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-   -   Meshing a bent coronary (like pipe) with stenosis (narrowing) (http://www.cfd-online.com/Forums/openfoam-meshing-blockmesh/88164-meshing-bent-coronary-like-pipe-stenosis-narrowing.html)

RugbyGandalf May 10, 2011 07:09

Meshing a bent coronary (like pipe) with stenosis (narrowing)
 
4 Attachment(s)
Hi there :)

i am trying to simulate the flow in a coronary with narrowing (75% area stenosis)...

Therefor i would like to create a mesh with blockMesh. I already have some results, but they are not satisfying :(
The problem is, to get the curved and narrowed part generated without any inconstancies.
I defined the points, for the middle of the bent part (45 degrees) and created arc - edges from the ending of the unbent cylinders to the middle plane, with calculated points for the arcs. The arc - points are points of a circle, lying in an angle of 22.5 degrees to the ending cylinder and the middle circle. As you could see on the pictures, one will get inconstancies with this method :(
I hope this was not to complicating - maybe the pictures will show what i mean!!!

Now the most important question: does anyone have an idea, how to solve this problem?

Regards,

Martin

MartinB May 10, 2011 07:23

Hi Martin,

you can try to use splines instead of arcs. The bend will be modeled with 5 hex blocks instead of 10.
Or have a try with discretizer...

Martin

RugbyGandalf May 10, 2011 07:33

1 Attachment(s)
dear Martin (nice Name ;)

if i already tried to mesh it with only 5 blocks - the result is to be seen below...

I think i will need the middle circle, for getting the guaranty, that it is a circle cross section at each point of the line...

RugbyGandalf May 10, 2011 11:21

1 Attachment(s)
I adapted the arc - interpolation coordinates a little bit - below you will see the result!!!

One problem is left: the inconstancies at the end of the curved part...

Does anyone have an idea how to solve this?

I will try a little bit with splineLines as edges - maybe results will get better..!?


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