arial,18"
set key width 1
# Loop to update the plot
do for [i=0:*] {
plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" title 'Ux' with lines lw 4,\
"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines lw 4,\
"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines lw 4,\
"< cat log | grep 'Solving for k' | cut -d' ' -f9 | tr -d ','" title 'k' with lines lw 4,\
"< cat log | grep 'Solving for p' | cut -d' ' -f9 | tr -d ','" title 'p' with lines lw 4
pause 1
}

[@jay22kar]

Hello, great video!
I was wondering could we plot "mean & maxCo" the same way? By adding a similar line with " < cat log grep... maxCo.." something like that? Thanks

[@DDFluids]

Yes. That is possible.

[@NITESHKSAHU]

set border lw 4
set logscale y
set title "Residuals" font "arial,22"
set ylabel "Residual" font "arial,18"
set xlabel "Iteration" font "arial,18"
set key width 1
# Loop to update the plot
do for [i=0:*] {
plot "< cat log | grep 'Solving for Ux' | cut -d' ' -f9 | tr -d ','" title 'Ux' with lines lw 4,\
"< cat log | grep 'Solving for Uy' | cut -d' ' -f9 | tr -d ','" title 'Uy' with lines lw 4,\
"< cat log | grep 'Solving for Uz' | cut -d' ' -f9 | tr -d ','" title 'Uz' with lines lw 4,\
"< cat log | grep 'Solving for k' | cut -d' ' -f9 | tr -d ','" title 'k' with lines lw 4,\
"< cat log | grep 'Solving for p' | cut -d' ' -f9 | tr -d ','" title 'p' with lines lw 4
pause 1
}
The above script works without error