Porous Media Flow

Application ID: 170

This model exemplifies the coupling between flow of a gas in an open channel and in a porous catalyst attached to one of the channel walls. The flow is described by the Navier-Stokes equation in the free region, and using the Brinkman equations in the porous region.

The coupling of free media flow with porous media flow is very common in the field of chemical engineering. This type of problems arises in filtration and separation and in chemical reaction engineering, for example in modeling of porous catalysts in monolithic reactors.

The most common way to deal with free and porous media flow in a system is to couple Darcy’s law, which does not account for viscous effects, with the Navier-Stokes equations. However, depending on the pore size distribution of the porous media and the fluid’s properties, it is not always appropriate to neglect viscous effects. The Brinkman equations account for momentum transport through viscous effects and through pressure gradients in porous media and can be considered an extension of Darcy's Law.