Thermophoretc Augmentation of Particle Deposition by Laser Heating in Natural Convection flow through a Parallel plate Channel with Variable Properties

摘要

Thermophbresis play an important role in making particles of the order of 1μm deposit from the hot carrier gas on a relatively cooler wall. Particles, experience driving force towards the wall with a resulting velocity. The driving force and the velocity are called thermophoretic force and thermophoretic velocity respectively. Central heating has potential to augment particle deposition on the cold channel walls. Present paper seeks solution for thermophoretic wall flux for the natural convection flow of the carrier gas containing particles through a parallel plate channel. Governing equations are solved using finite difference marching technique. Effects of property variations with temperature and axial laser heating on thermophoretic wall flux are analysed.