[ErenC]

Greetings!

I am trying to calculate nusselt number in buoyancy driven flow, I got no luck so far for runtime nusselt calculation( there are great resources in forums and chalmers but all of them are for different versions, or someone was using swak4foam which, I literally have no idea. So if anyone has knowledge on nussel calculation on OF6, I'll be glad.)


So, I gave up on run time calculation and use "#include wallHeatTransferCoef" in controlDict so I can calculate Nusselt number it on excel but wallHeatTransferCoeff gives values for all walls(it is a enclosure), so:

1) It gaves same value for all walls(and for all time steps), I doubt thats true, T is not really same and even min and max are the same! So I need to modify something but what? I couldn't find anything on user manual.

2) It is really annoying to process that data, is there any way to get that data for only one wall?

Thank you in advance,
Eren.

[ErenC]

I should probably add these. Last timestep calculations:

wallHeatTransferCoeff wallHeatTransferCoeff write:
    writing object wallHeatTransferCoeff
    min/max/integ(TWall) = 0.000637602, 0.000637602, 6.37602e-09
    min/max/integ(BWall) = 0.000637602, 0.000637602, 6.37602e-09
    min/max/integ(LWall) = 0.000637602, 0.000637602, 6.37602e-09
    min/max/integ(RWall) = 0.000637602, 0.000637602, 6.37602e-09

and system/wallHeatTransferCoeff:

type wallHeatTransferCoeff;
libs ("libfieldFunctionObjects.so");

rho 1.156;
Cp 3591;
Prl 6.12;
Prt 6.12;

executeControl writeTime;
writeControl writeTime;

[akidess]

You can use the 'patches' keyword to restrict the postprocessing to certain patches:

https://github.com/OpenFOAM/OpenFOAM...ransferCoeff.H

[ErenC]

Originally Posted by akidess

You can use the 'patches' keyword to restrict the postprocessing to certain patches:

https://github.com/OpenFOAM/OpenFOAM...ransferCoeff.H

Thank you! This will help me save a lot of time. So, any comment on why it gaves same value for all patches?
Left and Right walls are zeroGradient and high temperature BC applied from bottom, it is impossible to have same htcoeff at all patches.