Absorption of microdrops: effect of multi-layer porous media structure parameters
This paper presents the numerical investigation of the absorption of two microdrops deposited sequentially on the surface of single- and double-layer porous media at a different location of the centers of droplets deposition. A numerical solution of the Euler equations taking into account surface tension forces and the unsteady filtration equation was used to model the uid ow from a droplet into a porous media. The layers of porous media were characterized by effective permeability coefficients dependent on porosity and pore size. The change of the droplet shape during absorption, the coordinates of absorption front propagation in a porous media and the field of velocities and pressure are the output data of a problem. The effect of the structural parameters of the multilayer porous media and the relative location of deposited droplets on the rate of absorption and distribution of absorbed uid is analyzed using the numerical experiment. It is shown that the presence of the second layer can have a significant effect on the duration and result of droplet absorption. The relative size of pore in layers is found to be the main parameter that governs the effect of the second layer.
microdrops porous media absorption
Y.D.Varlamov Y.P.Meshcheryakov M.R.Predtechensky
Institute of Thermophysics, Novosibirsk 630090, Russia Design and Technology Department of Institute of Hydrodynamics, Novosibirsk 630090, Russia
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）