Suscripción a Biblioteca: Guest

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

INFLUENCE OF HYDRAULIC DIAMETER ON FLOW CONDENSATION IN SILICON MICROCHANNELS

Get access (open in a dialog) DOI: 10.1615/IHTC13.p25.10
9 pages

Sinopsis

Condensation visualization experiments in <100> silicon triangular microchannels having hydraulic diameters of 250μm and 100μm were conducted to determine the influence of the hydraulic diameter and develop an accurate flow regime map. The results indicated that the behavior is periodic and that the intermittent frequency increases with decreases in the hydraulic diameter. The flow regime map is strongly influenced by the hydraulic diameter of the channel and at high cooling heat flux, for the 250μm channel, the flow map along the streamline was droplet-annular-injection-slug-bubble, while for the 100μm channel, the flow map along the streamline was annular-injection-slug. At low cooling levels, the 250μm channel exhibited a flow regime map that was droplet-annular, and the 100μm channel exhibited a flow regime map that was droplet-annular- fluctuant annular.