Vortex method

thomas_eschbacher · April 28, 2008, 13:23

hi!

i would like to know if anyone here has experiences with the vortex method like discribed in the wikipedia (http://tinyurl.com/4tar82)?

i`m interested in external aerodynamics,.. especially incompressible turbulent (Re > 10^5-10^6) flows around buildings and bridge decks. Of course, lift and drag is my main concern.

in my opinion a mesh-free method would be nice, particularly because the area of interest is very small in relation to the whole discretization area.

i) can i do this with openfoam?
ii) has someone done this with openfoam before?

thanks a lot!

thomas

albcem · July 24, 2009, 06:42

Hello Thomas,

I developed a vortex element based solver in the past. I do not think OpenFOAM is an appropriate tool for this given it is based on finite volume method (grid based). The type of equations solved are completely different and there needs to be appropriate mechanisms to release vortex particles to the simulation domain based on the boundary conditions. The number of particles grow fast, hence you need a descent way for parallel decomposition of the moving particles. There are several other complications associated with O(N^2) particle interactions requiring cluster algorithms...

You are much better off sticking to what OpenFOAM has to offer or finding another appropriate solver for the vortex based solution.

Cem

mpbinil · January 22, 2012, 13:07

hello mr thomas is it necessary to grow particles ,when computation is for a very short period

April 28, 2008, 13:23	hi! i would like to know if	#1
thomas_eschbacher New Member thomas eschbacher Join Date: Mar 2009 Location: austria Posts: 1 Rep Power: 0	hi! i would like to know if anyone here has experiences with the vortex method like discribed in the wikipedia (http://tinyurl.com/4tar82)? i`m interested in external aerodynamics,.. especially incompressible turbulent (Re > 10^5-10^6) flows around buildings and bridge decks. Of course, lift and drag is my main concern. in my opinion a mesh-free method would be nice, particularly because the area of interest is very small in relation to the whole discretization area. i) can i do this with openfoam? ii) has someone done this with openfoam before? thanks a lot! thomas

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July 24, 2009, 06:42		#2
albcem Member Cem Albukrek Join Date: Mar 2009 Posts: 52 Rep Power: 17	Hello Thomas, I developed a vortex element based solver in the past. I do not think OpenFOAM is an appropriate tool for this given it is based on finite volume method (grid based). The type of equations solved are completely different and there needs to be appropriate mechanisms to release vortex particles to the simulation domain based on the boundary conditions. The number of particles grow fast, hence you need a descent way for parallel decomposition of the moving particles. There are several other complications associated with O(N^2) particle interactions requiring cluster algorithms... You are much better off sticking to what OpenFOAM has to offer or finding another appropriate solver for the vortex based solution. Cem

January 22, 2012, 13:07		#3
mpbinil New Member binil Join Date: Jul 2011 Posts: 1 Rep Power: 0	hello mr thomas is it necessary to grow particles ,when computation is for a very short period