Numerical simulation of wave interaction with porous structure using the coupled Volume-Of-Fluid (VOF) and Darcy-Brinkman-Forchheimer model

• Published in: Engineering analysis with boundary elements Vol. 166; p. 105866
• Main Authors: Garoosi, Faroogh, Kantzas, Apostolos, Irani, Mazda
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2024
• Subjects: Bubble rising; Darcy-Brinkman-Forchheimer model; Droplet impact, Dam-break flow; Porous medium; VOF model; Droplet impact, Dam-break flow; Darcy-Brinkman-Forchheimer model; VOF model; Bubble rising; Porous medium
• ISSN: 0955-7997; 1873-197X
• DOI: 10.1016/j.enganabound.2024.105866

•The non-linear Darcy-Brinkman-Forchheimer model is applied to simulate single-phase convective heat transfer in porous media.•For simulating dam break flow through a porous structure, the combined VOF and Darcy-Brinkman-Forchheimer model is used.•The influence of the porous medium's location on the hydrodynamic properties of dam break flow is analyzed.•The impact of the porous structure on the hydrodynamic characteristics of oil-water dam break flow is explored.•The findings indicate that the porous structure significantly reduces wave energy. In the present study, the hydrodynamic characteristics of multi-fluid flow through porous structure are numerically analyzed using the coupled VOF and non-linear Darcy-Brinkman-Forchheimer model. The main objective is to create state-of-the-art benchmark solutions and a modern dataset for validating Computational Fluid Dynamics (CFD). The governing equations, incorporating mass, Navier-Stokes, and volume fraction equations, undergo discretization utilizing a staggered grid system where the pressure-velocity coupling is solved using an improved version of the PISO algorithm. Furthermore, the moving interfaces in multi-fluid flow scenarios are captured using the enhanced Volume-Of-Fluid model (VOF). In order to deal with the porous media, a FORTRAN code is developed based on the non-linear Darcy-Brinkman-Forchheimer model, initially validated against challenging benchmark cases. These cases include mixed convection heat transfer in a square porous cavity, the rise of a single bubble in a rectangular container, the flow of a dam break over dry and wet beds with and without porous structures, and the impact of a droplet on a pool surface. Through comparative analysis with previously published data, the numerical model's accuracy and robustness in depicting complex single- and multi-fluid flows through porous media are confirmed. Following successful validation, the numerical model is applied to investigate the effects of the location of the porous media on the hydrodynamic characteristics of the dam break flow. In the last stage, the propagation characteristics of oil-water dam-break flow with stationary obstacle through a porous structure is investigated and discussed in details. The results show that the presence and location of porous media significantly affect the hydro-morphological changes in the dam failure phenomenon.