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PimpleDyMFoam --Simulate turbulence caused by moving object

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Old   January 13, 2018, 05:10
Default PimpleDyMFoam --Simulate turbulence caused by moving object
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Hi, I would like to simulate the turbulence and airflow caused by the movement of elevator car in the shaft, including the airflow surrounding the car and within the whole shaft.

I set my initial condition as:
U
internalField uniform (0 0 0);

boundaryField
{
carTop
{
type movingWallVelocity;
value $internalField;
}
carSide
{
type movingWallVelocity;
value $internalField;
}
carBase
{
type movingWallVelocity;
value $internalField;
}


shaftTop
{
type zeroGradient;
}
shaftSide
{
type fixedValue;
value uniform (0 0 0);
}
shaftBase
{
type fixedValue;
value uniform (0 0 0);
}

P
internalField uniform 0;

boundaryField
{
carTop
{
type zeroGradient;
}
carSide
{
type zeroGradient;
}
carBase
{
type zeroGradient;
}

shaftTop
{
type totalPressure;
p0 uniform 0;
}
shaftSide
{
type zeroGradient;
}
shaftBase
{
type zeroGradient;
}

k
internalField uniform 0.375;

boundaryField
{
carTop
{
type kqRWallFunction;
value uniform 0.375;
}
carSide
{
type kqRWallFunction;
value uniform 0.375;
}
carBase
{
type kqRWallFunction;
value uniform 0.375;
}

shaftTop
{
type zeroGradient;
}
shaftSide
{
type kqRWallFunction;
value uniform 0.375;
}
shaftBase
{
type kqRWallFunction;
value uniform 0.375;
}

epsilon
internalField uniform 14.855;

boundaryField
{
carTop
{
type epsilonWallFunction;
value uniform 14.855;
}
carSide
{
type epsilonWallFunction;
value uniform 14.855;
}
carBase
{
type epsilonWallFunction;
value uniform 14.855;
}

shaftTop
{
type zeroGradient;
}
shaftSide
{
type epsilonWallFunction;
value uniform 14.855;
}
shaftBase
{
type epsilonWallFunction;
value uniform 14.855;
}

nut
internalField uniform 0;

boundaryField
{
carTop
{
type nutkWallFunction;
value uniform 0;
}
carSide
{
type nutkWallFunction;
value uniform 0;
}
carBase
{
type nutkWallFunction;
value uniform 0;
}
shaftTop
{
type zeroGradient;
}
shaftSide
{
type nutkWallFunction;
value uniform 0;
}
shaftBase
{
type nutkWallFunction;
value uniform 0;
}

I expect to see some velocity or pressure contour, but the U and P is uniform along the shaft and throughout car surface. I had attached the picture for results.
U.jpg

P.jpg

k.jpg

epsilon.jpg

nut.jpg

Sorry for my dummy question. I would be very grateful if there's someone to suggest any correction to be done. Thanks
jiahui_93 is offline   Reply With Quote

Old   January 13, 2018, 05:17
Default Velocity contour aimed to get
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simplecar.PNG

movingcone.jpg
I'm sorry. But my post had limited 5 attachments. So I posted another to attach the picture i aim to get. Thanks
Attached Images
File Type: png movingcone.PNG (41.3 KB, 12 views)

Last edited by jiahui_93; January 14, 2018 at 10:42.
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