Enstrophy transport equation

okcfdlab · June 18, 2015, 15:02

Hello all, I know that OpenFOAM can calculate enstrophy, but has anyone tried to calculate the terms in the enstrophy transport equation (ETE)?

The ETE is derived in e.g. Tennekes and Lumley, and corresponds to Eqn. (11) in the below linked document:

http://ntrs.nasa.gov/archive/nasa/ca...0140000501.pdf

okcfdlab · March 4, 2016, 15:13

I've solved this through writing a utility enstrophyTransport: https://github.com/okcfdlab/enstrophyTransport.git

It generates the enstrophy production, dissipation, diffusion, and transport fields as volScalarFields and writes for each timestep.

It is a post-processing utility akin to $FOAM_APPBIN/vorticity that works on completed timesteps. It also assumes that a mean velocity field (UMean) is available in each timestep folder.

If anyone wishes to use or modify this utility, if you find bugs, or if you can suggest improvements, I'm happy to hear your feedback.

Cheers!

June 18, 2015, 15:02	Enstrophy transport equation	#1
okcfdlab New Member Joshua Brinkerhoff Join Date: Nov 2014 Location: Kelowna, BC Canada Posts: 3 Rep Power: 11	Hello all, I know that OpenFOAM can calculate enstrophy, but has anyone tried to calculate the terms in the enstrophy transport equation (ETE)? The ETE is derived in e.g. Tennekes and Lumley, and corresponds to Eqn. (11) in the below linked document: http://ntrs.nasa.gov/archive/nasa/ca...0140000501.pdf

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March 4, 2016, 15:13		#2
okcfdlab New Member Joshua Brinkerhoff Join Date: Nov 2014 Location: Kelowna, BC Canada Posts: 3 Rep Power: 11	I've solved this through writing a utility enstrophyTransport: https://github.com/okcfdlab/enstrophyTransport.git It generates the enstrophy production, dissipation, diffusion, and transport fields as volScalarFields and writes for each timestep. It is a post-processing utility akin to $FOAM_APPBIN/vorticity that works on completed timesteps. It also assumes that a mean velocity field (UMean) is available in each timestep folder. If anyone wishes to use or modify this utility, if you find bugs, or if you can suggest improvements, I'm happy to hear your feedback. Cheers!