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-   -   Scour around vertical cylinder (http://www.cfd-online.com/Forums/flow-3d/122830-scour-around-vertical-cylinder.html)

pyxbird August 29, 2013 02:09

Scour around vertical cylinder
 
3 Attachment(s)
Dear all,
Hi, I am simulating scour around a vertical cyliner subjected to steady current. Here is the parameters:
1. The mean velocity of the current is 44.1cm/s, and the inlet boundary is "Grid Overlay", which means the current is developed.
2. The diameter of the cylinder is 10cm, and the height of it is 25cm.
3. Before simulating scour, simulation of flow pattern around the cylinder without sediment is taken, vortexes can be found and the size of the grid is ok.
4. Other parameters of the sediment are shown in the attachment.
The problem is:
The process of scour is quite slow that no apparent scour pattern can be found around the vertical cylinder. In other words, the cylinder seems to contribute little to the process of the sediment scour, why?:confused:

pyxbird August 29, 2013 02:11

In addition, long long time is gone but the scour pattern is still not apparent.

mahdi1 September 10, 2013 16:06

Quote:

Originally Posted by pyxbird (Post 448653)
In addition, long long time is gone but the scour pattern is still not apparent.

try to use LES model instead of RNG model

pyxbird September 17, 2013 20:56

1 Attachment(s)
The result is not good.

mahdi1 September 18, 2013 04:11

send me your prepin file.

miss miti December 25, 2013 03:28

Quote:

Originally Posted by pyxbird (Post 448653)
In addition, long long time is gone but the scour pattern is still not apparent.

Hi
I have the same problem but my model is a pipeline, could you find out the reason of not appearing scour?


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