首页>
外文期刊>The Open Transport Phenomena Journal
>A Three-Dimensional Numerical Model for Determining the PressureDrops in Porous Media Consisting of Obstacles of Different Sizes
【24h】
A Three-Dimensional Numerical Model for Determining the PressureDrops in Porous Media Consisting of Obstacles of Different Sizes
A three-dimensional numerical model is proposed to determine the pressure drops in porous media consistingof obstacles of different sizes. A series of full three-dimensional numerical calculations were performed to reveal complexthree-dimensional velocity and pressure fields within three-dimensional porous structures consisting of spheres ofdifferent sizes. These numerical results are processed to obtain the macroscopic pressure gradients. An effective diameterconcept has been proposed to correlate the resulting macroscopic pressure gradients with the Ergun equation. The mostappropriate definition of the effective diameter has been found such that it, when substituted in the Ergun formula, givesthe most reasonable estimate on the pressure drop for the given porosity and diameter distribution.
展开▼
