The Transport of Concentrated Species in Porous Media Interface
This interface (), found under the Chemical Species Transport branch (), is used to calculate the chemical composition in a fluid mixture transported through the interstices of a porous media. The interface is the same as the Transport of Concentrated Species interface but it has a Porous Medium node added by default. All other features for porous media transport is always available.
This interface is dedicated to analyzing mass transport in porous media where the chemical species may be subjected to convection, diffusion, and migration in an electric field. The interface also includes reaction rate expressions and source terms for modeling chemical reactions in porous media. It is also possible to include regions with free flow.
The main feature of the interface is the Porous Medium node which adds the governing equations for the mass fractions of all present species. It has two subnodes, Fluid and Porous Matrix, which in turn are used to define the physical properties corresponding to each phase, and to prescribe the transport properties. The latter are typically the flow field, and when applicable, the electric field. The Porous Medium node supports the use of a Porous Material for defining phase-specific properties, and for sharing them among different physics interfaces.
When this physics interface is added, the following default nodes are also added to the Model BuilderPorous Medium, No Flux (the default boundary condition), and Initial Values. Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions, reaction rate expressions, and species sources. You can also right-click Transport of Concentrated Species in Porous Media to select physics features from the context menu.
Settings
The rest of the settings are the same as The Transport of Concentrated Species Interface.