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-   -   no VOrtex Shedding flow past a 2D cylinder (http://www.cfd-online.com/Forums/main/109364-no-vortex-shedding-flow-past-2d-cylinder.html)

Sufyan November 15, 2012 15:08

no VOrtex Shedding flow past a 2D cylinder
 
HI

I want to simulate vortex shedding downstream 2D circular cylinder with 200 Reynolds number, my mesh is correct.

i want to know the best turbulence model to get accurate and better results, i have simulated first using laminar model and got VS

I am asked to do this using some turbulent model

k-epsilon
k-omega or any one else


suggest me please with reason


Thanks in advance

ogloth November 15, 2012 15:48

Re 200 is laminar!

FMDenaro November 15, 2012 16:07

Quote:

Originally Posted by ogloth (Post 392351)
Re 200 is laminar!


;) Indeed, is a flow condition very easy to solve for all the flow scales, no turbulence model is necessary, only a good mesh

Sufyan November 15, 2012 16:37

Quote:

Originally Posted by FMDenaro (Post 392356)
;) Indeed, is a flow condition very easy to solve for all the flow scales, no turbulence model is necessary, only a good mesh


thank you , can i do my research work on the basis of laminar model for a publication
second is someone told me that laminar model is ideal model , and if i want to simaulate transient flow in fluent i have to use any other model ,


is it right?


thanks

FMDenaro November 15, 2012 16:43

Quote:

Originally Posted by Sufyan (Post 392362)
thank you , can i do my research work on the basis of laminar model for a publication
second is someone told me that laminar model is ideal model , and if i want to simaulate transient flow in fluent i have to use any other model ,


is it right?


thanks

what "ideal model" stands for you?

Sufyan November 15, 2012 16:49

Quote:

Originally Posted by FMDenaro (Post 392368)
what "ideal model" stands for you?


he(a senior student) told me laminar model is not suitable , ideal doesnt means best for my case , ideal in sanse like carnot cycle which is ideal but do not exist,

means i can not present results based on laminar model ..

agd November 15, 2012 18:30

Your friend is wrong. Laminar flow is quite real and at a Re=200 the flow around a cylinder is laminar, even in the real world.

Far November 16, 2012 02:13

I did it again recently. Do you need all files? See this thread, you will very useful info here http://www.cfd-online.com/Forums/ans...cylinders.html


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