多孔介质

Abstract(#br)The pressure drop in microfluidic minichannels filled with porous media formed by square arrays of microcylinders is investigated. We investigate the problem by combining the Brinkman equation and existing models for permeability of regular arrays of cylinders to calculate the pressure drop of the studied geometries theoretically.

Abstract(#br)The aims of this study were to build PDMS micromodels that simulated plant-based food material, and use them to investigate the drying mechanisms at pore-scale, the drying front morphologies and the drying curves during the isothermal drying process. Micromodels were built using a modified photolithographic technique. Three normal pore size distribution functions were developed to simulate the plasmodesma, intercellular space, and cell wall. Micromodels were impregnated with a pyranine aqueous solution and placed on a balance illuminated with ultraviolet light.