naca12 laminar pimpleFoam
Hello, i'm new openfoam and try solve flow for naca12 with pimpleFoam in piso mode. airfoil in midle channel i use foamextend4. pimpleFoam always crash on second time step even if time step very smal. i dont know what problem is. anyone help? this is output
Code:
pimpleFoam
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | foam-extend: Open Source CFD |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: http://www.foam-extend.org |
| \\/ M anipulation | For copyright notice see file Copyright |
\*---------------------------------------------------------------------------*/
Build : 4.0-10298020aac7
Exec : pimpleFoam
Date : Mar 16 2018
Time : 19:57:17
Host : carrera
PID : 20863
CtrlDict : "/home/uniciti/foam/uniciti-4.0/test/testCase-NACA0012/system/controlDict"
Case : /home/uniciti/foam/uniciti-4.0/test/testCase-NACA0012
nProcs : 1
SigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time
Create mesh for time = 0
From function void polyMesh::initMesh()
in file meshes/polyMesh/polyMeshInitMesh.C at line 81
Truncating neighbour list at 87789 for backward compatibility
PIMPLE: Operating solver in PISO mode
Reading field p
Reading field U
Reading/calculating face flux field phi
Selecting incompressible transport model Newtonian
Selecting turbulence model type RASModel
Selecting RAS turbulence model laminar
Reading field aU if present
Starting time loop
Courant Number mean: 0.0274887 max: 0.507163 velocity magnitude: 0.5
Creating minMaxField for field U
Creating minMaxField for field p
Time = 0.001
PIMPLE: iteration 1
BiCGStab: Solving for Ux, Initial residual = 0.999999, Final residual = 1.66924e-10, No Iterations 2
BiCGStab: Solving for Uy, Initial residual = 1, Final residual = 1.40851e-10, No Iterations 2
GAMG: Solving for p, Initial residual = 1, Final residual = 7.57375e-07, No Iterations 31
time step continuity errors : sum local = 2.22698e-12, global = -8.61863e-21, cumulative = -8.61863e-21
ExecutionTime = 0.59 s ClockTime = 0 s
Courant Number mean: 0.0281978 max: 0.791337 velocity magnitude: 1.0436
Field U magnitude min = 0 max = 0.742286
Field p min = -2.04446 max = 3.70447
Time = 0.002
PIMPLE: iteration 1
BiCGStab: Solving for Ux, Initial residual = 0.028756, Final residual = 4.02589e-07, No Iterations 1
BiCGStab: Solving for Uy, Initial residual = 0.0292767, Final residual = 3.73316e-07, No Iterations 1
Floating point exception
pressure boundary condition
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 1.5-dev |
| \\ / A nd | Revision: 1326 |
| \\/ M anipulation | Web: http://www.OpenFOAM.org |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volScalarField;
location "0";
object p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 2 -2 0 0 0 0];
internalField uniform 0;
boundaryField
{
sides
{
type empty;
}
airfoil
{
type zeroGradient;
}
top
{
type zeroGradient;
}
bottom
{
type zeroGradient;
}
inlet
{
type zeroGradient;
}
outlet
{
type fixedValue;
value uniform 0;
}
}
// ************************************************************************* //
velcocity boundary condition
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | foam-extend: Open Source CFD |
| \\ / O peration | Version: 4.0 |
| \\ / A nd | Web: http://www.foam-extend.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
location "0";
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [ 0 1 -1 0 0 0 0 ];
internalField uniform ( 0.5 0 0 );
boundaryField
{
sides
{
type empty;
}
airfoil
{
type fixedValue;
value uniform ( 0 0 0 );
}
top
{
type fixedValue;
value uniform ( 0 0 0 );
}
bottom
{
type fixedValue;
value uniform ( 0 0 0 );
}
inlet
{
type fixedValue;
value uniform ( 0.5 0 0 );
}
outlet
{
type inletOutlet;
inletValue uniform ( 0 0 0 );
value uniform ( 0.5 0 0 );
}
}
|
