Honda makes it possible for us to download the 3D data of their concept cars at http://honda-3d.com.
In this case, I downloaded the 3D data of PUYO, and performed a steady-state simulation using simpleFoam.
Here are the simulation setups.
Turbulence model: realizableKE
Initial Condition: generated by potentialFoam
In this case, I downloaded the 3D data of PUYO, and performed a steady-state simulation using simpleFoam.
Here are the simulation setups.
Turbulence model: realizableKE
Initial Condition: generated by potentialFoam
Relaxation factors: 0.3 for p, 0.7 for U, k, epsilon
Numerical schemes:
gradSchemes: cellMDLimited central difference
divSchemes: Gamma
laplacianSchemes: limited
snGradSchemes: limited
I used limited schemes for grad, laplacian, snGrad, because of the high max non-orthogonality (> 60).
Inlet velocity: 10 m/s
Tyre rotation: 39.8 rad/s
================================
RASProperties:
RASModel realizableKE;
turbulence on;
printCoeffs on;
fvSolution:
solvers
{
"p"
{
solver GAMG;
tolerance 1e-9;
relTol 0;
smoother GaussSeidel;
nPreSweeps 0;
nPostSweeps 2;
cacheAgglomeration true;
nCellsInCoarsestLevel 10;
agglomerator faceAreaPair;
mergeLevels 1;
}
"(U|k|epsilon)"
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-8;
relTol 0;
}
}
potentialFlow
{
nNonOrthogonalCorrectors 20;
}
SIMPLE
{
nNonOrthogonalCorrectors 2;
pRefCell 0;
pRefValue 0;
}
relaxationFactors
{
fields
{
p 0.3;
}
equations
{
U 0.7;
k 0.7;
epsilon 0.7;
}
}
fvSchemes:
ddtSchemes
{
default steadyState;
}
gradSchemes
{
default cellMDLimited Gauss linear 0.333;
}
divSchemes
{
default none;
div(phi,U) bounded Gauss GammaV 1;
div(phi,k) bounded Gauss Gamma 1;
div(phi,epsilon) bounded Gauss Gamma 1;
div((nuEff*dev(T(grad(U))))) Gauss linear;
}
laplacianSchemes
{
default Gauss linear limited 0.333;
}
interpolationSchemes
{
default linear;
}
snGradSchemes
{
default limited 0.333;
}
fluxRequired
{
default no;
p ;
}
U:
dimensions [0 1 -1 0 0 0 0];
internalField uniform (10 0 0);
boundaryField
{
inlet
{
type fixedValue;
value uniform (10 0 0);
}
outlet
{
type zeroGradient;
}
side
{
type slip;
}
car_body
{
type fixedValue;
value uniform (0 0 0);
}
car_tyre_fl
{
type rotatingWallVelocity;
origin ( -0.002252161 -0.726322139 0.2510928011 );
axis ( 0 -1 0 );
omega 39.82591279;
}
car_tyre_fr
{
type rotatingWallVelocity;
origin ( -0.002252161 0.726322139 0.2510928011 );
axis ( 0 -1 0 );
omega 39.82591279;
}
car_tyre_rl
{
type rotatingWallVelocity;
origin ( 1.8270661572 -0.726322139 0.2510928011 );
axis ( 0 -1 0 );
omega 39.82591279;
}
car_tyre_rr
{
type rotatingWallVelocity;
origin ( 1.8270661572 0.726322139 0.2510928011 );
axis ( 0 -1 0 );
omega 39.82591279;
}
ground
{
type fixedValue;
value uniform (10 0 0);
}
}
p:
dimensions [0 2 -2 0 0 0 0];
internalField uniform 0;
boundaryField{ inlet { type zeroGradient; }
outlet { type fixedValue; value uniform 0; }
side { type slip; }
car_body { type zeroGradient; } car_tyre_fl { type zeroGradient; } car_tyre_fr { type zeroGradient; } car_tyre_rl { type zeroGradient; } car_tyre_rr { type zeroGradient; }
ground { type zeroGradient; }}
k:
dimensions [0 2 -2 0 0];
internalField uniform 0.375;
boundaryField
{
inlet
{
type fixedValue;
value uniform 0.375;
}
outlet
{
type zeroGradient;
}
side
{
type slip;
}
car_body
{
type kqRWallFunction;
value uniform 0.375;
}
car_tyre_fl
{
type kqRWallFunction;
value uniform 0.375;
}
car_tyre_fr
{
type kqRWallFunction;
value uniform 0.375;
}
car_tyre_rl
{
type kqRWallFunction;
value uniform 0.375;
}
car_tyre_rr
{
type kqRWallFunction;
value uniform 0.375;
}
ground
{
type kqRWallFunction;
value uniform 0.375;
}
}
epsilon:
dimensions [0 2 -3 0 0 0 0];
internalField uniform 0.08158251199;
boundaryField{ inlet { type fixedValue; value uniform 0.08158251199; } outlet { type zeroGradient; } car_body { type epsilonWallFunction; value uniform 0.08158251199; } car_tyre_fl { type epsilonWallFunction; value uniform 0.08158251199; } car_tyre_fr { type epsilonWallFunction; value uniform 0.08158251199; } car_tyre_rl { type epsilonWallFunction; value uniform 0.08158251199; } car_tyre_rr { type epsilonWallFunction; value uniform 0.08158251199; } ground { type epsilonWallFunction; value uniform 0.08158251199; } side { type slip; }}
nut:
dimensions [0 2 -1 0 0 0 0];
internalField uniform 0;
boundaryField{ inlet { type calculated; value uniform 0; }
outlet { type calculated; value uniform 0; }
side { type calculated; value uniform 0; }
ground { type nutkWallFunction; value uniform 0; }
car_body { type nutkWallFunction; value uniform 0; } car_tyre_fl { type nutkWallFunction; value uniform 0; } car_tyre_fr { type nutkWallFunction; value uniform 0; } car_tyre_rl { type nutkWallFunction; value uniform 0; } car_tyre_rr { type nutkWallFunction; value uniform 0; }}
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