The Pore-level Model Analysis On The Evaporation Of The Extended Meniscus Region In A Porous Structure

The thin film interline region of an extended meniscus has a distinct influence in the micro-channel. Because it is thinnest, it is also the location where the evaporation rate is the highest. The length of the thin film has straight effect on the whole evaporation heat transfer. In this paper, it is assumed that the thin film region can be considered as the transition zone where the contact angle varies from the apparent value,θ=0 at the contact line of x=0,θ=αat the contact line of x=xi. Mathematical description of the vapor-liquid interface was established. After the temperature of the vapor-liquid interface is gained by using the integral method, we could get the thickness of the film and the velocity of the liquid and vapor respectively. The effluences of the solid temperature, contact angle, size of the capillary and haymaker constant could be gained too. We can know the interrelationship of those factors more carefully. And the possibility of dry-out was researched too.