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Showing results 1 to 14 of 14 Search took 0.00 seconds. Search: Posts Made By: cfd seeker

Forum: FLUENT October 22, 2012, 11:57

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker Far you have highlighted a very important point.... Far you have highlighted a very important point. Can you tell me how you approach the problem in this case if just the Re. No is given in the reference data? I normally use default values for density...

Forum: FLUENT October 22, 2012, 11:51

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker ICEM blocking topology for hexa meshing is... ICEM blocking topology for hexa meshing is awesome. The tools in the blocking has made hexa meshing relatively easy as compared to other meshers

Forum: FLUENT October 21, 2012, 03:48

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker So here you are applying "Similarity Principle",... So here you are applying "Similarity Principle", have you also changed the Re. No and Mach No. to get the exact similarity b/w the two cases?

Forum: FLUENT October 21, 2012, 03:46

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker Spot on. Thumbs up. You are 100 % right. We... Spot on. Thumbs up. You are 100 % right. We should stick to the basics first and apply proper physics to capture the desired phenomenon

Forum: FLUENT October 20, 2012, 03:39

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker Are you sure that your case is Fully turbulent... Are you sure that your case is Fully turbulent and transition is not taking place?

Forum: FLUENT October 20, 2012, 03:37

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker You don't need to worry about this, its a normal... You don't need to worry about this, its a normal situation. Wall y+ are dependent on wall shear stress and Re. No. As the Re. No is changing along the length of plate so wall y+ will be different at...

Forum: FLUENT October 18, 2012, 11:28

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker yes it has been thoroughly discussed in... yes it has been thoroughly discussed in literature that there is a mark difference b/w k-e and k-w.Standard k-e and RNG k-e under predicts separation,Realizable k-e is a bit better in capturing...

Forum: FLUENT October 18, 2012, 03:07

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker If your are fully resolving the boundary... If your are fully resolving the boundary layer(wall y+ <=1) then better use Enhanced Wall Treatment instead of wall functions. One more suggestion...use SST kw model instead of k-epsilon because...

Forum: FLUENT October 18, 2012, 03:00

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker Sorry I was busy for 2 days, I worked on your... Sorry I was busy for 2 days, I worked on your geometry and I guess I got the good blocking.min quality is 0.8 which is very good but you have to work yourself on the edge parameters and...

Forum: FLUENT October 15, 2012, 13:52

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker I will try on your geometry tomorrow morning in... I will try on your geometry tomorrow morning in the office because don't have ansys available at home

Forum: FLUENT October 15, 2012, 13:49

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker It refers to the BL thickness always use... It refers to the BL thickness always use free stream velocity to calculate Re. No yes "x" is plate length in your case(plate length in flow direction)

Forum: FLUENT October 15, 2012, 13:07

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker ohhh hold on....the link in the above post will... ohhh hold on....the link in the above post will give you B.L thickness formulae but the relation b/w length scale and B.L thickness can be found in Fluent's user manual

Forum: FLUENT October 15, 2012, 13:04

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker Ok attach your geometry file here in parasolid... Ok attach your geometry file here in parasolid format or .tin( .tin is icem format) A simple google search guides me here....http://en.wikipedia.org/wiki/Boundary-layer_thickness

Forum: FLUENT October 15, 2012, 12:16

Replies: 80 Turbulent Boundary condition, viscosity ratio and length scale Views: 15,078 Posted By cfd seeker @Bollonga Few points 1. There is a large... @Bollonga Few points 1. There is a large transition in mesh size at the interface of structured and unstructured part of mesh....it can cause problems...try to correct it 2. BTW why you are...

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