Abstract
This paper presents a numerical investigation of the flow characteristics around a freely falling square shape particle in a two-dimensional channel. The FSI (fluid-solid interaction) has been realized by using the direct-forcing/fictitious domain (DF/FD) method. In order to identify the effect of fluid property on the flow characteristics and solid motion by FSI, a wide range of the fluid viscosity has been considered, which introduces various Reynolds numbers to this study. In addition, the off-centered distance of the square particle has been imposed to research the effect of the initial position. The centered particle is freely falling without rotation and transverse motion. However, the motion of the off-centered particle is significantly depended on the Reynolds number, so it is classified into the four regimes by the flow and moving characteristics of the particle. Quantitative information about the drag coefficient on the square particle is highlighted.
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This paper was recommended for publication in revised form by Associate Editor Haecheon Choi
Man-Yeong Ha received his B.S. degree from Pusan National University, Korea, in 1981, M.S. degree, in 1983, from Korea Advanced Institute of Science and Technology, Korea, and Ph.D. degree from Pennsylvania State University, USA in 1990. Dr. Ha is currently a Professor at the School of Mechanical Engineering at Pusan National University in Busan, Korea. He serves as an Editor of the Journal of Mechanical Science and Technology. His research interests are focused on thermal management, computational fluid dynamics, and micro/ nano fluidics.
Changyoung Choi received his B.S. and M.S. degrees from Pusan National University, Korea, in 2008 and 2010, respectively. In his master course, he conducted many researches under the supervision of Prof. Man-Yeong Ha. His research interests are focused on flow analysis and control in turbulent flows and thermo-fluid phenomena analysis for enhancing the efficiency of the industrial devices.
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Choi, C., Yoon, HS. & Ha, MY. Flow around a freely falling square shape particle in a channel using direct-forcing fictitious domain method. J Mech Sci Technol 24, 1441–1449 (2010). https://doi.org/10.1007/s12206-010-0422-4
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DOI: https://doi.org/10.1007/s12206-010-0422-4