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DOI: 10.1615/ICHMT.2008.CHT.1560
page 11

Ilker Tari
Mechanical Engineering Department, Middle East Technical University, Ankara, Turkey

Andrew Tangborn
Department of Civil, Mechanical and Environmental Engineering, George Washington University, Washington, DC 20052; NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA

Yaman Yener
Mechanical, Industrial and Manufacturing Engineering Department, Northeastern University, Boston, MA 02115


A numerical investigation of particle motions in a horizontal channel and interactions of these particles with Bénard cells resulting from the heating of the channel from the bottom is presented. A 3-D spectral-methods-based code is developed to solve the rotational form of incompressible Navier-Stokes equations with the energy equation and the small particle equation of motion in a two-way coupled manner. A new surface-force-based approach to coupling is introduced and the importance of two-way coupling is demonstrated. It has been observed that the interactions between particles and Bénard cells can lead to the transition of the cells from one periodicity length to another.

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