The Effect of porous media specific surface area on non-Darcy flow behavior using pore scale simulation Yusron Feriadi(a)(b*), Umar Fauzi(a), M Rizqie Arbie(a), Fariduzzaman(c)
a) Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology
b) Research Center for Hydrodynamics Technology, National Research and Innovation Agency
*yusr004[at]brin.go.id
c) Directorate of Laboratory Management, Research Facilities and Science Area, National Research and Innovation Agency
Abstract
The effect of the specific surface area of the 3D image of the beadpack on the permeability value and non-Darcy flow behavior was investigated using direct flow simulation using the finite volume method. Specific surface area variations are carried out by upscaling the original image, so that it directly changes the grain size to several diameter variations including 100 um, 125 um, 150 um, 175 um, and 200 um, without changing the porosity and tortuosity values. In this study, we adopted the PIMPLE algorithm to solve the Navier-Stokes equations, which is a combination of the PISO (implicit pressure with splitting of operator) and SIMPLE (semi-implicit method for pressure-linked equations) algorithms. The simulation results show that the permeability value is inversely proportional to the square of the specific surface area. This relationship is in good agreement with the Kozeny-Carman equation. In addition, based on numerical modeling, it can be concluded that the larger the grain diameter, the faster the flow transition from Darcy to non-Darcy occurs.
Keywords: permeability- non-Darcy- pore scale simulation- spesific surface area
