The Heat Transfer in Solids and Fluids () interface is automatically added when the predefined multiphysics interface Laminar Flow under the Conjugate Heat Transfer branch is added.

It is used to model heat transfer in solids and fluids by conduction and convection. A Solid model is active by default on all domains, and a Fluid model is also added but not active.

The settings are the same as for The Heat Transfer in Fluids Interface. This means that a first order discretization of the temperature is set by default.

The settings and the feature nodes are the same as for The Heat Transfer in Fluids Interface.