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

作     者：Ruyang LI Weixi HUANG LihaoZHAO ChunxiaoXU Ruyang LI;Weixi HUANG;Lihao ZHAO;Chunxiao XU

作者机构：Applied Mechanics Laboratory(AML)Department of Engineering MechanicsTsinghua UniversityBeijing 100084China 

出 版 物：《Applied Mathematics and Mechanics(English Edition)》 (应用数学和力学（英文版）)

年 卷 期：2020年第41卷第6期

页      面：953-966页

核心收录：

学科分类：07[理学] 0802[工学-机械工程] 070102[理学-计算数学] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China(Nos.11490551 11772172 11702158) 

主　　题：finite-sized particle immersed boundary projection method(IBPM) force model Saffman lift 

摘      要：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 *** 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 *** 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.