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-   -   Velocity vector in backward-facing step microchannel (http://www.cfd-online.com/Forums/main/102018-velocity-vector-backward-facing-step-microchannel.html)

warlocklw May 20, 2012 05:44

Velocity vector in backward-facing step microchannel
 
My project is fluid laminar flow BFS microchannel with 25% step height and increasing Reynolds number.

http://i911.photobucket.com/albums/a...locklw/bfs.jpg

I'm investigating on velocity vector by view towards outlet. I put 2 planes, that is before and after step height.

Plane before step height experience little changes, however velocity vector after step height experience big changes when view from outlet.

http://i911.photobucket.com/albums/a...rlocklw/v1.jpg
http://i911.photobucket.com/albums/a...rlocklw/v2.jpg

6 boxes above is view towards outlet for velocity vector after step height area, from which [upper to lower pictures] are [low velocity to high velocity] respectively. Can someone please help me explain the phenomena above?

Any help is greatly appreciated. Thanks in advanced.


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