管道流动

[zhanghan]

Time = 1

smoothSolver:  Solving for Ux, Initial residual = 1, Final residual = 0.0615517, No Iterations 5
smoothSolver:  Solving for Uy, Initial residual = 1, Final residual = 0.0904678, No Iterations 6
smoothSolver:  Solving for Uz, Initial residual = 1, Final residual = 0.0968292, No Iterations 4


--> FOAM FATAL ERROR: 
Continuity error cannot be removed by adjusting the outflow.
Please check the velocity boundary conditions and/or run potentialFoam to initialise the outflow.
Total flux              : 5.43787
Specified mass inflow   : 0.004
Specified mass outflow  : 0
Adjustable mass outflow : 8.2387e-75


    From function adjustPhi(surfaceScalarField&, const volVectorField&,volScalarField&)
    in file cfdTools/general/adjustPhi/adjustPhi.C at line 114.

FOAM exiting

请问有哪位知道这是怎么回事吗？？？
望指点！！

[CFD中文网]

一般是设置了不符合物理的边界条件所致。贴边界条件看看。

[zhanghan]

@cfd-china
您好！
边界条件如下，我添加了重力场

    object      p;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform 0;

boundaryField
{
    INLET
    {
        type            zeroGradient;
    }

    OUTLET
    {
        type            zeroGradient;
    }

    WALL
    {
        type            zeroGradient;
    }

}

    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform (0 0 0);

boundaryField
{
    INLET
    {
        type            fixedValue;
        value           uniform (0.1 0 0);
    }

    OUTLET
    {
        type            zeroGradient;
    }

    WALL
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
}

[赵一铭]

@zhanghan 你的压力场进出口不建议设置为全部为zeroGradient。可以把出口设置为固定值。