[RobertHB]

Originally Posted by npatricia

--> FOAM FATAL ERROR:
Attempt to return primitive entry ITstream : /home/tflows/OpenFOAM/OpenFOAM-2.4.0/tutorials/heatTransfer/buoyantBoussinesqSimpleFoam/solarPond_1/constant/fvOptions.radiation.sourceTimeCoeffs, line 89, IOstream: Version 2.0, format ASCII, line 0, OPENED, GOOD
primitiveEntry 'sourceTimeCoeffs' comprises
on line 89 the verbatim string "\
"
as a sub-dictionary

That's what you are looking for. I tried to identify the error in your fvOptions post above, but couldnt find the line. Maybe you have more look when looking at your dict file.
My guess would be, that having the \ character there is of no use and/or missplaced.

[npatricia]

type scalarCodedSource;
active yes;
name radiativeHeatExchange;
selectionMode all;

scalarCodedSourceCoeffs
{
fieldNames (T);
redirectType sourceTime;

codeInclude
#{
// Need this for Stefan-Boltzmann constant
#include "constants.H"
#};

codeCorrect
#{
#};

codeAddSup
#{
using constant:hysicoChemical::sigma;

if (not isActive())
return;

// Looking up model parameters
scalar Qsm = coeffs().lookupOrDefault<scalar>("Qsm", 164.0);
scalar rhow = coeffs().lookupOrDefault<scalar>("rho", 1000);
scalar Cp = coeffs().lookupOrDefault<scalar>("Cp", 4200);
scalar Rt = coeffs().lookupOrDefault<scalar>("Rt", 0.03);
scalar ew = coeffs().lookupOrDefault<scalar>("ew", 0.97);

// Getting source vector from equation matrix
scalarField& src = eqn.source();
const volScalarField& T = eqn.psi();

// Iterating through patch
word top_patch_name = coeffs().lookupOrDefault<word>("patch", "top");
const fvPatch& pp = mesh().boundary()[top_patch_name];
forAll(pp, i) {
label cell_i = pp.faceCells()[i];
scalar Ai = pp.magSf()[i];
scalar Ts = T[cell_i];

// Heating
src[cell_i] -= Qsm*(1-Rt)*Ai/rhow/Cp;

// Cooling
src[cell_i] -= -sigma.value()*ew*pow4(Ts)*Ai/rhow/Cp;
}
#};

codeSetValue
#{
#};

code
#{
$codeInclude;
$codeCorrect;
$codeAddSup;
$codeSetValue;
#};
}

sourceTimeCoeffs
#{
#};

radiativeHeatExchangeCoeffs
{
selectionMode all;

patch top; // Name of the top patch
Qsm 163.0; // Solar radiative heat flux
Rt 0.03; // Reflectivity of water
ew 0.97; // Emissivity of water
rho 1000.0;
Cp 4200.0;
}
}

I modified my fvOptions file as the above following earlier errors I was getting

[RobertHB]

Originally Posted by npatricia

sourceTimeCoeffs
#{
#};

Looks fine to me. Whatever the problem, you could try deleting the #{ #}; part and rewriting it by hand. Might fix the problem.

/edit: To add a bit of background to my idea: Your error complains about the string "\ " in the sourceTimeCoeffs. As you can see from your dict, there is no such string. But, to my knowledge, "\ " is used by a few programs to define the beginning of a new line. maybe your OpenFOAM got confused be the editor you use or you copied the content of the dict file from this forum? If yes, simple retyping the above mentioned part might be helpful.

[npatricia]

Thanks alot RobertHB, was able to rectify the error with adding a string to my sourceTimeCoeffs. Thanks once again

[fcl]

Hello RobertHB，
I can add a heat source in your way, but I need to add
the source in specific time, and limit the duration of the source. Could you please tell me
what should I do to add a 'startTime'.
Thank you in advance.

[RobertHB]

Hello fcl,
fvOption supports the keywords timeStart and duration. For further instructions see (e.g.) here.

