Experimental study on evaporation-capillary pumping flow in capillary wick and working fluid system

Evaporation/boiling on Thin Capillary Wick (I): Thickness Effects

Passive microfluidic pumping using coupled capillary/evaporation effects.

Controlled pumping of fluids through microfluidic networks is a critical unit operation ubiquitous to lab-on-a-chip applications. Although there have been a number of studies involving the creation of passive flows within lab-on-a-chip devices, none has shown the ability to create temporally stable flows for periods longer than several minutes. Here a passive pumping approach is presented in wh...

Evaporation/boiling on Thin Capillary Wick (II): Effects of Volumetric Porosity and Mesh Size

experimental study of capillary effects on the dynamics of surface evaporation of water droplets

the evaporation of liquid droplets is of fundamental importance in a large number of practical situations ranging from technological applications such as ink-jet printing, spray cooling and various coating processes, to a variety of biological and geophysical contexts. in this study, the behavior of the surfaces of glass, plexiglas, aluminum and copper in the evaporation of water droplets is st...

A microscale model for thin-film evaporation in capillary wick structures

A numerical model is developed for the evaporating liquid meniscus in wick microstructures under saturated vapor conditions. Four different wick geometries representing common wicks used in heat pipes, viz., wire mesh, rectangular grooves, sintered wicks and vertical microwires, are modeled and compared for evaporative performance. The solid-liquid combination considered is copper-water. Steady...