Model Gallery

The Model Gallery features COMSOL Multiphysics model files from a wide variety of application areas including the electrical, mechanical, fluid, and chemical disciplines. You can download ready-to-use models and step-by-step instructions for building the model, and use these as a starting point for your own modeling work. Use the Quick Search to find models relevant to your area of expertise, and login or create a COMSOL Access account that is associated with a valid COMSOL license to download the model files.

Reactive Muffler

This is a benchmarking model to compare the abilities of COMSOL to an analytical solution. The model examines the sound-transmission properties of an idealized reactive muffler with infinitely long inlet and outlet pipes and one expansion chamber. The infinitely long inlet and outlets are simulated through a reflection-free source at the inlet pipe and a reflection-free end of the outlet pipe, ...

Tapered Membrane End Load

This example shows a 2D plane stress model of a membrane with a thickness of 0.1 m. The load is a uniformly distributed horizontal load of 10 MN/m (that is, a pressure of 100 MPa) along the right end. At the left end, the membrane is constrained from movement in the x direction. At the left end's midpoint, the membrane is kept fixed. The resulting x-direction stress is compared to a NAFEMS ...

Tapered Cantilever Gravity Load

This example shows a 2D plane stress model of a membrane with a thickness of 0.1 m. The load is a gravity load that acts in the negative y direction. The left end boundary is kept fixed. The resulting shear stress is compared to a NAFEMS benchmark value

Micromixer

The development of mixers does often not only have to account for effectiveness, but also other factors must be involved, such as cost and complexity for manufacturing. The three models study a laminar static micro mixer with two parallel sets of split-reshape-recombine mixing elements. The mixer works through lamination of the streams without any moving parts and the mixing is obtained through ...

Thin-Layer Diffusion

This tutorial model demonstrates the use of brick and prism meshes to mesh thin 3D structures. An identity boundary condition makes sure that the concentration is the same across the interface between the two geometries. Connecting two different mesh types is a good way for saving memory in geometries with large aspect ratios. In this example, the curved geometry requires greater resolution ...

A 3D Model of a Diesel Particulate Filter

Several factors influence a diesel particulate filter’s (DPF) efficiency and durability. Important issues include the removal of soot particles from the filter membranes and the influence of thermal stress on the ceramic structure, stress that arises during repeated operating cycles. Mathematical modeling provides a powerful tool for investigating such critical parameters under a wide range of ...

Stiffness Analysis of a Communication Mast´s Diagonal Mounting

Communication masts usually have a framework with a bolted triangular lattice design. The diagonals of the framework are assembled from several parts and welded together. When operating under a given wind load at a specific location, the antenna’s total rotation angle should stay below a certain limit to ensure uninterrupted communications. For the type of mast in this model, the engineers ...

Stationary Incompressible Flow over a Backstep using Argyris Elements

This model examines the physics of plane, incompressible and steady flow over a backward step in the absence of external forces. It addresses a common benchmark problem in the field of computational fluid dynamics. There is no known exact solution, but experimental data have been published, making it possible to check the accuracy of the FEM solution. The model exemplifies a divergence-free ...

Rigid Body Motion using the Level Set Method

This model demonstrates how you can use the Level Set method and application mode to track an interface in a given velocity field. It also shows how the choice of the level set parameters influence the solution.

Sensitivity Analysis of a Communication Mast Detail

The example Stiffness Analysis of a Communication Mast’s Diagonal Mounting in the COMSOL Multiphysics Model Library shows how you can modify a 3D CAD model to improve its performance. In that case, the applied changes were based solely on the analyst’s experience with similar structures. A senior design engineer can sometimes reach acceptable performance after analyzing only a handful of ...

Quick Search