How can I see which stabilization schemes are used by COMSOL Multiphysics in transport physics interfaces such as Single-Phase Flow and Transport of Diluted species?
Numerical solutions of transport equations can sometimes exhibit oscillations even when the exact solutions are smooth. These spurious oscillations are caused by numerical instabilities.
The general methods for all stabilization of flow equations are described in the COMSOL Multiphysics Reference Manual, section Numerical Stabilization. For some special cases, for example Single-Phase Flow, there are more details in the respective User's Guide.
The default stabilization settings are optimized to work for most scenarios. If you want to change them, at the top of the model builder click Show->Stabilization. Then select the physics node in the model tree, for example Laminar Flow. On the Settings page, the stabilization sections will appear.
Note that the exact implementation details of all the stabilization terms in the software are not directly available for inspection in the Weak Expression field of the Equation View node in the Model Builder.
COMSOL makes every reasonable effort to verify the information you view on this page. Resources and documents are provided for your information only, and COMSOL makes no explicit or implied claims to their validity. COMSOL does not assume any legal liability for the accuracy of the data disclosed. Any trademarks referenced in this document are the property of their respective owners. Consult your product manuals for complete trademark details.