In this paper, we consider the evolution of decaying homogeneous anisotropic turbulence without mean velocity gradients, where only the slow pressure rate of strain is nonzero. A higher degree nonlinear return-to-isotropy model has been developed for the slow pressure–strain correlation, considering anisotropies in Reynolds stress, dissipation rate, and length scale tensor. Assumption of single length scale across the flow is not sufficient, from which stems the introduction of length scale anisotropy tensor, which has been assumed to be a linear function of Reynolds stress and dissipation tensor. The present model with anisotropy in length scale shows better agreement with well-accepted experimental results and an improvement over the Sarkar and Speziale (SS) quadratic model.
An Improved Model Including Length Scale Anisotropy for the Pressure Strain Correlation of Turbulence
Shillong 793003, Meghalaya, India
Kharagpur 721302, India
The University of Tokyo,
5-1-5 Kashiwanoha, Japan
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 20, 2016; final manuscript received December 4, 2016; published online February 16, 2017. Assoc. Editor: Daniel Livescu.
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Panda, J. P., Warrior, H. V., Maity, S., Mitra, A., and Sasmal, K. (February 16, 2017). "An Improved Model Including Length Scale Anisotropy for the Pressure Strain Correlation of Turbulence." ASME. J. Fluids Eng. April 2017; 139(4): 044503. https://doi.org/10.1115/1.4035467
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