Model Gallery

The Model Gallery features COMSOL Multiphysics model files from a wide variety of application areas including the electrical, mechanical, fluid, and chemical disciplines. You can download ready-to-use models and step-by-step instructions for building the model, and use these as a starting point for your own modeling work. Use the Quick Search to find models relevant to your area of expertise, and login or create a COMSOL Access account that is associated with a valid COMSOL license to download the model files.

Dissociation in a Tubular Reactor

Tubular reactors are often used in continuous large-scale production, for example in the petroleum industry. One key design and optimization parameter is the conversion, or the amount of reactant that reacts to form the desired product. In order to achieve high conversion, process engineers optimize the reactor design: its length, width and heating system. An accurate reactor model is a very ...

Heat Transfer and Steam Reforming in a Reactor

In fuel cell power generators, a steam reformer unit typically produces the hydrogen needed for the cell stack. This example illustrates the modeling of a steam reformer. The reformation chemistry occurs in a porous catalytic bed where energy is supplied through heating tubes to drive the endothermal reaction system. The reactor is enclosed in an insulating jacket. The tightly coupled ...

Startup of a CSTR

The hydrolysis of propylene oxide into propylene glycol is an important chemical process with 400,000 metric tons produced worldwide each year. Propylene glycol finds wide application as a moisturizer in foods, pharmaceuticals, and cosmetics. In this example, the startup phase of a continuous stirred tank reactor (CSTR) used to produce propylene glycol is investigated. The non-isothermal ...

Chemical Vapor Deposition of GaAs - new

Chemical vapor deposition (CVD) allows a thin film to be grown on a substrate through molecules and molecular fragments adsorbing and reacting on a surface. This example illustrates the modeling of such a CVD reactor where triethyl-gallium first decomposes, and the reaction products along with arsine (AsH3) adsorb and react on a substrate to form GaAs layers. The CVD system is modeled using ...

Thermal Decomposition

In this tutorial model, couple heat and mass transport equations to laminar flow in order to model exothermic reactions in parallel plate reactor. It exemplifies how COMSOL Multiphysics allows you to systematically set up and solve increasingly sophisticated models using predefined physics interfaces.

Separation Through Dialysis - new

Dialysis is frequently used membrane separation process. An important application is hemodialysis, where membranes are used as artificial kidneys for people suffering from renal failure. Other applications include the recovery of caustic colloidal hemicellulose during viscose manufacturing, and the removal of alcohol from beer. In the dialysis process, specific components are preferentially ...

Electroosmotic Flow in Porous Media

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 driven flow. The equations that are solved are the continuity equations for flow velocity and current density together with a mass balance using the ...

Syngas Combustion in a Round-Jet Burner

The model simulates non-premixed turbulent combustion of syngas (synthesis gas) in a simple round-jet burner. Syngas is a gas mixture, primarily composed of hydrogen, carbon monoxide and carbon dioxide. The name syngas relates to its use in creating synthetic natural gas. In the model, syngas is fed from a pipe into an open region with a slow co-flow of air. Upon exiting the pipe, the syngas ...

Hydrodealkylation in a Membrane Reactor

This model demonstrates how you can access and include external thermodynamic and physical property calculations in your simulation, using the Thermodynamics feature. The model shows how you can easily modify the predefined Plug-flow reactor type in the Reaction Engineering interface to set up a membrane reactor model. At high temperatures and pressures, and in the presence of hydrogen, ...

Homogeneous Charge Compression Ignition of Methane

Homogeneous Charge Compression Ignition (HCCI) engines are being considered as an alternative to traditional spark- and compression-ignition engines. As the name implies, a homogeneous fuel/oxidant mixture is auto-ignited by compression with simultaneous combustion occurring throughout the cylinder volume. Combustion temperatures under lean burn operation are relatively low, resulting in low ...

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