DSMC results of low-Mach flow over circular cylinder

flotus1 · November 8, 2012, 05:07

I am currently studying the flow over blunt bodies in the slip-flow and transitional regime (Knudsen number >0).
For benchmark purposes in the rarefied regime, DSMC (direct simulation monte carlo) is the numerical approach of choice.

I found a ton of papers with DSMC calculations for the super- and hypersonic flow over circular cylinders, but not a single calculation for low-Mach flows.
I know, the computational cost of a DSMC scales with Ma^-2, so it is natural that there are more results for Ma>>1.

But in the last few years, variance reduction Methods for DSMC were developed (like IPDSMC or LVDSMC) that remove the Ma^-2 dependency.
Unfortunately, the authors of these methods only tested their codes for channel flows (Couette and Poiseuille). So here is the question:

Does anyone have DSMC-like results for the low-Mach flow over circular cylinders or knows where they are to be found?

Many thanks in advance.

flotus1 · November 9, 2012, 09:41

It would already help if someone knew that there are no such computations available so far.

flotus1 · November 13, 2012, 11:37

Why is nobody replying to my threads

November 8, 2012, 05:07	DSMC results of low-Mach flow over circular cylinder	#1
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,428 Rep Power: 49	I am currently studying the flow over blunt bodies in the slip-flow and transitional regime (Knudsen number >0). For benchmark purposes in the rarefied regime, DSMC (direct simulation monte carlo) is the numerical approach of choice. I found a ton of papers with DSMC calculations for the super- and hypersonic flow over circular cylinders, but not a single calculation for low-Mach flows. I know, the computational cost of a DSMC scales with Ma^-2, so it is natural that there are more results for Ma>>1. But in the last few years, variance reduction Methods for DSMC were developed (like IPDSMC or LVDSMC) that remove the Ma^-2 dependency. Unfortunately, the authors of these methods only tested their codes for channel flows (Couette and Poiseuille). So here is the question: Does anyone have DSMC-like results for the low-Mach flow over circular cylinders or knows where they are to be found? Many thanks in advance.

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November 9, 2012, 09:41		#2
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,428 Rep Power: 49	It would already help if someone knew that there are no such computations available so far.

November 13, 2012, 11:37		#3
flotus1 Super Moderator Alex Join Date: Jun 2012 Location: Germany Posts: 3,428 Rep Power: 49	Why is nobody replying to my threads