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KOLMOGOROV CONSTANT FOR PARTICLE-LADEN TURBULENT CHANNEL FLOW
Journal
12th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2022
Date Issued
2022-01-01
Author(s)
Rohilla, Naveen
Goswami, Partha S.
Abstract
The Kolmogorov constant is a prefactor used to correlate the spectral distribution of turbulent kinetic energy with the turbulent dissipation rate. The Kolmogorov constant has been used in stochastic turbulence models and turbulence models based on large-scale turbulent structures, like the Smagorinsky model and other eddy viscosity-based models used in large-eddy simulations (LES). Many research works have been performed to estimate the Kolmogorov constant for a wide range of turbulent flows like homogeneous isotropic turbulence, turbulent boundary layers, etc. In earlier work, Sreenivasan (1995) has consolidated and analyzed a large number of experimental data and concluded that at high Reynolds numbers, the prefactor is a universal constant. In the present work, we have estimated the Kolmogorov constant for particle-laden turbulent channel flow using second-order velocity structure-function based analysis. Our study reveals that, with an increase in particle volume fraction Kolmogorov constant decreases. The present analysis on the variation of Kolmogorov constant with particle volume loading will be helpful to model the two-phase turbulent flows.