The Reacting Laminar Flow Interface
The Reacting Laminar Flow multiphysics interface is used to simulate laminar flow coupled to species transport in a gas or liquid.
It combines the Laminar Flow, and Transport of Concentrated Species interfaces. The Reacting Flow multiphysics coupling, which is added automatically, couples fluid flow and mass transport. The fluid flow can either be free flow or flow in a porous medium. The species transport supports both a mixture, where the concentrations are of comparable order of magnitude, and low-concentration solutes in a solvent.
The interface can be used for stationary and time-dependent analysis in 2D, 2D axial symmetry, and 3D.
On the constituent physics interfaces:
The equations solved by the Laminar Flow interface are the Navier-Stokes equations for conservation of momentum and the continuity equation for conservation of mass. A Fluid Properties feature is active by default on the entire interface selection. A Fluid and Matrix Properties feature can be added in order to model flow in porous media by solving the Brinkman equations.
The Transport of Concentrated Species interface solves for an arbitrary number of mass fractions. The species equations include transport by convection, diffusion and, optionally, migration in an electric field.
The Reacting Laminar Flow interface triggers pseudo time stepping for the flow equations when Use pseudo time stepping for stationary equation form in the Fluid Flow interface is set to Automatic from physics.