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finding Nusselt number
Title
Question
Dear Sir,
i found Nusselt number code in cfd online .
http://www.cfd-online.com/Forums/openfoam-post-processing/82263-nusselt-number-over-theta.html
what changes should be done in ControlDict file for post processing results? I am using buoyantBoussinesqSimpleFoam

OpenFOAM Flow-over-a-flat-plate 08-09 min 10-20 sec 29-04-16, 1:37 p.m. vnarayana.wgl

Answers:

Hi,
I think it's easier to use ParaView to calculate Nusselt Number over a boundary. But if it does not work out you can use a utility NusseltCalc in OpenFOAM to calculate <span style="line-height: 21.4286px;">Nusselt Number for buoyancy driven flows. You may follow the pdf report given in the link below to make changes in your case file, (checkout section 4):</span>
<a href="http://https://www.google.co.in/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=2&amp;cad=rja&amp;uact=8&amp;ved=0ahUKEwjwg5Gwj7rMAhUDcI4KHRdcA1kQFggpMAE&amp;url=http%3A%2F%2Fwww.tfd.chalmers.se%2F~hani%2Fkurser%2FOS_CFD_2010%2FjohanMagnusson%2FjohanMagnussonReport.pdf&amp;usg=AFQjCNH_4Qs3UM_f3OI8tF7RiBB80MDjwg&amp;sig2=2GNgzrE2MS2QXUP2I23V7w&amp;bvm=bv.121070826,d.c2E" target="" title="Creat NusseltCalc">Creat NusseltCalc</a>

Do let me know if you have any further problem.
02-05-16, 6:18 a.m. Subhasree
I did some changes in wallHeatFlux to find Nusselt number, for that no issues .
my solver is buoyantBoussinesqSimpleFoam. to see the post processing results (Nusselt Number), i think some changes to make in ControlDict/Transport file? if you have idea please tell me sir?
my ControlDict file

application buoyantBoussinesqSimpleFoam;

startFrom latestTime;

startTime 0;

stopAt endTime;

endTime 10000;

deltaT 1;

writeControl runTime;

writeInterval 50;

purgeWrite 0;

writeFormat ascii;

writePrecision 6;

writeCompression off;

timeFormat general;

timePrecision 6;

runTimeModifiable true;
functions
(
probes
{
type probes;
name probes;
functionObjectLibs ("libsampling.so");
/*probeLocations
(
(0.025627 0 -0.00023237)
(0.0518278 0 -0.000461021)
);
fields
(
NusseltNumber
);*/
mode magnitude;
outputControl outputTime;
outputInterval 1;
}
);

i don't know whether it is right or wrong ?
but i am not getting the output ? would you please help me
02-05-16, 8:01 a.m. vnarayana.wgl

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