Showing result: 1 - 10 of 44
MEMS
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Piezo-Acoustic Transducer
People that use piezoelectric transducers are interested in phased-array microphone, ultrasound equipment, ink-jet drop actuators, drug discovery, Sonar transducers, bio-imaging and acousto-bio-theraputics. Basically anyone who is trying to create sound in air or liquids turns to a version of this p...
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FSI in a Peristaltic Pump
In a peristaltic pump, rotating rollers squeeze a flexible tube. As the rollers move along the tube, the fluid in the tube follows the motion. The main advantage of the peristaltic pump is that no seals, valves or other internal parts ever touch the fluid. Due to their cleanliness, peristaltic pumps...
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Inkjet
This example demonstrates how to model the fluid flow from an inkjet, for instance, within an inkjet printer. An ink droplet is ejected through a nozzle and travels through air until it hits the target.
A conservative level set method is used to track the interface between air and ink. The fluid...
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3D Fluid-Structure Interaction Simulation of an Obstacle in a Fluid Channel
In this model, fluid is flowing through a channel containing a flexible obstacle. Due to the viscous and pressure forces asserted by the fluid, the obstacle bends.
With the obstacle undergoing a large deformation, the fluid flow domain also changes considerably. COMSOL Multiphysics takes these c...
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Hydrocarbon Dehalogenation in a Tortuous Microreactor
Removing halogen groups from hydrocarbons is an important reaction step in several chemical processes. One application is water purification. Other examples involve organic synthesis, where the removal of halogen groups serves as a starting point for carbon-carbon coupling reactions. Typically, the...
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Cantilever Beam
The elastic cantilever beam is one of the elementary structures used in MEMS designs.
This model shows the bending of a cantilever beam under an applied electrostatic load. This is computed from the electric field that is solved in the deforming geometry/mesh domain using the Arbitrary Lagrangian...
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Microresistor Beam
The example illustrates the ability to couple thermal, electrical, and structural analysis in the one model. This particular application displaces part of a beam by passing a current through it; the current generates heat, and the temperature increase leads to displacement through thermal expansion....
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A Tunable MEMS Capacitor
In an electrostatically tunable parallel plate capacitor, the distance between the two plates can be modified, as the applied voltage changes. The distance between the plates are tuned via a spring, to which one of the plates is attached. For a given voltage difference between the plates, the distan...
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Microchannel H-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 math...
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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 ana...
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