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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.

Drug Release from a Biomaterial Matrix - new

In this example, drug-release from a biomaterial matrix to damaged cell tissue is modeled. Specifically, a nerve guide delivers a regenerating drug to damaged nerve ends. The model involves detailed drug release kinetics, with rate expressions handling drug dissociation/association reactions as well as matrix degradation by enzyme catalysis. The enzyme reaction is described by Michaelis-Menten ...

Thermal Decomposition - new

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.

Chemical Equilibrium in a Protein Adsorption Ion-exchanger - new

This example uses algebraic equilibrium relations to model the time-dependent adsorption of proteins to an ion-exchange medium. The fluid phase contains three components: two proteins and one salt. The adsorption/desorption kinetics are described by a set of equilibrium reactions where proteins displace ions adsorbed at the surface and vice versa. The model highlights the implementation of ...

Boat Reactor for Low Pressure Chemical Vapor Deposition - new

Chemical vapor deposition (CVD) is an important step in the process of manufacturing microchips. One of the common applications is the deposition of silicon on wafers at low pressure. Low pressure reactors are used to get a high diffusivity of the gaseous species, which results in a uniform deposition thickness, since the process becomes limited by the deposition kinetics. The goal of this ...

Ibuprofen Synthesis - new

Kinetic analysis of catalytic reactions is essential for understanding rate behavior as well as the reaction mechanism. Developing knowledge of intrinsic reaction kinetics and of rate equations is central to reaction engineering studies aimed at improving reactor design. This model illustrates the reaction kinetics of a complex chemistry occurring in a perfectly stirred tank reactor. The ...

Optimal Cooling of a Tubular Reactor - new

Maximizing product yield is a main task in chemical reaction engineering. This can be especially challenging if the desired product, once formed, can be consumed by further reactions. This example investigates such a series reaction as it occurs in a tubular reactor. You will start by setting up the tightly coupled mass and energy balance equations describing the reactor using predefined ...

Polymerization in a Semibatch Reactor - new

As reactant monomer converts into polymer chains, the density of the reacting mixture often changes notably. In this example you will look at how this effect impacts the total production of polymer in a process. The liquid phase polymerization takes place in a semibatch reactor, where two operating conditions are compared. In the first scenario, the feed of monomer to the reactor is turned off ...

Stefan Tube - new

This example shows 1D steady-state multicomponent gas diffusion. The diffusion of three gases in a Stefan tube is modeled in 1D. The steady-state mass fraction profiles are calculated. It exemplfies in a simple way manipulation of multi-species diffusion. It also shows how this can influence convective movement. The model is compared to an article with experimental results.

Oscillating Droplet

Cemented tungsten carbides are hard metals used in steel cutting tools. They are produced by heating a powder consisting typically of tungsten carbide (WC) grains and cobalt (Co) grains. When the powder is heated, the cobalt melts but the tungsten carbide remains solid. The liquid cobalt glues the tungsten carbide grains together and forces air to flow out of the material. When the medium is ...

Liquid Chromatography - new

In the simplest terms, High Performance Liquid Chromatography (HPLC) is a separation technology - a process used to separate different chemical species that are in a mixture. And while HPLC is one of many separation technologies available, it is the most prevalent because of its versatility. These systems are most commonly used in the pharmaceutical and biotech industries, in functions as ...

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