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Old   February 17, 2017, 09:01
Default rhoSimpleFoam error
  #1
Member
 
Jan Surwiło
Join Date: Feb 2017
Posts: 31
Rep Power: 9
johny0688 is on a distinguished road
Hello,
I'm new in openFoam. I did the icoFoam and simpleFoam simulation. But now I want to try rhoSimpleFoam with k-e turbulent model and i face problem. Mu case is simple 2,5D cylinder in channel. Velocity inlet v=2m/s on left, pressure outlet p=0Pa on right. Up and down as wall and front/back as empty. I copy the tutorial files from /tutorials/compressible/rhoSimpleFoam/squareBend/. I changed the /0 to my boundary condition and try to run simulate. Byt at the beginning of the calculation I obtain error. I pass my BC below as well as error.
boundary
Code:
 /*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       polyBoundaryMesh;
    location    "constant/polyMesh";
    object      boundary;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

6
(
    cylinder
    {
        type            wall;
        inGroups        1(wall);
        nFaces          188;
        startFace       33632;
    }
    up_wall
    {
        type            wall;
        inGroups        1(wall);
        nFaces          64;
        startFace       33820;
    }
    down_wall
    {
        type            wall;
        inGroups        1(wall);
        nFaces          64;
        startFace       33884;
    }
    inlet
    {
        type            patch;
        nFaces          31;
        startFace       33948;
    }
    outlet
    {
        type            patch;
        nFaces          77;
        startFace       33979;
    }
    front_back_empty
    {
        type            empty;
    //    inGroups        1(wall);
        nFaces          33844;
        startFace       34056;
    }
)

// ************************************************************************* //
alphat
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    location    "0";
    object      alphat;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [1 -1 -1 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    cylinder
        {
            type    compressible::alphatWallFunction;
            Prt    0.85;
            value    uniform 0;
        }

    up_wall
        {
            type    compressible::alphatWallFunction;
            Prt    0.85;
            value    uniform 0;
        }

    down_wall
        {
            type    compressible::alphatWallFunction;
            Prt    0.85;
            value    uniform 0;
        }

    inlet
        {
            type    calculated;
            value    uniform 0;
        }
    
    outlet
        {
            type    calculated;
            value    uniform 0;
        }
    
    front_back_empty
        {    
            type    empty;
        }            


}

// ************************************************************************* //
k
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    location    "0";
    object      k;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform 0.0006;


boundaryField
{
    cylinder
        {
            type    kqRWallFunction;
            value    uniform 0;
        }

    up_wall
        {
            type    kqRWallFunction;
            value    uniform 0;
        }

    down_wall
        {
            type    kqRWallFunction;
            value    uniform 0;
        }

    inlet
        {
            type    fixedValue;
            value    uniform 0.0006;
        }
    
    outlet
        {
            type    fixedValue;
            value    uniform 0.0006;
        }
    
    front_back_empty
        {    
            type    empty;
        }            


}

// ************************************************************************* //
epsilon
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    location    "0";
    object      epsilon;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -3 0 0 0 0];

internalField   uniform 0.0001207;

boundaryField
{
    cylinder
    {
        type            epsilonWallFunction;
        Cmu             0.09;
        kappa           0.41;
        E               9.8;
        value           uniform 0.0001207;
    }

    up_wall
    {
        type            epsilonWallFunction;
            Cmu             0.09;
            kappa           0.41;
            E               9.8;
            value           uniform 0.0001207;    
    }

    down_wall
    {
        type            epsilonWallFunction;
            Cmu             0.09;
            kappa           0.41;
            E               9.8;
            value           uniform 0.0001207;    
    }


    inlet
    {
        type            turbulentMixingLengthDissipationRateInlet;
        mixingLength    0.02;
        value           uniform 0.0001207;
    }
    outlet
    {
        type            inletOutlet;
        inletValue      uniform 0.0001207;
        value           uniform 0.0001207;
    }

    front_back_empty
    {
        type    empty
    }
}


// ************************************************************************* //
nut
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    location    "0";
    object      nut;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -1 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    cylinder
    {
        type            nutkWallFunction;
        Cmu             0.09;
        kappa           0.41;
        E               9.8;
        value           uniform 0.0001207;
    }

