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Use "bounded" in scheme or not to use?

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Old   June 11, 2013, 16:20
Default Use "bounded" in scheme or not to use?
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Ehsan
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Hi
I have read that page in openfoam.org about the change in 2.2.0 version and adding bounded to time and div schemes.but haven't understood that I need to use bounded in time and dive terms or not certainly.
I use now fvScheme as:
Code:
fluxScheme      Kurganov;

ddtSchemes
{
    default         bounded CrankNicolson .5;
    //ddt(rho)        CrankNicolson .5;
    //ddt(rhoU)       CrankNicolson .5;
    //ddt(rhoE)       Euler;
    //ddt(rho,U)      Euler;
    //ddt(rho,e)      Euler;
    //ddt(rho,h)      Euler;
    //ddt(rho,omega)  Euler;
    //ddt(rho,k)      Euler;
    //ddt(rho,gas)    Euler;
}

gradSchemes
{
    default         none;
    grad(U) Gauss linear;
    grad(rho) Gauss linear;
    grad(rhoU) Gauss linear;
    grad((1|psi)) Gauss linear;
    grad(e) Gauss linear;
    grad((1|thermo:psi)) Gauss linear;
    grad(h) Gauss linear;
    grad(sqrt(((Cp|Cv)*(1|psi)))) Gauss linear;
    grad(sqrt(((Cp|Cv)*(1|thermo:psi)))) Gauss linear;
    grad(T) Gauss linear;
    grad(omega) Gauss linear;
    grad(k) Gauss linear;
    grad(gas) Gauss linear;
}

divSchemes
{
    default none;
    div(tauMC) Gauss linear;
    div(phi) bounded Gauss linearUpwindV;
    div(phi,omega) bounded Gauss linearUpwind grad(omega);
    div(phi,k) bounded Gauss linearUpwind grad(k);
    div(phi,gas) Gauss limitedLimitedLinear 1 0 1;
    div(phi,epsilon) bounded Gauss linearUpwind grad(epsilon);
}

laplacianSchemes
{
    default         none;
    laplacian(muEff,U) Gauss linear corrected;
    laplacian(alphaEff,e) Gauss linear corrected;
    laplacian(alpha,e) Gauss linear corrected;
    laplacian(k,T) Gauss linear corrected;
    laplacian(DepsilonEff,omega) Gauss linear corrected;
    laplacian(DkEff,k) Gauss linear corrected;
    laplacian(DomegaEff,omega) Gauss linear corrected;
    laplacian(alphaEff,h) Gauss linear corrected;
    laplacian(muEff,gas) Gauss linear corrected;
}

interpolationSchemes
{
    default none;
    reconstruct(rho) vanLeer;
    reconstruct(U) vanLeerV;
    reconstruct(T) vanLeer;
    interpolate(rho) linear;
    interpolate(U) linear;
    interpolate(rhoU) linear;
    interpolate(muEff) linear;
    interpolate(tauMC) linear;
}

snGradSchemes
{
    default none;

    snGrad(U) corrected;

}
is it true? my case is compressible and unsteady like a shock tube.
thank anybody helps for clarification.
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