The adaptation functionality and error estimation have also been unified such that the error estimates used by the adaptation method are now available as dependent variables to be used for postprocessing the results. See the Mesh Updates page for more details. Alternatively, the Size Expression node can be added to a meshing sequence in the Model Builder in order to vary element size throughout the modeling space using expressions. The Adapt feature refines your mesh based on either an expression for the error in your solution or by an expression for the desired mesh element size.
To achieve this, two new meshing features have been introduced: Adapt and Size Expression.
COMSOL 5.3 NEGLIGENCE INERTIA MANUAL
Furthermore, the resulting adapted meshes are now based on meshing features that make it possible to seamlessly switch from the automated solution process to manual adaptation when required. The h-adaptation algorithm for stationary, parametric, and eigenvalue problems has been revised so that you can save the intermediate solutions and meshes. The SA-AMG solver requires only one mesh level, which is far easier to obtain.Īdaptation Integrated with Meshing Sequences and Error Estimation This difference in dimensions makes it difficult to efficiently mesh the air domain together with the smaller parts and components, which would be made even more difficult if three meshes of different sizes are to be created. The SA-AMG solver only requires one mesh level, making the meshing process much easier and the solving process much more robust for large problems and "difficult" geometries.įor example, in the fluid-structure interaction model of a solar panel (in the image), the struts and beams supporting the panels are small in comparison to the air domain surrounding it. Use of the alternative geometric multigrid (GMG) solver requires three mesh levels to be considered, which can create issues when trying to mesh and solve models with varying geometries of different sizes. The smoothed aggregation algebraic multigrid (SA-AMG) method has been extended to work with the specialized smoothers for CFD in COMSOL Multiphysics ®: SCGS, Vanka, and SOR Line. Browse all of the COMSOL Multiphysics ® version 5.3 updates relating to studies and solvers below.
COMSOL Multiphysics ® version 5.3 includes a new solver for CFD simulations and a new solver for electromagnetic and corrosion boundary element method simulations.