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Showing results 1 to 5 of 5 Search took 0.00 seconds. Search: Posts Made By: flotus1

Forum: Main CFD Forum December 4, 2012, 16:46

Replies: 17 Doubts about turbulence in a micro channel Views: 1,994 Posted By flotus1 No, I cant. But just to make this clear: Using... No, I cant. But just to make this clear: Using the cross-streamwise extent as a characteristic length makes no sense if the flow is mainly affected by the streamwise extent of the obstacle, which is...

Forum: Main CFD Forum December 3, 2012, 13:02

Replies: 17 Doubts about turbulence in a micro channel Views: 1,994 Posted By flotus1 If you expect vortex shedding behind a blunt... If you expect vortex shedding behind a blunt body, the cross-streamwise extent (in this case 0.2 mm) would be the characteristic length. But an aspect ratio of 17.5 is clearly closer to a flat plate...

Forum: Main CFD Forum December 3, 2012, 10:56

Replies: 17 Doubts about turbulence in a micro channel Views: 1,994 Posted By flotus1 For the case of the fin, if you define the... For the case of the fin, if you define the characteristic length as the extent of the fin in streamwise direction, everything changes. For a very thin fin, this case corresponds to the flow over a...

Forum: Main CFD Forum December 3, 2012, 06:36

Replies: 17 Doubts about turbulence in a micro channel Views: 1,994 Posted By flotus1 Which problems exactly are you facing? Is it that... Which problems exactly are you facing? Is it that the flow over the rectangular fin is not as you expected? How did you define the Reynolds number (especially the reference length) in this case? ...

Forum: Main CFD Forum December 3, 2012, 04:02

Replies: 17 Doubts about turbulence in a micro channel Views: 1,994 Posted By flotus1 That is the basic idea. If the flow is laminar,... That is the basic idea. If the flow is laminar, you would even introduce an error source by simulating it with a turbulence model. BTW: If the Re of your channel flow is below 2300, how do you fit...

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