[fcl]

Thanks a lot RobertHB.
I finally found out that, there need a conversion between mesh time and engine time in fvOption，because my simulation is for internal combustion engine

[npatricia]

Hello fcl,

Kindly give me a hand on this. An getting an error in running my case which am failing to understand
Time = 0.1

DILUPBiCGStab: Solving for Ux, Initial residual = 1.50379e-12, Final residual = 1.50379e-12, No Iterations 0
DILUPBiCGStab: Solving for Uy, Initial residual = 2.30853e-12, Final residual = 2.30853e-12, No Iterations 0
DILUPBiCGStab: Solving for Uz, Initial residual = 1.86985e-12, Final residual = 1.86985e-12, No Iterations 0
Using dynamicCode for fvOption:: radiativeHeatExchange at line 29 in "/home/patricia/OpenFoam/OpenFOAM-5.0/tutorials/heatTransfer/buoyantBoussinesqSimpleFoam/solarpond/constant/fvOptions.radiation.scalarCodedSourceCoeffs"
Selecting finite volume options model type radiativeHeatExchange
Source: radiativeHeatExchange
- selecting all cells
- selected 4000 cell(s) with volume 4
DILUPBiCGStab: Solving for T, Initial residual = 1, Final residual = 0.0414164, No Iterations 1
DICPCG: Solving for p_rgh, Initial residual = 1, Final residual = 0.00369374, No Iterations 7
time step continuity errors : sum local = 1.64439e+14, global = -0.00620117, cumulative = -0.00620117
ExecutionTime = 0.05 s ClockTime = 0 s

Time = 0.2

DILUPBiCGStab: Solving for Ux, Initial residual = 0.142672, Final residual = 0.00310035, No Iterations 1
DILUPBiCGStab: Solving for Uy, Initial residual = 0.050394, Final residual = 0.000837148, No Iterations 1
DILUPBiCGStab: Solving for Uz, Initial residual = 0.142672, Final residual = 0.00310035, No Iterations 1
DILUPBiCGStab: Solving for T, Initial residual = 0.205486, Final residual = 0.0128, No Iterations 1
DICPCG: Solving for p_rgh, Initial residual = 0.989794, Final residual = 122.425, No Iterations 1001
time step continuity errors : sum local = 6.73093e+17, global = 21, cumulative = 20.9938
ExecutionTime = 0.13 s ClockTime = 0 s

Time = 0.3

DILUPBiCGStab: Solving for Ux, Initial residual = 0.290563, Final residual = 0.0017344, No Iterations 10
DILUPBiCGStab: Solving for Uy, Initial residual = 0.29545, Final residual = 0.00188439, No Iterations 9
DILUPBiCGStab: Solving for Uz, Initial residual = 0.331798, Final residual = 0.00214973, No Iterations 10
DILUPBiCGStab: Solving for T, Initial residual = 0.0995518, Final residual = 0.00073122, No Iterations 1
#0 Foam::error:rintStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3 Foam:ICPreconditioner::calcReciprocalD(Foam::Fie ld<double>&, Foam::lduMatrix const&) at ??:?
#4 Foam:ICPreconditioner:ICPreconditioner(Foam::l duMatrix::solver const&, Foam::dictionary const&) at ??:?
#5 Foam::lduMatrix:reconditioner::addsymMatrixConst ructorToTable<Foam:ICPreconditioner>::New(Foam:: lduMatrix::solver const&, Foam::dictionary const&) at ??:?
#6 Foam::lduMatrix:reconditioner::New(Foam::lduMatr ix::solver const&, Foam::dictionary const&) at ??:?
#7 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#8 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&) at ??:?
#9 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
#10 Foam::fvMatrix<double>::solve() at ??:?
#11 ? at ??:?
#12 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#13 ? at ??:?
Floating point exception (core dumped)

What could be the problem here?
Thank you

PATRICIA

[fcl]

Hello npatricia,
sorry, I'm a new foamer.
According to me, you case seems failed to converge. Maybe you need to check your condition and the value of time step.