OpenFOAM_transportProperties 7.3 Transport/rheology models In OpenFOAM, solvers that do not include energy/heat, include a library of models for viscosity . The models typically relate viscosity to strain rate  and are specified by the user in the transportProperties dictionary. The available models are listed in the following sections. 7.3.1 Newtonian model The Newtonian model assumes  is constant. Viscosity is specified by a dimensionedScalar nu in transportProperties, e.g. … read more »