Galleria dei Modelli
AC Electrokinetically Enhanced Surface Reactions
This model studies the use of AC electrokinetic forces to enhance the rate of transport of electrolytic reactants to a reaction surface on the wall of a microchannel. If transport was to be governed by flow alone, then the flow velocity perpendicular to the surface would be so small that the analyte would be transported mainly by diffusion. The reaction rate at the surface is large enough ...
Space-Dependent HI Reactor
This model deals with a reacting system comprising of an equimolar mixture of hydrogen and iodine gas which is allowed to react and form HI. Composition and temperature are allowed to vary both in space and time. This means that you have to define material balances, energy balances, and transport properties in the Reaction Engineering interface. These balances and properties are exported to ...
Argon Boltzmann Analysis
The electron energy distribution function (EEDF) plays an important role in the overall behavior of discharges. Analytic forms of the EEDF exist such as Maxwellian or Druyvesteyn, but in some cases they fail to fit the discharge physics. This tutorial model investigates the effects of various parameters on the electron energy distribution function and rate coefficients for an argon discharge. ...
Pacemaker Electrode, Modeled with LiveLink for Pro/ENGINEER
This model, dealing with the current and potential distribution around one pair of electrodes, demonstrates how to synchronize and modify geometry in Pro/ENGINEER by using the LiveLink interface.
Heat-Sink Investigations using the Component Library
A common method for investigating a process or system is to first study the individual components in detail. You would then start by setting up detailed models for the various components and then merge them to describe the system as a whole. With COMSOL Multiphysics you can easily merge individual models to investigate how they interact as components in a system. This exercise illustrates ...
Iron Sphere in a 20 kHz Magnetic Field
An iron sphere is exposed to a spatially uniform, sinusoidally time-varying, background magnetic field. The frequency of the field is such that there skin depth is smaller than the sphere radius. The induced currents in the sphere and the perturbation to the background field are computed. Proper meshing of domains with significant skin effect is addressed.
Michelson Interferometer
This model couples the Heat Transfer in Solids, Solid Mechanics and Geometrical Optics interfaces to compute the effect of thermal expansion of optical components on the interference pattern displayed by a Michelson interferometer.
Distributed SPICE Model of Bipolar Transistor
Integrated semiconductor devices are used in almost all electrical equipment, and the bipolar junction transistor (BJT) is still a very important device although the MOS technology has taken over a large part of the market. Especially in technologies with new types of semiconductors the bipolar transistor can be the best choice for optimum performance. The BJT consists of three semiconductor ...
Numerical modeling of glacier flow
Glacier ice is generally treated as an incompressible, heat-conducting non-Newtonian fluid. The viscosity of ice depends on temperature and on the state of deformation. In the case of Storglaciären, however, the influence of temperature-dependent viscosity on the general flow field of the glacier is small. With COMSOL Multiphysics, it is relatively easy to verify that neglecting this ...
Inclined Screen
This model simulates the flow through a uniform inclined screen using the Screen feature in Single-Phase Flow physics and compares the results with an analytic solution.
