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Title: Investigating flow patterns in a channel with complex obstacles using the lattice Boltzmann method
Authors: Jiraporn Yojina
Waipot Ngamsaad
Narin Nuttavut
Darapond Triampo
Yongwimon Lenbury
Paisan Kanthang
Somchai Sriyab
Wannapong Triampo
Mahidol University
South Carolina Commission on Higher Education
Rajamangala University of Technology Phra Nakhon
Keywords: Engineering
Issue Date: 1-Oct-2010
Citation: Journal of Mechanical Science and Technology. Vol.24, No.10 (2010), 2025-2034
Abstract: In this work, mesoscopic modeling via a computational lattice Boltzmann method (LBM) is used to investigate the flow pattern phenomena and the physical properties of the flow field around one and two square obstacles inside a two-dimensional channel with a fixed blockage ratio, β=1/4, centered inside a 2D channel, for a range of Reynolds numbers (Re) from 1 to 300. The simulation results show that flow patterns can initially exhibit laminar flow at low Re and then make a transition to periodic, unsteady, and, finally, turbulent flow as the Re get higher. Streamlines and velocity profiles and a vortex shedding pattern are observed. The Strouhal numbers are calculated to characterize the shedding frequency and flow dynamics. The effect of the layouts or configurations of the obstacles are also investigated, and the possible connection between the mixing process and the appropriate design of a chemical mixing system is discussed. © 2010 The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.
ISSN: 1738494X
Appears in Collections:Scopus 2006-2010

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