TY - JOUR
T1 - Numerical Investigation of "Frog-Leap" Mechanisms of Three Particles Aligned Moving in an Inclined Channel Flow
AU - Niu , Xiao-Dong
AU - Hu , Ping
AU - Zhang , Xing-Wei
AU - Meng , Hui
AU - Yamaguchi , Hiroshi
AU - Iwamoto , Yuhiro
JO - Advances in Applied Mathematics and Mechanics
VL - 2
SP - 207
EP - 228
PY - 2018
DA - 2018/05
SN - 7
DO - http://doi.org/10.4208/aamm.2014.m563
UR - https://global-sci.org/intro/article_detail/aamm/12045.html
KW - 
AB - <p style="text-align: justify;">Intrigued by our recent experimental work (H. Yamaguchi and X. D. Niu,
J. Fluids Eng., 133 (2011), 041302), the present study numerically investigate the
flow-structure interactions (FSI) of three rigid circular particles aligned moving in
an inclined channel flow at intermediate Reynolds numbers by using a momentum-exchanged
immersed boundary-lattice Boltzmann method. A &quot;frog-leap&quot; phenomenon
observed in the experiment is successfully captured by the present simulation and flow
characteristics and underlying FSI mechanisms of it are explored by examining the effects
of the channel inclined angles and Reynolds numbers. It is found that the asymmetric
difference of the vorticity distributions on the particle surface is the main cause
of the &quot;frog-leap&quot; when particle moves in the boundary layer near the lower channel
boundary.</p>