Vortex method vs Spectral synthesizer for LES

January 8, 2007, 12:06

Hello!

I am going to do LES simulations and have become a bit curious about the two different boundary conditions for generation of vorticity. I can see from the manual what the Vortex method does, but there is not much written on the Spectral synthesizer really. Can anyone with experience from LES simulations recommend one of them over the other, or does it not matter much? I will know fairly well what kind of turbulence I have at the inlet (from k-e or RSM simulations).

If using the Spectral synthesizer, it is also necessary to specify the Reynolds stresses at the inlet. Why is this (i.e. how does the Spectral synthesizer method use this information)?

Thank you in advance for any information on these matters!

/Henrik

raunakjung · February 14, 2017, 02:46

http://www.afs.enea.it/project/neptu.../th/node96.htm

January 8, 2007, 12:06	Vortex method vs Spectral synthesizer for LES	#1
HS Guest Posts: n/a	Hello! I am going to do LES simulations and have become a bit curious about the two different boundary conditions for generation of vorticity. I can see from the manual what the Vortex method does, but there is not much written on the Spectral synthesizer really. Can anyone with experience from LES simulations recommend one of them over the other, or does it not matter much? I will know fairly well what kind of turbulence I have at the inlet (from k-e or RSM simulations). If using the Spectral synthesizer, it is also necessary to specify the Reynolds stresses at the inlet. Why is this (i.e. how does the Spectral synthesizer method use this information)? Thank you in advance for any information on these matters! /Henrik

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February 14, 2017, 02:46		#2
raunakjung Senior Member raunak jung pandey Join Date: Jun 2016 Posts: 102 Rep Power: 9	http://www.afs.enea.it/project/neptu.../th/node96.htm