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-   -   Rotating wall velocity boundary condition for axisymmetric flow problem (http://www.cfd-online.com/Forums/su2/113855-rotating-wall-velocity-boundary-condition-axisymmetric-flow-problem.html)

diwakaranant February 28, 2013 02:00

Rotating wall velocity boundary condition for axisymmetric flow problem
 
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Hello

I am trying to solve flow between two rotating cylinders having a rotating
circular ring in the annulus. The cylinder walls and the ring are rotating
with different angular velocities. I have taken a wedge shape domain
with front and back faces as "periodic walls". This type of flow has
non-zero swirl, radial and axial velocities, which do not vary with azimuthal angle.

The walls are kept as some temperatures, say 300 K.

Hence I wanted to know whether we can apply rotating wall velocity
conditions at different walls, in non-rotating frame of reference, in SU2 ?

Also, I wanted to know whether we can have single cell in the azimuthal
direction ? (between periodic front and back walls)

The schematic of the problem is attached with the post.

Thanks
Anant

fpalacios March 24, 2013 00:45

Quote:

Originally Posted by diwakaranant (Post 410569)
Hello

I am trying to solve flow between two rotating cylinders having a rotating
circular ring in the annulus. The cylinder walls and the ring are rotating
with different angular velocities. I have taken a wedge shape domain
with front and back faces as "periodic walls". This type of flow has
non-zero swirl, radial and axial velocities, which do not vary with azimuthal angle.

The walls are kept as some temperatures, say 300 K.

Hence I wanted to know whether we can apply rotating wall velocity
conditions at different walls, in non-rotating frame of reference, in SU2 ?

Also, I wanted to know whether we can have single cell in the azimuthal
direction ? (between periodic front and back walls)

The schematic of the problem is attached with the post.

Thanks
Anant

Dear Anant,
Thanks you for your interest in SU2. The current implementation v2.0.2 requires a hub, and at least 3 cells in the azimuthal direction.

It is very easy to impose a different velocity to each surface with a small modification of the subroutine
void CNSSolution::BC_NS_Wall(CGeometry *geometry, CSolution **solution_container, CNumerics *solver, CConfig *config, unsigned short val_marker)

or

void CEulerSolution::BC_Euler_Wall(CGeometry *geometry, CSolution **solution_container, CNumerics *solver, CConfig *config, unsigned short val_marker)

for inviscid flows.

both subroutines are in solution_direct_mean.cpp

Best,
Francisco


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