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-   -   Heat transfer coefficient (http://www.cfd-online.com/Forums/openfoam-solving/99114-heat-transfer-coefficient.html)

CIN3X March 26, 2012 10:58

Heat transfer coefficient
 
Hello to all experts and non-experts here in the forum.
I'am new to OpenFOAM (did some SimpleFoam simulations of a rotorblade), but it's the first time i am dealing with heat transfer.
My questionis:
Is there a way to calculate the heat transfer coefficient in OpenFAOM?
I searched not only this forum. The only thread i found matching this question is from the year 2005 and OpenFOAM 1.5 and there was no solution found that time.
Now we have 2012 and OpenFOAM 2.1 and i think there was alot of development in OpenFOAM, so i thought perhaps there is a simple or not so simple way of calculating the heat transfer coefficent.

My case is really simple it's a stream in a pipe. lets say the pipewall is 500K and the inletstream is 200K.
And i want the local heat transfer coefficient.

Is there any application or function to calculate the heat transfer coefficient?

With kind Regards
Viktor

raghu.tejaswi March 30, 2012 05:43

Htc
 
Hallo,

I also have exactly the same situation. From forums, I understand that buoyantBoussinnesqSimpleFoam solver can be used for heat transfer.
But for HTC, I think you need to first calculate the wallHeatFlux from the utility below (not sure if it will work for the latest versions).

http://openfoamwiki.net/index.php/Contrib_wallHeatFlux

The utility is obviously present in OF2.0.1 but I get an error when I try to use it. I am not sure what I can do about it.




Time = 0
Selecting thermodynamics package hsPsiThermo<pureMixture<constTransport<specieTherm o<hConstThermo<perfectGas>>>>>


--> FOAM FATAL ERROR:
Attempt to return primitive entry ITstream : /localhome/bellurramesh/Thesis/ANalytical/test/constant/thermophysicalProperties::mixture, line 19, IOstream: Version 2.0, format ASCII, line 0, OPENED, GOOD
primitiveEntry 'mixture' comprises
on line 19 the word 'air'
on line 19 the label 1
on line 19 the doubleScalar 28.9
on line 19 the label 1007
on line 19 the label 0
on line 19 the doubleScalar 1.84e-05
on line 19 the doubleScalar 0.7
as a sub-dictionary

From function const dictionary& primitiveEntry::dict() const
in file db/dictionary/primitiveEntry/primitiveEntry.C at line 159.

FOAM aborting

#0 Foam::error::printStack(Foam::Ostream&) in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#1 Foam::error::abort() in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#2 Foam::primitiveEntry::dict() const in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libOpenFOAM.so"
#3 Foam::pureMixture<Foam::constTransport<Foam::speci eThermo<Foam::hConstThermo<Foam::perfectGas> > > >::pureMixture(Foam::dictionary const&, Foam::fvMesh const&) in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libbasicThermophysicalModels.so"
#4 Foam::hsPsiThermo<Foam::pureMixture<Foam::constTra nsport<Foam::specieThermo<Foam::hConstThermo<Foam: :perfectGas> > > > >::hsPsiThermo(Foam::fvMesh const&) in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libbasicThermophysicalModels.so"
#5 Foam::basicPsiThermo::addfvMeshConstructorToTable< Foam::hsPsiThermo<Foam::pureMixture<Foam::constTra nsport<Foam::specieThermo<Foam::hConstThermo<Foam: :perfectGas> > > > > >::New(Foam::fvMesh const&) in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libbasicThermophysicalModels.so"
#6 Foam::basicPsiThermo::New(Foam::fvMesh const&) in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/lib/libbasicThermophysicalModels.so"
#7 Foam::regIOobject::writeObject(Foam::IOstream::str eamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/bin/wallHeatFlux"
#8 __libc_start_main in "/lib64/libc.so.6"
#9 Foam::regIOobject::writeObject(Foam::IOstream::str eamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/opt/openfoam/OpenFOAM-2.0.1/platforms/linux64GccDPOpt/bin/wallHeatFlux"
Abbruch





Well if I succeed, I will post back and expect the same from you. :)

CIN3X April 3, 2012 03:07

Thanks for your answer!
I will report when i succeed or when i make some progress in calculating the htc!

kind regards Viktor

dmck November 25, 2013 05:54

error with temp
 
hi raghu tejaswi

I was wondering if you found out why you got the error you posted above, if so what does it mean?

I have seen a similar error myself and struggling to find an answer.

I'm aware this is an old thread, I was hoping you would remember.

regards

dmck


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