Difference between laminar and turbulent separatio
What is the difference between laminar (LS) and turbulent separation (TS) for a flow over circular cylinder?
|
Re: Difference between laminar and turbulent separ
If it's any help try Dimples on Golf Balls for an explanation of laminar and turbulent boundary layer separation over a sphere - I think you'll find the reasoning similar to the flow over a cylinder.
|
Re: Difference between laminar and turbulent separ
What difference do you want to know about?
The turbulent one will have a smaller wake, this is why skaters use strips on their arms (streamlined shapes like cycling helmets are not allowed for them). |
Re: Difference between laminar and turbulent separ
Thanks. In one paper by Trevin et. al, he talks about LS (laminar separation) and TS (turbulent separation) at Re=140000. How can we get laminar or turbulent separation using the same code?
|
Re: Difference between laminar and turbulent separ
First of all, I suppose your code is 2D.
Does it have a transition model? |
Re: Difference between laminar and turbulent separ
My code is 3D DES using S-A turbulence model.
|
Re: Difference between laminar and turbulent separ
Ooh, isn't that a bit heavy for cylinder flow? Why don't you use a 2D solver? You run in fully turbulent then I suppose?
Anyway, if you only want to see the difference in the wake for engineering purposes, I think it's tabulated somewhere, maybe in the drag book by Hoerner. |
All times are GMT -4. The time now is 21:22. |