    up_wall
    {
        type            nutWallFunction;
            Cmu             0.09;
            kappa           0.41;
            E               9.8;
            value           uniform 0.0001207;    
    }

    down_wall
    {
        type            nutWallFunction;
            Cmu             0.09;
            kappa           0.41;
            E               9.8;
            value           uniform 0.0001207;    
    }


    inlet
    {
    type    calculated;
    value    uniform 0;
    }
    outlet
    {
        type    calculated;
        value    uniform    0;
    }

    front_back_empty
    {
        type    empty
    }
}


// ************************************************************************* //
p
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [1 -1 -2 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    "(cylinder|up_wall|down_wall)"
    {
        type            zeroGradient;
    }
    inlet
    {
        type            zeroGradient;
        //type            mixed;
        refValue        uniform ;
        refGradient     uniform 0;
        valueFraction   uniform 0;
    }
    outlet
    {
        type            fixedValue;
        value           uniform 110000;

        //type            mixed;
        //refValue        uniform 110000;
        //refGradient     uniform 0;
        //valueFraction   uniform 1;
        //type            transonicOutletPressure;
        //U               U;
        //phi             phi;
        //gamma           1.4;
        //psi             psi;
        //pInf            uniform 110000;
    }

    front_back_empty
    {
        type    empty;

    }
}


// ************************************************************************* //
T
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
    object      T;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 0 0 1 0 0 0];

internalField   uniform 300;

boundaryField
{
    "(cylinder|up_wall|down_wall)"
    {
        type            zeroGradient;
    }

    inlet
    {
        type            fixedValue;
        value           uniform 300;
    }

    outlet
    {
        type            inletOutlet;
        //type            zeroGradient;
        value           uniform 300;
        inletValue      uniform 300;
    }

    front_back_empty
    {
        type    empty;
    }
}

// ************************************************************************* //
U
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    "(cylinder|up_wall|down_wall)"
    {
        type            noSlip;
    }
    inlet
    {
        type            fixedValue;
        value        uniform (2 0 0);
    }
    outlet
    {
        type            zeroGradient;
    }
    
    front_back_empty
    {
        type    empty;
    }
}


// ************************************************************************* //
error
Code:
/*---------------------------------------------------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
Build  : 4.1
Exec   : rhoSimpleFoam
Date   : Feb 17 2017
Time   : 14:35:44
Host   : "jan-VirtualBox"
PID    : 11498
Case   : /home/jan/open_test/cylinder_rho_simple
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations

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

Create mesh for time = 0


SIMPLE: convergence criteria
    field p     tolerance 0.001
    field U     tolerance 0.0001
    field e     tolerance 0.001
    field "(k|epsilon|omega)"     tolerance 0.001

Reading thermophysical properties

Selecting thermodynamics package 
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

#0  Foam::error::printStack(Foam::Ostream&) at ??:?
#1  Foam::sigFpe::sigHandler(int) at ??:?
#2  ? in "/lib/x86_64-linux-gnu/libc.so.6"
#3  Foam::heThermo<Foam::psiThermo, Foam::pureMixture<Foam::sutherlandTransport<Foam::species::thermo<Foam::hConstThermo<Foam::perfectGas<Foam::specie> >, Foam::sensibleInternalEnergy> > > >::heThermo(Foam::fvMesh const&, Foam::word const&) at ??:?
#4  Foam::psiThermo::addfvMeshConstructorToTable<Foam::hePsiThermo<Foam::psiThermo, Foam::pureMixture<Foam::sutherlandTransport<Foam::species::thermo<Foam::hConstThermo<Foam::perfectGas<Foam::specie> >, Foam::sensibleInternalEnergy> > > > >::New(Foam::fvMesh const&, Foam::word const&) at ??:?
#5  Foam::autoPtr<Foam::psiThermo> Foam::basicThermo::New<Foam::psiThermo>(Foam::fvMesh const&, Foam::word const&) at ??:?
#6  Foam::psiThermo::New(Foam::fvMesh const&, Foam::word const&) at ??:?
#7  ? at ??:?
#8  __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#9  ? at ??:?
Floating point exception (core dumped)
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Old   February 19, 2017, 17:31
Default
  #2
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Agustín Villa
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Location: Alcorcón
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Hi,

I am not an expert of compressible simulations, but are you sure that your pressure field is ok? In compressible flow, I think having a 0 Pa pressure is not good...

