Preliminary experimental results of forced convection by octadecane paraffin (encapsulating phase-change material (EPCM)) particles, acrylonitrile butadiene styrene plastic particles, or by clear (of particulates) water flowing through a heated parallel-plates channel are reported. The objective is to investigate the mixing effect of the particles vis-à-vis the latent heat effect. The particle concentration is kept at 3% in volume. The results, in terms of surface-averaged channel temperature and heat transfer coefficient for different fluid speed and heat-flux, indicate the mixing effect to account from 19% to 68% of the heat transfer enhancement produced by using EPCM particles. Hence particle mixing, even at a very low particle concentration, is an effective convection mechanism.

Issue Section:
Technical Briefs
Keywords:
multiphase cooling, channel convection, phase-change material, particulate flow, bio-inspired, channel flow, cooling, forced convection, latent heat, mixing, multiphase flow, phase change materials, plastics
Topics:
Biomimetics, Convection, Cooling, Flow (Dynamics), Forced convection, Heat flux, Latent heat, Paraffin wax, Particulate matter, Phase change materials, Temperature, Water, Heat transfer coefficients, Fluids
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