Turbulence modulation by finite-size particles of different diameters and particle-fluid density ratios in homogeneous isotropic turbulence
In this paper, the influence of particle-fluid density ratio and particle diameter on the turbulence modulation by finite-size particles in forced homogeneous isotropic turbulence is investigated. Results show that the presence of finite-size particles always attenuate the turbulence, and the attenuation is larger for particles with larger density when the particle diameter is fixed. But the attenuation is smaller for particles with larger diameter if the density is fixed, and the weaker attenuation is due to the wake fluctuation when the particle Reynolds number is large enough. The turbulence kinetic energy is attenuated at the large scales and augmented at the small scales. The radial dissipation profiles show that the region affected by the particles with same diameter is identical, but the dissipation near the particle surface is larger if the density is larger due to larger slip velocity and particle Reynolds number. For particles with same density, smaller particles have smaller dissipation near the particle surface but the influence region is larger, and the combined effect leads to the result that the contribution of dissipation in the influence region of smaller particles to the total dissipation is larger. The influence region mainly depends on the particle diameter.
Natural Science Foundation of China["11732010","12072185","11988102","91852205","92052201"]
|WOS Research Area|
Mechanics ; Physics
Mechanics ; Physics, Fluids & Plasmas
|WOS Accession No|
|ESI Research Field|
Web of Science
Cited Times [WOS]:2
|Document Type||Journal Article|
|Department||Department of Mechanics and Aerospace Engineering|
1.Shanghai Institute of Applied Mathematics and Mechanics,Shanghai Key Laboratory of Mechanics in Energy Engineering and School of Mechanics and Engineering Science,Shanghai University,Shanghai,China
2.Key Laboratory of High Efficiency and Clean Mechanical Manufacture,Ministry of Education,School of Mechanical Engineering,Shandong University,Jinan,China
3.National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,Jinan,China
4.Guangdong Provincial Key Laboratory of Turbulence Research and Applications,Center for Complex Flows and Soft Matter Research and Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,China
5.Guangdong-Hong Kong-Macao Joint Laboratory for Data-Driven Fluid Mechanics and Engineering Applications,Southern University of Science and Technology,Shenzhen,China
Shen，Jie,Peng，Cheng,Wu，Jianzhao,et al. Turbulence modulation by finite-size particles of different diameters and particle-fluid density ratios in homogeneous isotropic turbulence[J]. JOURNAL OF TURBULENCE,2022.
Shen，Jie,Peng，Cheng,Wu，Jianzhao,Chong，Kai Leong,Lu，Zhiming,&Wang，Lian Ping.(2022).Turbulence modulation by finite-size particles of different diameters and particle-fluid density ratios in homogeneous isotropic turbulence.JOURNAL OF TURBULENCE.
Shen，Jie,et al."Turbulence modulation by finite-size particles of different diameters and particle-fluid density ratios in homogeneous isotropic turbulence".JOURNAL OF TURBULENCE (2022).
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