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Assessment of force models on finite-sized particles at finite Reynolds numbers 被引量:1
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作者 Ruyang LI Weixi HUANG +1 位作者 LihaoZHAO ChunxiaoXU 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2020年第6期953-966,共14页
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 surfac... 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. 展开更多
关键词 finite-sized particle immersed boundary projection method(IBPM) force model Saffman lift
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