摘要：The presence of a dispersed phase can significantly modulate the drag in turbulent systems. We derived a conserved quantity that characterizes the radial transport of azimuthal momentum in the fluid-fluid two-phase Taylor-Couette turbulence. This quantity consists of contributions from advection, diffusion and two-phase interface, which are closely related to density, viscosity and interfacial tension, respectively. We found from interface-resolved direct numerical simulations that the presence of the two-phase interface consistently produces a positive contribution to the momentum transport and leads to drag enhancement, while decreasing the density and viscosity ratios of the dispersed phase to the continuous phase reduces the contribution of local advection and diffusion terms to the momentum transport, respectively, resulting in drag reduction. Therefore, we concluded that the decreased density ratio and the decreased viscosity ratio work together to compete with the presence of a two-phase interface for achieving drag modulation in fluid-fluid two-phase turbulence.

关键字：drag reduction; turbulence simulation; multiphase flow

ISSN号：0022-1120

卷、期、页：卷 984

发表日期：2024-04-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：JOURNAL OF FLUID MECHANICS

参与作者：Su, Jinghong,Yi, Lei,Zhao, Bidan,Wang, Cheng,Xu, Fan,Sun, Chao

第一作者：王军武

论文类型：期刊论文

论文概要：Su, Jinghong,Yi, Lei,Zhao, Bidan,Wang, Cheng,Xu, Fan,王军武,Sun, Chao，Numerical study on the mechanism of drag modulation by dispersed drops in two-phase Taylor-Couette turbulence，JOURNAL OF FLUID MECHANICS，2024，卷 984

论文题目：Numerical study on the mechanism of drag modulation by dispersed drops in two-phase Taylor-Couette turbulence