Suscripción a Biblioteca: Guest
International Symposium on Multiphase Flow and Transport Phenomena
November, 5-10, 2000, Antalya, Turkey

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhen


ISBN Print: 1-56700-162-9

CRITERIA FOR MINIMUM PARTICLE DEPOSITION ONTO A CYLINDER IN CROSS-FLOW

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SINOPSIS

A two-dimensional computational scheme for simulating particle dispersion and deposition onto the front side of a cylinder in cross-flow was developed. RNG k-ε model was used to simulate the mean turbulent flow fields. Laminar boundary layer theory has been applied near the wall.

Particle equation of motion, in Lagrangian form, included Stokes drag, Brownian, Saffman lift, and electrophoretic forces. Brownian motion is modelled as a random walk while the instantaneous turbulent fluctuation was modelled as a Gaussian random field.

Simulations with constant particle size for various fluid velocities agreed well with experimental results, from the literature, for a circular plate in cross-flow. With a single particle size one could obtain all the three deposition regimes by just varying the fluid velocity. This means for each particle size there is minimum capture efficiency, which is a function of the bulk flow's Reynolds number. Diffusion and change in residence time of the particle might explain this.

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