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Fluid-Structure InteractionFluid-Structure Interaction

This is a model exemplifying how fluid-structure interactions can be modeled using COMSOL Multiphysics. Viscous forces and the system’s pressure impose forces to the surface of a structure. The deformation in the soft structure is not...

Fluid-Structure Interaction with Two Fluid PhasesFluid-Structure Interaction with Two Fluid Phases

The following example demonstrates techniques for modeling a fluid-structure interaction containing two fluid phases in COMSOL Multiphysics. It illustrates how a heavier fluid can induce movement in an obstacle using the arbitrary...

Droplet Breakup in a T-junctionDroplet Breakup in a T-junction

Emulsions consist of small liquid droplets immersed in an immiscible liquid and widely occur in the production of food, cosmetics, fine chemicals, and pharmaceutical products. The quality of the product is typically dependent on the size...

Deformation of a Thermomechanical MicrovalveDeformation of a Thermomechanical Microvalve

Active microvalves are common components in microfluidic systems. In a thermomechanically actuated microvalve, an electric current generates movement by resistively heating the actuator structure, thereby causing mechanical stress and...

Filling of a Capillary ChannelFilling of a Capillary Channel

This example studies a narrow vertical cylinder placed on top of a reservoir filled with water. Because of wall adhesion and surface tension at the air/water interface, water rises through the channel. Surface tension and wall adhesive...

Electroosmotic MicromixerElectroosmotic Micromixer

Microlaboratories for biochemical applications often require rapid mixing of different fluid streams. At the microscale, flow is usually highly ordered laminar flow, and the lack of turbulence makes diffusion the primary mechanism for...

Electroosmotic MicropumpElectroosmotic Micropump

Micropumps, especially those based on electroosmotic flow (EOF), are essential components in microfluidic lab-on-a-chip devices, as they contain no moving parts and are relatively easy to integrate in microfluidic circuits during...

InkjetInkjet

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...

Radially Polarized Piezoelectric TransducerRadially Polarized Piezoelectric Transducer

This tutorial model shows how a user-defined coordinate system can be used to create any type of directional polarization of a piezoelectric material. Results are shown for the case of radial polarization of a piezoelectric disk. The...

Tunable Piezoelectric ActuatorTunable Piezoelectric Actuator

A piezoelectric device can actuate a cantilever beam simply by applying an AC voltage over the device. The cantilever beam itself has resonant modes that cause peaks in the vibration when the frequency of the applied voltage passes the...


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