The Reacting Flow in Porous Catalysts, Transport of Diluted Species interface () is used to study the impact of adsorption and heterogeneous reactions involving chemical species, as a gas or liquid is moving through the interstices of a porous medium.

It combines the Brinkman Equations interface (), and the Transport of Diluted Species in Porous Catalysts interface (). The Reacting Flow, Diluted Species multiphysics coupling, which is added automatically, couples fluid flow and mass transport. A Porous Material node, including a Fluid and a Solid subnode, is also added to the component.

The Brinkman Equations interface computes the fluid velocity and pressure fields of single-phase flow in porous media in the laminar flow regime. A Porous Medium feature is active by default on the entire interface selection.

The Transport of Diluted Species in Porous Catalysts interface solves for the concentration of an arbitrary number of bulk species, and optionally, an arbitrary number of surface species and porous media. The bulk species are assumed to be solutes, dissolved in a solvent of significantly higher concentration. In the current multiphysics interface a Porous Catalyst feature is active by default on the entire interface selection.