Showing result: 1 - 10 of 374
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Automotive Muffler
This is a model of the pressure wave propagation in a muffler for a combustion engine. The approach is general for analysis of damping of propagation of harmonic pressure waves.
The model shows how 3D acoustics can be modelled in fairly complex geometries. It also shows COMSOL Multiphysics' coup...
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Transport and Adsorption
This model shows a simple example of the modeling of surface reactions coupled to transport of species to the reacting surface. In most cases, the reaction rate expression can be defined as a function of the concentration of the reacting species and products. However, in adsorption reactions, the su...
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An Electrokinetic Valve in a Microchannel System
This model presents an example of pressure driven flow and electrophoresis in a microchannel system.
The modeled device is often used as an electrokinetic sample injector in biochips with well-defined sample volumes of dissociated acids and salts. The model presents a study of a pinched injection...
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Electroosmotic Flow in Porous Media
This example treats the modeling of electroosmotic flow in porous media. The system consists of a compartment of sintered porous material and two electrodes that generate an electric field. The cell combines pressure and electroosmotic driven flow.
The equations that are solved are the continuit...
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Fuel Cell Bipolar Plate
This study presents a model that couples the thermal and structural analysis in a fuel cell bipolar plate. The fuel cell stack consists of unit cell of anode, membrane, and cathode connected in series through bipolar plates.
The fuel cell operates at temperatures just below 100 °C, which means...
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Helmholtz Coil
A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils. T...
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H-Micro Cell
This example was originally formulated by Albert Witarsa under Professor Bruce Finlayson’s supervision at the University of Washington in Seattle. It was part of a graduate course in which the assignment consisted of evaluating the potential of patents in the field of microfluidics through mathema...
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Large Deformation and Linear Buckling Analysis of a Beam
This example studies the deflection of a cantilever beam undergoing very large deflections.
The model is called “Straight cantilever GNL Benchmark” and is described in detail in section 5.2 of NAFEMS "Background to Finite Element Analysis of Geometric Non-linearity Benchmarks".
In additi...
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Non-Isothermal Flow Around a Cooling Device
This model shows the application of COMSOL Multiphysics in the modeling of non-isothermal laminar flow of fluids (in this case a gas). The model assumes that the expansion work done by the gas is negligible, that the variations in temperature are obtained through external heating, and that the fluid...
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A Piezoelectric Shear Actuated Beam
This is example presents a static analysis of a piezoelectric actuator using the piezoelectric application mode from the Structural Mechanics Module (or the MEMS module).
A sandwich beam consisting of three layers is modeled.
The shear deformation of the piezoceramic core layer and the flexible...
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