Reynolds-Averaged Navier–Stokes (RANS) models remain the most common design tool in a wide variety of fluid mixing applications. This includes variable-density turbulent mixing as occurs in inertial confinement fusion. The present work extends validation of the BHR-2 RANS model for variable-density turbulence to a two-dimensional Rayleigh–Taylor test case, the “tilted-rig.” The combined effects of bulk fluid motion and turbulence model behavior are discussed, and several quantities of interest are shown to demonstrate the capability of a four-equation turbulence model to describe this type of two-dimensional turbulent mixing. More generally, the tilted-rig test problem is shown to be a useful exercise for RANS model validation.
The Tilted Rocket Rig: A Rayleigh–Taylor Test Case for RANS Models1
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 2, 2013; final manuscript received May 13, 2014; published online July 9, 2014. Assoc. Editor: Oleg Schilling.
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Denissen, N. A., Rollin, B., Reisner, J. M., and Andrews, M. J. (July 9, 2014). "The Tilted Rocket Rig: A Rayleigh–Taylor Test Case for RANS Models." ASME. J. Fluids Eng. September 2014; 136(9): 091301. https://doi.org/10.1115/1.4027776
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