Can you show the thermophysical properties fiel
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Old   February 20, 2017, 03:42
Default
  #3
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Jan Surwiło
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Thank you for your interest in my topic. At the beginning I have to say that I'm not very good in theory of fluid flow. I used to work with Fluent and CFX and never wandering how it works deep inside. I just trust results it gives. When I start working with OpenFOAM i realized that it is necessary to understand the basics physics to calculate e.g. k and epsilon. So I have much to learn.
In Fluent and CFX it is possible to set pressure boundary condition with 0 Pa and velocity inlet for compressible (ideal gas) model. So I guess my settings are wrong.
Here is the thermophysical properties:

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "constant";
    object      thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

thermoType
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

mixture
{
    specie
    {
        nMoles      1;
        molWeight   28.9;
    }
    thermodynamics
    {
        Cp          1007;
        Hf          0;
    }
    transport
    {
        As          1.4792e-06;
        Ts          116;
    }
}


// ************************************************************************* //
BTW
I tried to find any explanation what As Ts and Hf is but I didn't find any even in FOAM guide. Is any instruction I can find all abbreviation?
Thank you in advance
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Old   October 15, 2019, 09:53
Default As, Ts Sutherland Model
  #4
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Wan Li
Join Date: Jun 2019
Location: Edinburgh
Posts: 3
Rep Power: 6
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Quote:
Originally Posted by johny0688 View Post
Thank you for your interest in my topic. At the beginning I have to say that I'm not very good in theory of fluid flow. I used to work with Fluent and CFX and never wandering how it works deep inside. I just trust results it gives. When I start working with OpenFOAM i realized that it is necessary to understand the basics physics to calculate e.g. k and epsilon. So I have much to learn.
In Fluent and CFX it is possible to set pressure boundary condition with 0 Pa and velocity inlet for compressible (ideal gas) model. So I guess my settings are wrong.
Here is the thermophysical properties:

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "constant";
    object      thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

thermoType
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

mixture
{
    specie
    {
        nMoles      1;
        molWeight   28.9;
    }
    thermodynamics
    {
        Cp          1007;
        Hf          0;
    }
    transport
    {
        As          1.4792e-06;
        Ts          116;
    }
}


// ************************************************************************* //
BTW
I tried to find any explanation what As Ts and Hf is but I didn't find any even in FOAM guide. Is any instruction I can find all abbreviation?
Thank you in advance



As and Ts relate to Sutherland model for viscosity calculation. Please check the following link : https://www.cfd-online.com/Wiki/Sutherland%27s_law


Hf = heat of fusion :

Check following link on thermodynamic models : https://www.openfoam.com/documentati...mophysical.php
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Old   June 1, 2021, 12:23
Smile
  #5
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Join Date: Mar 2019
Posts: 81
Rep Power: 7
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Quote:
Originally Posted by johny0688 View Post
Thank you for your interest in my topic. At the beginning I have to say that I'm not very good in theory of fluid flow. I used to work with Fluent and CFX and never wandering how it works deep inside. I just trust results it gives. When I start working with OpenFOAM i realized that it is necessary to understand the basics physics to calculate e.g. k and epsilon. So I have much to learn.
In Fluent and CFX it is possible to set pressure boundary condition with 0 Pa and velocity inlet for compressible (ideal gas) model. So I guess my settings are wrong.
Here is the thermophysical properties:

Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  4.1                                   |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "constant";
    object      thermophysicalProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

thermoType
{
    type            hePsiThermo;
    mixture         pureMixture;
    transport       sutherland;
    thermo          hConst;
    equationOfState perfectGas;
    specie          specie;
    energy          sensibleInternalEnergy;
}

mixture
{
    specie
    {
        nMoles      1;
        molWeight   28.9;
    }
    thermodynamics
    {
        Cp          1007;
        Hf          0;
    }
    transport
    {
        As          1.4792e-06;
        Ts          116;
    }
}


// ************************************************************************* //
BTW
I tried to find any explanation what As Ts and Hf is but I didn't find any even in FOAM guide. Is any instruction I can find all abbreviation?
Thank you in advance
Hi Jan,

I'm facing exactly the same issue with rhoSimpleFoam. Just wondering if you managed to solve the issue at the end. Please advise

Cheers,
MJ
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