[Vishsel]

Hi all,

I have an issue in pressure values. my case has totally 3 fluid domains.
1.Inlet Tank
2.Core
3.Outlet Tank

I want to monitor pressure at between the fluid domains (boundary faces) ie. boundary face between inlet tank and core, core and outlet tank.

and i will calculate pressure drop manually by dp = inlet tank (in face) - inlet tank (out face ie.boundary face between inlet tank and core)

And pressure drop result should be higher in inlet tank and less in outlet tank than the inlet tank.

But from my CFD simulation result, it was opposite now.

And i will monitor the pressure values in between the domains by creating Iso-surface (by transfering to fluent)

Is there any problem in boundary conditions ?? if it is there please correct me..

0/U dictionary file

massflow-inlet
    {
        type            flowRateInletVelocity;
        massFlowRate    constant value;
        value           uniform (0 0 0);
        rho             rho;
        rhoInlet        value;
    }
    
    pressure-outlet
    {
        type            inletOutlet;
        value           uniform (0 0 0);
        inletValue      uniform (0 0 0);
    }
    
    wall-inlet-tank
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    
    wall-outlet-tank
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    
    wall-core
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }

0/p

internalField   uniform 98.211;

boundaryField
{
    wall-outlet-tank      
    {
        type            zeroGradient;
    }
    
    wall-inlet-tank
    {
        type            zeroGradient;
    }

    wall-core
    {
        type            zeroGradient;
    }
    
    massflow-inlet
    {
        type            zeroGradient;
    }
    
    pressure-outlet
    {
        type            fixedValue;
        value           $internalField;
    }
}

Help me.. This struggling me a lot.

Thank you,
Vishsel