| ihu945 |
June 10, 2016 05:04 |
Question about Flow around a circular cylinder near a plane wall
3 Attachment(s)
Hello, guys.
I am a beginner of openfoam :)
I am trying some basic simulations, and I faced a weird situation now.
Attachment 48148
Attachment 48149
Attachment 48150
These are all same result.
Reynolds number is hundred, and these are velocity field.
First one is from paraFoam -block, and others are just from paraFoam.
I really have no idea why the velocity looks like that.
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 3.0.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 1 -1 0 0 0 0];
internalField uniform (0 0 0);
boundaryField
{
inlet
{
type fixedValue;
value uniform (1 0 0);
}
outlet
{
type zeroGradient;
}
top
{
type zeroGradient;
}
bottom
{
type fixedValue;
value uniform (0 0 0);
}
cylinder
{
type fixedValue;
value uniform (0 0 0);
}
sides
{
type empty;
}
}
// *************************************************************************
Code:
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object blockMeshDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
convertToMeters 1;
vertices
(
(-10 -1.5 0)
(-1.0607 -1.5 0)
(1.0607 -1.5 0)
( 10 -1.5 0)
(30 -1.5 0)
(-0.3536 -0.3536 0)
( 0.3536 -0.3536 0)
(-0.3536 0.3536 0)
( 0.3536 0.3536 0)
(-1.0607 1.0607 0)
(1.0607 1.0607 0)
(-10 5 0)
( 10 5 0)
(30 5 0)
(-10 -1.5 1)
(-1.0607 -1.5 1)
(1.0607 -1.5 1)
( 10 -1.5 1)
(30 -1.5 1)
(-0.3536 -0.3536 1)
( 0.3536 -0.3536 1)
(-0.3536 0.3536 1)
( 0.3536 0.3536 1)
(-1.0607 1.0607 1)
(1.0607 1.0607 1)
(-10 5 1)
( 10 5 1)
(30 5 1)
);
blocks
(
hex (0 1 9 11 14 15 23 25) (50 50 1) simpleGrading (1 1 1)
hex (2 3 12 10 16 17 26 24) (50 50 1) simpleGrading (1 1 1)
hex (10 12 11 9 24 26 25 23) (50 50 1) simpleGrading (1 1 1)
hex (1 5 7 9 15 19 21 23) (50 50 1) simpleGrading (1 1 1)
hex (5 1 2 6 19 15 16 20) (50 50 1) simpleGrading (1 1 1)
hex (6 2 10 8 20 16 24 22) (50 50 1) simpleGrading (1 1 1)
hex (9 7 8 10 23 21 22 24) (50 50 1) simpleGrading (1 1 1)
hex (3 4 13 12 17 18 27 26) (50 50 1) simpleGrading (1 1 1)
);
edges
(
arc 5 7 (-0.5 0 0)
arc 19 21 (-0.5 0 1)
arc 6 8 (0.5 0 0)
arc 20 22 (0.5 0 1)
arc 7 8 (0 0.5 0)
arc 21 22 (0 0.5 1)
arc 5 6 (0 -0.5 0)
arc 19 20(0 -0.5 1)
arc 9 10 (0 1.5 0)
arc 23 24 (0 1.5 1)
);
boundary
(
inlet
{
type wall;
faces
(
(25 11 0 14)
);
}
outlet
{
type wall;
faces
(
(13 27 18 4)
);
}
top
{
type wall;
faces
(
(12 11 25 26)
(13 12 26 27)
);
}
bottom
{
type wall;
faces
(
(0 1 15 14)
(1 2 16 15)
(2 3 17 16)
(3 4 18 17)
);
}
cylinder
{
type wall;
faces
(
(7 8 22 21)
(22 8 6 20)
(6 5 19 20)
(5 7 21 19)
);
}
sides
{
type empty;
faces
(
(11 12 10 9)
(0 11 9 1)
(2 10 12 3)
(9 10 8 7)
(1 9 7 5)
(1 5 6 2)
(6 8 10 2)
(12 13 4 3)
(25 23 24 26)
(14 15 23 25)
(16 17 26 24)
(23 21 22 24)
(15 19 21 23)
(15 16 20 19)
(20 16 24 22)
(26 17 18 27)
);
}
);
mergePatchPairs
(
);
And, these are my initial condition of velocity and blockmeshdict.
Please, help me.
Thank you. |
