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...
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...
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...
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...
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...
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...
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...
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...
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...
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...