The Nonisothermal Reacting Laminar Flow () multiphysics interface is used to simulate laminar flow and heat transfer coupled to species transport in a gas or liquid. This interface requires a license for either the Chemical Reaction Engineering Module, the Battery Design Module, or the Fuel Cell & Electrolyzer Module.

It combines the Chemistry, Transport of Concentrated Species, Laminar Flow, and Heat Transfer in Fluids interfaces. The Reacting Flow multiphysics coupling, which is added automatically, couples fluid flow, heat transfer and mass transfer. The species transport supports both a mixture, where the concentrations are of comparable order of magnitude, and low-concentration solutes in a solvent.

The Chemistry interface defines thermodynamic properties and transport properties of the fluid. Provided that properties of each species have been defined, composition dependent mixture properties such as the heat capacity, the density, and the heat conduction are defined. The Chemistry interface also defines reaction rates for species involved in the chemical reactions added to the system.

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. A Transport Properties feature is active by default on the entire interface selection

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.

The Heat Transfer interface solves for conservation of energy. A Fluid feature is active by default on the entire interface selection.