[Jahir]

Hello.


After some months of foaming I'm tying a very simple case of Poiseuille flow in steady state. I've build and run everything correctly but I can't get to run the case whenever I try to compute the force in the walls.


My controlDict is as follows:

/*--------------------------------*- C++ -*----------------------------------*\ 
| =========                 |                                                 | 
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           | 
|  \\    /   O peration     | Version:  v2312                                 | 
|   \\  /    A nd           | Website:  www.openfoam.com                      | 
|    \\/     M anipulation  |                                                 | 
\*---------------------------------------------------------------------------*/ 
FoamFile 
{ 
    version     2.0; 
    format      ascii; 
    class       dictionary; 
    object      controlDict; 
} 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 

application     simpleFoam; 

startFrom       startTime; 

startTime       0; 

stopAt          endTime; 

endTime         500; 

deltaT          1; 

writeControl    timeStep; 

writeInterval   100; 

purgeWrite      0; 

writeFormat     ascii; 

writePrecision  6; 

writeCompression off; 

timeFormat      general; 

timePrecision   6; 

runTimeModifiable true; 

functions 
{ 
        fuerzasParedes 
        { 
                type            forces; 
                libs            ("libforces.so"); 
                patches         (walls); 
                rho             rhoInf; 
                rhoInf          1; 
        } 
} 

// ************************************************************************* //

When I run simpleFoam, I get the following error:

/*---------------------------------------------------------------------------*\ 
| =========                 |                                                 | 
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           | 
|  \\    /   O peration     | Version:  2406                                  | 
|   \\  /    A nd           | Website:  www.openfoam.com                      | 
|    \\/     M anipulation  |                                                 | 
\*---------------------------------------------------------------------------*/ 
Build  : _be01ca78-20240625 OPENFOAM=2406 version=2406 
Arch   : "LSB;label=32;scalar=64" 
Exec   : simpleFoam 
Date   : Jul 30 2024 
Time   : 22:25:47 
Host   : jahir-g3-3579 
PID    : 135745 
I/O    : uncollated 
Case   : /home/jahir/OpenFOAM/jahir-v2406/run/flujoPoiseuille2D 
nProcs : 1 
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE). 
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20) 
allowSystemOperations : Allowing user-supplied system call operations 

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

Create mesh for time = 0 


SIMPLE: no convergence criteria found. Calculations will run for 200 steps. 

Reading field p 

Reading field U 

Reading/calculating face flux field phi 

Selecting incompressible transport model Newtonian 
Selecting turbulence model type laminar 
Selecting laminar stress model Stokes 
No MRF models present 

No finite volume options present 

Starting time loop 

forces fuerzasParedes: 
    rho: rhoInf 
    Freestream density (rhoInf) set to 1 
    Not including porosity effects 


--> FOAM FATAL IO ERROR: (openfoam-2406) 


file: system/controlDict/functions/fuerzasParedes at line 51 to 55. 

    From bool Foam::dictionary::readEntry(const Foam::word&, T&, Foam::keyType::option, Foam::IOobjectOption::readOption) const [with T =
 Foam::Vector<double>] 
    in file lnInclude/dictionaryTemplates.C at line 327. 

FOAM exiting

I've read about the forces function and I can't see the error. I guess it's something trivial, but I can't see it.


Btw, it's running on Ubuntu 24.04 inside distrobox (Endeavour OS).