Parameterization of turbulence modulation by finite-size solid particles in forced homogeneous isotropic turbulence

Peng，Cheng1; Sun，Qichao1; Wang，Lian Ping2,3

2023-05-12

10.1017/jfm.2023.317

Journal of Fluid Mechanics   Impact Factor & Quartile

0022-1120

1469-7645

Turbulence modulation by finite-size particles in homogeneous isotropic turbulence (HIT) has been investigated numerically and experimentally in many studies, but its controlling parameters are not fully clear. In this work, four non-dimensional parameters governing the turbulent modulation by non-settling particles, i.e. of the background HIT, the particle-To-fluid density ratio, the relative particle size and the particle volume fraction, are identified through dimensional analysis. Then, a parameterization study is conducted based on results from fully resolved direct numerical simulations to investigate the influence of the above non-dimensional parameters on the modulation of turbulent kinetic energy (TKE) and viscous dissipation rate. Empirical models that quantitatively predict the modulation of TKE and dissipation rate are then developed by fitting in the simulation results. These models are used to examine the turbulence modulation results reported in the literature. The model predictions and the data points of TKE modulation show reasonable agreement, but the model predicting the modulation of dissipation rate needs further deliberation as the credibility of the available data points is currently difficult to assess. The generality and the physics behind these empirical models also require further investigation.

multiphase and particle-laden flows

SCI

English

Others

WOS:000986822800001

ENGINEERING

2-s2.0-85160594092

Scopus

1.Key Laboratory of High Efficiency and Clean Mechanical Manufacture,Ministry of Education,School of Mechanical Engineering,Shandong University,Jinan,250061,China
2.Guangdong Provincial Key Laboratory of Turbulence Research and Applications,Ctr. for Complex Flows and Soft Matter Res. and Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Guangdong-Hong Kong-Macao Jt. Lab. for Data-Driven Fluid Mechanics and Engineering Applications,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Peng，Cheng,Sun，Qichao,Wang，Lian Ping. Parameterization of turbulence modulation by finite-size solid particles in forced homogeneous isotropic turbulence[J]. Journal of Fluid Mechanics,2023,963.

Peng，Cheng,Sun，Qichao,&Wang，Lian Ping.(2023).Parameterization of turbulence modulation by finite-size solid particles in forced homogeneous isotropic turbulence.Journal of Fluid Mechanics,963.

Peng，Cheng,et al."Parameterization of turbulence modulation by finite-size solid particles in forced homogeneous isotropic turbulence".Journal of Fluid Mechanics 963(2023).