09.03.2016 · The multigrid implementation in COMSOL is designed to work automatically for free meshes and if you use higher-order finite element shape functions. I have found that the best option is to use manually generated meshes because you will have full control over your solution and get it to fit in your machine.
COMSOL, but two of the most widely used are multigrid methods and domain decomposition. Fig. 4: A schematic description of the full multigrid algorithm.
Feb 08, 2013 · February 8, 2013. Solution methods are a valuable tool for ensuring the efficiency of a design as well as reducing the overall number of prototypes that are needed. In today’s blog post, we introduce you to a particular type of method known as multigrid methods and explore the ideas behind their use in COMSOL Multiphysics.
Set the initial mesh to Mesh 1 in Step 1: Stationary and set the additional meshes as multigrid level sub features to Step 1: Stationary (Multigrid level 1 and 3, for instance, should be set to Mesh 2 and 4, respectively.) If the multigrid level sub feature is not available, activate the advanced study options in the show tab as discussed earlier.
Multigrid Performance. The setup of the smoothing operations for the multigrid solvers are improved on clusters. This leads to improved performance for virtually all multigrid-dependent simulations that solve linear systems over and over again. The improvements also have effects, albeit smaller, when running on one node (not cluster).
COMSOL Multiphysics performs smoothing on all but the coarsest multigrid level. A smoother should be computationally cheap and effective at reducing the ...
Linear in the COMSOL Multiphysics Programming Reference Manual. General. Select a multigrid Solver: Geometric multigrid (the default), Algebraic multigrid, ...
Approach 2: Build all the multigrid levels manually. Build the meshes manually using user-defined meshing sequences. Each subsequent mesh should be approximately twice as coarse as the previous one. Set the initial mesh to Mesh 1 in Step 1: Stationary and set the additional meshes as multigrid level sub features to Step 1: Stationary (Multigrid ...
Multigrid method. In numerical analysis, a multigrid method ( MG method) is an algorithm for solving differential equations using a hierarchy of discretizations. They are an example of a class of techniques called multiresolution methods, very useful in problems exhibiting multiple scales of …
Geometric Multigrid Solver and Experimental Validation in Laser Surface Remelting. INTRODUCTION The purpose of this work is to verify the effect of Multigrid method on the CPU time for the resolution of the heat transfer model, based on the Finite Element Method (FEM), in order to simulate the laser surface remelting (LSR) of the Al–1.5 wt ...