Lattice Boltzmann Method Simulation of Channel Flow with Square Pillars inside by the Field Synergy Principle
Cha'o-Kuang Chen; Shing-Cheng Chang; and Szu-Yu Sun

Source CMES: Computer Modeling in Engineering & Sciences, Vol. 22, No. 3, pp. 203-216, 2007
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Keywords lattice Boltzmann method, field synergy principle, channel flow
Abstract In this study, the channel flow is discussed by the LBM simulations. In the cases of channel with obstacles inside, the square pillars play the role of causing interruption within the fluid field, and hence change the direction of fluid flow. The recirculation region is formed behind the obstacles and influences the fluid passed through not only in the velocity field but also in the temperature field. Therefore, heat transfer is enhanced in local region. \newline The field synergy principle is applied in the research to demonstrate that the increased interruption within the fluid increases the synergistic level between the velocity field and temperature gradient field. As the intersection angle between the velocity vector and the temperature gradient vector is decreased by inserting square pillars to fluid field, the thermal efficiency of the channel is improved significantly.
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