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

Fuente: arXiv
Guardado en:
Detalles Bibliográficos
Autores principales: Su, Jinghong, Yi, Lei, Zhao, Bidan, Wang, Cheng, Xu, Fan, Wang, Junwu, Sun, Chao
Formato: Preprint
Publicado: 2023
Materias:
Acceso en línea:
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
_version_ 1866907802765623296
author Su, Jinghong
Yi, Lei
Zhao, Bidan
Wang, Cheng
Xu, Fan
Wang, Junwu
Sun, Chao
author_facet Su, Jinghong
Yi, Lei
Zhao, Bidan
Wang, Cheng
Xu, Fan
Wang, Junwu
Sun, Chao
contents 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 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 two-phase interface for achieving drag modulation in fluid-fluid two-phase turbulence.
format Preprint
id arxiv_https___arxiv_org_abs_2310_08098
institution arXiv
publishDate 2023
record_format arxiv
spellingShingle Numerical study on the mechanism of drag modulation by dispersed drops in two-phase Taylor-Couette turbulence
Su, Jinghong
Yi, Lei
Zhao, Bidan
Wang, Cheng
Xu, Fan
Wang, Junwu
Sun, Chao
Fluid Dynamics
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 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 two-phase interface for achieving drag modulation in fluid-fluid two-phase turbulence.
title Numerical study on the mechanism of drag modulation by dispersed drops in two-phase Taylor-Couette turbulence
topic Fluid Dynamics
url https://arxiv.org/abs/2310.08098