TY - JOUR
T1 - Hybrid Diffuse and Sharp Interface Immersed Boundary Methods for Particulate Flows in the Presence of Complex Boundaries
AU - Qin , Jianhua
AU - Yang , Xiaolei
AU - Li , Zhaobin
JO - Communications in Computational Physics
VL - 4
SP - 1242
EP - 1271
PY - 2022
DA - 2022/03
SN - 31
DO - http://doi.org/10.4208/cicp.OA-2021-0166
UR - https://global-sci.org/intro/article_detail/cicp/20383.html
KW - Immersed boundary method, particle-laden flow, complex geometry.
AB - <p style="text-align: justify;">A coupling framework that leverages the advantages of the diffuse and
sharp interface immersed boundary (IB) methods is presented for handling the interaction among particles and particles with the static complex geometries of the environment. In the proposed coupling approach, the curvilinear IB method is employed
to represent the static complex geometries, a variant of the direct forcing IB method
is proposed for simulating particles, and the discrete element method is employed for
particle-particle and particle-wall collisions. The proposed approach is validated using
several classical benchmark problems, which include flow around a sphere, sedimentation of a sphere, collision of two sedimenting spheres, and collision between a particle and a flat wall, with the present predictions showing an overall good agreement
with the results reported in the literature. The capability of the proposed framework is
further demonstrated by simulating the interaction between multiple particles and a
wall-mounted cylinder, and the particle-laden turbulent flow over periodic hills. The
proposed method provides an efficient way to simulate particle-laden turbulent flows
in environments with complex boundaries.</p>