Assessment of force models on finite-sized particles at finite Reynolds numbers

Autor:	Ru-Yang Li, Wei-Xi Huang, Lihao Zhao, Chun-Xiao Xu
Rok vydání:	2020
Předmět:	Physics Inertial frame of reference Turbulence Applied Mathematics Mechanical Engineering Surface force Direct numerical simulation Reynolds number Mechanics Physics::Fluid Dynamics Lift (force) symbols.namesake Acceleration Mechanics of Materials symbols Particle
Zdroj:	Applied Mathematics and Mechanics. 41:953-966
ISSN:	1573-2754 0253-4827
DOI:	10.1007/s10483-020-2621-9
Popis:	Finite-sized inertial spherical particles are fully-resolved with the immersed boundary projection method (IBPM) in the turbulent open-channel flow by direct numerical simulation (DNS). The accuracy of the particle surface force models is investigated in comparison with the total force obtained via the fully-resolved method. The results show that the steady-state resistance only performs well in the streamwise direction, while the fluid acceleration force, the added-mass force, and the shear-induced Saffman lift can effectively compensate for the large-amplitude and high-frequency characteristics of the particle surface forces, especially for the wall-normal and spanwise components. The modified steady-state resistance with the correction effects of the acceleration and the fluid shear can better represent the overall forces imposed on the particles, and it is a preferable choice of the surface force model in the Lagrangian point-particle method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b52aa28d99b83e5d3d5ac98c5a8fbf1 https://doi.org/10.1007/s10483-020-2621-9 Zobrazit plný text záznamu Plný text ve formátu PDF