I am using COMSOL 5.6 and this is with the RF module, EM Waves Freq. See the images below for what this looks like. What I would like to understand is, why quad mesh elements won't work here? Is it something about how COMSOL solves the problem or is this something more fundamental about simulating electromagnetic waves? Mesh 2 is the one I am trying to use with the quad elements. The following features are introduced: The fundamentals: static linear analysis Parametric study Including initial strain Modeling thermal expansion Adding a rigid. I also get the warning "No mesh on domain 1 in the meshing sequence with tag mesh2". The bracket models are used as an introduction to structural mechanics modeling with the Structural Mechanics Module. When attempting the quadralateral mesh elements, I get the following error: " Feature: Stationary Solver 1 (sol1/s1) - Variables property does not include all variables in xmesh." The MEMS Module inherits the solid mechanics capabilities of the Structural Mechanics Module, with options for modeling solid mechanics in 3D, 2D, and 2D axial symmetry. COMSOL Multiphysics ® version 6.0 introduces the Model Manager, the Uncertainty Quantification Module, faster solvers for heat radiation and nonlinear structural materials, new powerful tools for electromagnetics analysis of PCBs, and flow-induced noise. When generating the mesh, the simulation will not run for when I define the mesh as a free quad, but will run when I use a free tetrahedral. Major News in COMSOL Multiphysics ® Version 6.0. For the mesh of the waveguide, we are using element size of lambda/20. The existing user-defined options in the Hyperelastic Material, Plasticity, and Creep nodes, for example, provide a convenient, but more limited way of defining your own material models.I am attempting to simulate a free waveguide using a scattered field approach as a bench mark for another simulation. The purpose of the app is to compute and analyze the important parameters of the damper such as the hysteresis loop and loss and storage moduli for a prescribed material model. Particular functionality may be common to several products. The Viscoelastic Structural Damper application can perform the time-domain and frequency-domain analyses for a typical viscoelastic damper. Two new features are available in the Solid Mechanics interface to accommodate this new functionality: the External Stress-Strain Relation material model and the External Strain subnode under the Linear Elastic Material node. The combination of COMSOL ® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. The complete stress-strain relation, on the other hand, corresponds with a top-level material node, such as the Cam-Clay material model, and is used to define a material model from the ground up. It allows for the implementation of materials similar to the built-in material models available as subnodes under the Linear Elastic Material node for example, plasticity and creep. Using only an inelastic strain contribution is quite powerful in itself. The external library can either completely define the stress-strain relation, or only return an inelastic strain contribution to the available material models. This makes it possible to program your own material models and distribute such models as add-ons. By writing a wrapper function in C code, you can also use material functions written in another programming language. You can now access external material functions, written in C code, which have been compiled into a shared library. A new way to specify user-defined material models is included in COMSOL Multiphysics version 5.2.
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