Prescribe vorticity as a nodal boundary?

k.vimalakanthan · September 5, 2012, 11:32

Dear all,

I was wondering if its possible to specify vorticity boundary conditions to specific nodes within the domain in CFX?

Basically I would like to model a vortex generator without the actual geometry instead prescribe the effect of the geometry at the nodes, where the vortex generator will be. May be using primitive regions? or implementing immersed boundary condition?

Please advice on literature that have done such a thing or methods such as user defined function that may help me to achieve this. Any help is greatly appreciated

Felggv · September 5, 2012, 14:35

Maybe a momentum source? Have you tried this? There's some threads here about modeling momentum sources as interfaces and etc... I believe it follows the same strategy that you're trying to apply to your problem.

September 5, 2012, 11:32	Prescribe vorticity as a nodal boundary?	#1
k.vimalakanthan Member Kisorthman Vimalakanthan Join Date: Apr 2011 Posts: 49 Rep Power: 15	Dear all, I was wondering if its possible to specify vorticity boundary conditions to specific nodes within the domain in CFX? Basically I would like to model a vortex generator without the actual geometry instead prescribe the effect of the geometry at the nodes, where the vortex generator will be. May be using primitive regions? or implementing immersed boundary condition? Please advice on literature that have done such a thing or methods such as user defined function that may help me to achieve this. Any help is greatly appreciated __________________ Kisorthman Vimalakanthan Dept. of Power and Propulsion Cranfield University Email: k.vimalakanthan@gmail.com Last edited by k.vimalakanthan; September 5, 2012 at 12:29.

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September 5, 2012, 14:35		#2
Felggv Member Felipe Gobbi Join Date: Apr 2012 Location: Brazil Posts: 76 Rep Power: 14	Maybe a momentum source? Have you tried this? There's some threads here about modeling momentum sources as interfaces and etc... I believe it follows the same strategy that you're trying to apply to your problem.