[saeed jamshidi]

Hello all,

I'm going to go through LES and I am new one of course!

However, I have read some materials that it's better to use fluctuated velocity profile at inlet instead of fixed value, but I have seen some tutorials with fixed type! this is weared to me!!!

would you tell me why there is such situation?

Besides, I have another question regarding the fluctuationScale (0.02 0.01 0.01). what are these numbers? how can I adapt it for my problem?
thank you.

/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  v2112                                 |
|   \\  /    A nd           | Website:  www.openfoam.com                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    object      U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

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

internalField   uniform (0.25 0 0);

boundaryField
{
    inlet
    {
        type            turbulentInlet;
        referenceField  uniform (0.25 0 0);
        fluctuationScale (0.02 0.01 0.01);
        value           uniform (0.25 0 0);
    }

    outlet
    {
        type            inletOutlet;
        inletValue      uniform (0 0 0);
        value           uniform (0 0 0);
    }

    top
    {
        type            slip;
    }
	
	Bottom
    {
        type            slip;
    }

    frontAndBack
    {
        type            slip;
    }

    cylinder
    {
        type            noSlip;
    }
}


// ************************************************************************* //

[saeed jamshidi]

Any idea will be appreciated.