[nusivares]

Hello,

I am having a problem with of the simulation files - I have run it already, but want to extract the heat transfer coefficient. I have learnt how within the simulation (control dict), however, when I try to run a following using a text file with:

type heatTransferCoeff;
libs ("libfieldFunctionObjects.so");
field T;
patches ("walls.*");

htcModel ReynoldsAnalogy;
UInf (0 0 0.0494);
Cp CpInf;
CpInf 4178;
rho rhoInf;
rhoInf 994.1;
writeControl writeTime;


I get an error:

/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v1712                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : v1712
Arch   : "LSB;label=32;scalar=64"
Exec   : postProcess -func heatCoeff
Date   : Oct 03 2018
Time   : 16:09:41
Host   : "cslin229.csunix.comp.leeds.ac.uk"
PID    : 17448
I/O    : uncollated
Case   : /usr/not-backed-up/ARC/ALM/corrugation/corrug_ALM-c
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 10)
allowSystemOperations : Allowing user-supplied system call operations

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 1000

Selecting heat transfer coefficient model ReynoldsAnalogy
Time = 1000

Reading fields:
    volScalarFields: T


Executing functionObjects


--> FOAM FATAL ERROR: 

    request for volVectorField U from objectRegistry region0 failed
    available objects of type volVectorField are
0()

    From function const Type& Foam::objectRegistry::lookupObject(const Foam::word&, bool) const [with Type = Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh>]
    in file /home/csunix/linux/apps/install/openfoam/v1712+/OpenFOAM-v1712/src/OpenFOAM/lnInclude/objectRegistryTemplates.C at line 239.

FOAM aborting

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::error::abort() at ??:?
#2  Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> const& Foam::objectRegistry::lookupObject<Foam::GeometricField<Foam::Vector<double>, Foam::fvPatchField, Foam::volMesh> >(Foam::word const&, bool) const at ??:?
#3  Foam::heatTransferCoeffModels::ReynoldsAnalogy::Cf() const at ??:?
#4  Foam::heatTransferCoeffModels::ReynoldsAnalogy::htc(Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>&) at ??:?
#5  Foam::heatTransferCoeffModel::calc(Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>&) at ??:?
#6  Foam::functionObjects::heatTransferCoeff::calc() at ??:?
#7  Foam::functionObjects::fieldExpression::execute() at ??:?
#8  Foam::functionObjects::timeControl::execute() at ??:?
#9  Foam::functionObjectList::execute() at ??:?
#10  ? at ??:?
#11  ? at ??:?
#12  __libc_start_main in "/lib64/libc.so.6"
#13  ? at ??:?
Aborted (core dumped)

How do I solve it? seems like it should be an easy fix, but I am struggling.

[nusivares]

Ok, found a work around... might as well post it for people:

do "your solver" -postProcess

As long as you have the function in control dict - it will to it.

One of the many hidden features of openfoam, i guess - I have been using it for 3 years now..

[akidess]

Not hidden, it's documented:

Every solver can be run with the -postProcess option, which only executes post-processing, but with additional access to data available on the database for the particular solver.
https://cfd.direct/openfoam/user-gui...rocessing-cli/

[nusivares]

Originally Posted by akidess

Not hidden, it's documented:

And where else do you think I got the error from aboeve?? Did you try running the function yourself? at least in both 4.1 and v1712 versions - this gives no results.

And yes - I do not have access to newer versions for some peculiar reasons.

[akidess]

Reread my quote very carefully. You ran "postProcess" and got an error, the user guide tells you to run the solver with the "-postProcess" flag, i.e. "simpleFoam -postProcess".