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providing the shear-stress term in the momentum equation for incompressible and compressible Newtonian, non-Newtonian and visco-elastic laminar flow as well as Reynolds averaged and large-eddy simulation of turbulent flow. The general deviatoric shear-stress term provided by the MomentumTransportModels library is named divDevTau for compressible flow and divDevSigma (sigma = tau/rho) for incompressible flow, the spherical part of the shear-stress is assumed to be either included in the pressure or handled separately. The corresponding stress function sigma is also provided which in the case of Reynolds stress closure returns the effective Reynolds stress (including the laminar contribution) or for other Reynolds averaged or large-eddy turbulence closures returns the modelled Reynolds stress or sub-grid stress respectively. For visco-elastic flow the sigma function returns the effective total stress including the visco-elastic and Newtonian contributions. For thermal flow the heat-flux generated by thermal diffusion is now handled by the separate ThermophysicalTransportModels library allowing independent run-time selection of the heat-flux model. During the development of the MomentumTransportModels library significant effort has been put into rationalising the components and supporting libraries, removing redundant code, updating names to provide a more logical, consistent and extensible interface and aid further development and maintenance. All solvers and tutorials have been updated correspondingly and backward compatibility of the input dictionaries provided. Henry G. Weller CFD Direct Ltd.
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About OpenFOAM
OpenFOAM is a free, open source computational fluid dynamics (CFD) software package released by the OpenFOAM Foundation. It has a large user base across most areas of engineering and science, from both commercial and academic organisations. OpenFOAM has an extensive range of features to solve anything from complex fluid flows involving chemical reactions, turbulence and heat transfer, to solid dynamics and electromagnetics.
Copyright
OpenFOAM is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version. See the file COPYING in this directory or
http://www.gnu.org/licenses/, for a description of the GNU General Public
License terms under which you can copy the files.