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Initializing inlet velocity for a wedged mesh?

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Old   June 27, 2019, 10:55
Default Initializing inlet velocity for a wedged mesh?
  #1
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anu
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Hi everyone! I'm trying to simulate laminar flow over a delta wing, and have been running into some problems.
I wanted an inlet velocity parallel to the z axis, so it would flow over the delta wing parallel to its symmetric axis. However, the velocity in paraView appears to be flowing along the x axis. Could someone help me with this?
I've attached a drawing to give you a sense of what I want.
Here is my blockMeshDict:


Quote:
convertToMeters 0.1;

vertices
(
(0 0 0) //0
(-0.5 0 -2) //1
(0.5 0 -2) //2
(0 -2 0) //3
(-0.5 -2 -2) //4
(0.5 -2 -2) //5
);

blocks
(
hex (0 1 2 0 3 4 5 3) (50 1 200) simpleGrading (0.2 1 1)
);

edges
(
);

boundary
(
axis
{
type empty;
faces
(
(0 3 3 0)
);
}
plate
{
type plate;
faces
(
(3 4 5 3)
);
}
outlet
{
type patch;
faces
(
(4 1 2 5)
);
}
inlet1
{
type patch;
faces
(
(3 0 2 5)
);
}
top
{
type symmetry;
faces
(
(0 1 2 0)
);
}
inlet2
{
type patch;
faces
(
(1 4 3 0)
);
}
);

mergePatchPairs
(
);


and my U file:


Quote:
dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
axis
{
type empty;
}

outlet
{
type zeroGradient;
}

inlet1
{
type fixedValue;
value uniform (0 0 -0.1);
}

inlet2
{
type fixedValue;
value uniform (0 0 -0.1);
}

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

top
{
type symmetry;
}

}

I'd appreciate any help!
Attached Images
File Type: png 200-flatplate.png (142.9 KB, 6 views)
Attached Files
File Type: pdf drawing wedgeTest deltaPlate.pdf (10.6 KB, 1 views)
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Old   June 28, 2019, 05:18
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  #2
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Zander Meiring
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For your internal field (all mesh that isn't boundary) is set to 0 in all directions. If you want to initilize your flow, you can set your internal field to have some velocity in the z direction, ie:

Code:
internalField uniform (0 0 0.1)
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Old   June 28, 2019, 11:14
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anu
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Hi, thanks for replying
I tried changing it and it doesn't seem to have made a difference? Does it have to do with the coordinate system I'm using?
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inlet velocity, velocity angle, wedge block

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