Modell Galerie

Die Modell Galerie umfasst COMSOL Multiphysics Modelldateien aus einer Vielzahl von Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Sie können fertige Modelle herunterladen sowie Schritt-für-Schritt-Anleitungen, mit denen Sie die Modelle nachbauen können, und verwenden Sie die Modelle als Ausgangspunkt für Ihre eigenen Anwendungen. Nutzen Sie die Quick Search, um die für Ihren Fachbereich relevanten Modelle zu finden. Um die Dateien herunterzuladen, loggen Sie sich ein oder erzeugen Sie einen COMSOL Access Account, der mit einer gültigen COMSOL Lizenz assoziiert ist.

Droplet 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 of the droplets. Simulating these processes can help in optimizing these droplets as well as other process variables. This model studies the volume mass ...

Inkjet Nozzle: Level Set

Inkjet printers are attractive tools for printing text and images because they combine low cost and high resolution with acceptable speed. Designers can vary several parameters to modify a printer’s performance. Simulations can be useful to improve the understanding of the fluid flow and to predict the optimal design of an inkjet for a specific application. Although initially invented to ...

Red Blood Cell Separation using Magnetophoresis

Particle Tracing is used in conjunction with magnetic fields and pressure-driven microfluidic flow to calculate the separation of red blood cells from blood plasma using magnetophoresis. An array of soft iron rectangles on either side of a microfluidics channel modifies the magnetic field induced by a pair of neodymium permanent magnets. The resulting strong gradients in the magnetic field ...

Jet Instability - Moving Mesh and Level Set Models

The Marangoni effect results in a slip velocity in the tangential direction on a fluid/fluid interface due to gradients in the surface tension coefficient. When the surface tension coefficient is constant, a two-fluid system may exist in static equilibrium. This is because the surface tension force may be exactly balanced by a jump in the pressure across the interface. The pressure is ...

Electroosmotic 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 mixing. While diffusional mixing of small molecules (and therefore of rapidly diffusing species) can occur in a matter of seconds over distances of tens of ...

Electrokinetic Valve

This model presents an example of pressure driven flow and electrophoresis in a 3D micro channel system. Researchers often use a device similar to the one in this model as an electrokinetic sample injector in biochips to obtain well-defined sample volumes of dissociated acids and salts and to transport these volumes. Focusing is obtained through pressure driven flow of the sample and buffer ...

Electroosmotic 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 fabrication. One major drawback in the conventional design of electroosmotic micropumps is the use of a high driving voltage. Therefore, the development of a ...

A Drug Delivery System

This example describes the operation of a drug delivery system that supplies a variable concentration of a water soluble drug. A droplet with a fixed volume of water travels down a capillary tube at a constant velocity. Part of the capillary wall consists of a permeable membrane separating the interior of the capillary from a concentrated solution of the drug. As the drop passes by the membrane, ...

Controlled Diffusion Micromixer

This model simulates an H-shaped micro-cell designed for controlled diffusive mixing. The cell puts two different laminar streams in contact for a controlled period of time. The contact surface is well-defined and, by controlling the flow rate, it is possible to control the amount of species that are transported from one stream to the other through diffusion. This example was originally ...

Star-Shaped Microchannel Chip

This model presents a time-dependent study of a microchannel that is used to infuse and flush another piece of equipment with a fluid. The pressure at the five inlets varies sinusoidally as functions of time, and the velocity vector at the outlet is studied. The model uses an extruded prism mesh, which reduces the computational time and memory requirements.

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