Dynamics of the falling leaf

dimchik_b · July 17, 2023, 19:23

Hi! Could anyone advise me on CFD software that is capable to model a system where a solid body can move and turn in the flow? Let's say how a leaf will behave when it falls in the air. I looked at Solidworks and Ansys, and it looks that there the model must be fixed related to the flow.

LuckyTran · July 18, 2023, 01:38

I don't recommend having any expectations out of SolidWorks for CFD, you just take it as-is.

Ansys and all your commercial solvers do support mesh motion and morphing bodies but I do not recommend your first CFD case to have anything moving at all.

If you are interested in rag doll physics, I suggest to look into Unreal Engine.

optimux · July 19, 2023, 23:01

Hi, there are a couple of papers on this, e.g., 'Numerical simulations of falling leaves using a pseudo-spectral method with volume penalization' by Kolomenskiy, Dmitry and Schneider, Kai, 2010. They developed their own code I guess. But for CFD software I wonder if OpenFOAM can do this.

Lee34 · July 20, 2023, 00:59

Hello !

Indeed, OpenFOAM is a powerful software for computational fluid dynamics, and with proper configuration and customization, it should be able to perform similar simulations efficiently.

July 17, 2023, 19:23	Dynamics of the falling leaf	#1
dimchik_b New Member Dmitriy Join Date: Jul 2023 Posts: 1 Rep Power: 0	Hi! Could anyone advise me on CFD software that is capable to model a system where a solid body can move and turn in the flow? Let's say how a leaf will behave when it falls in the air. I looked at Solidworks and Ansys, and it looks that there the model must be fixed related to the flow.

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July 18, 2023, 01:38		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 65	I don't recommend having any expectations out of SolidWorks for CFD, you just take it as-is. Ansys and all your commercial solvers do support mesh motion and morphing bodies but I do not recommend your first CFD case to have anything moving at all. If you are interested in rag doll physics, I suggest to look into Unreal Engine.

July 19, 2023, 23:01		#3
optimux Member Mingming Zhang Join Date: Dec 2019 Posts: 35 Rep Power: 6	Hi, there are a couple of papers on this, e.g., 'Numerical simulations of falling leaves using a pseudo-spectral method with volume penalization' by Kolomenskiy, Dmitry and Schneider, Kai, 2010. They developed their own code I guess. But for CFD software I wonder if OpenFOAM can do this.

July 20, 2023, 00:59		#4
Lee34 New Member Lee Join Date: Jul 2023 Posts: 1 Rep Power: 0	Hello ! Indeed, OpenFOAM is a powerful software for computational fluid dynamics, and with proper configuration and customization, it should be able to perform similar simulations efficiently.