Galeria de Modelos

A Galeria de Modelos possui arquivos do COMSOL Multiphysics de várias áreas de aplicação incluindo elétrica, mecânica, escoamento e química. Você pode baixar modelos prontos e também tutoriais passo-a-passo para montar seu modelo, e usá-lo como ponto de partida para o seu próprio modelo. Use a função de busca "Quick Search" para encontrar modelos na sua área de interesse e faça o login ou o seu cadastro no COMSOL Access, cadastrando a sua licença do COMSOL, para poder baixar os arquivos.

Polymerization in a Semibatch Reactor

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 ...

Isothermal HI Reactor

For a perfectly mixed reactor with a predefined constant temperature, the reacting system’s energy balance is not needed to describe the system behavior. The behavior is defined as the composition and the production or consumption of species over time. Furthermore, because the reactor is perfectly mixed, the Reaction Engineering interface can also set up a model even though it has no ...

Variations in Density in Porous Media Flow

This example studies the steady flow of an ideal gas in porous media, where variations in gas density are taken into account through Equation-based Modeling. Darcy’s law describes the velocity vector in the porous structure and the conservation of mass is accounted for by the ideal gas law. The studied system is a packed bed reactor of the type used for example in small scale reforming ...

Diffusion of Gas Through a Reinforced 3D Membrane

In this example, we study the diffusion of a chemical species through a membrane. The system is used to measure the permeability of gases in membranes. The permeability of the membrane is measured by introducing the species of interest in a carrier gas on one side of the membrane and the pure carrier gas on the other side of the membrane. In this model, the initial flux in the membrane is ...

Nonisothermal HI Reactor

In the case of a perfectly mixed nonisothermal system, you have to set up both the time-dependent material and energy balances. There are no spatial concentration gradients because the system is perfectly mixed, so the Reaction Engineering interface can create a model without evaluating the material-transport properties.

Ideal Stirred Tank Reactor System - new

In the chemical and biochemical industries, for instance in fermentation processes, reactors having well-mixed conditions and liquid level control are common. This example shows how to use the Reaction Engineering interface to model a 0D ideal system of tank reactors in series, with controlled feed inlet and product outlet streams. The volume change in each reactor is monitored as well.

Degradation of DNA in Plasma

Biotechnology is a rapidly growing area in the pharmaceutical sciences. One example of a clinical application is gene therapy, where it is possible to produce proteins in vivo, using the body’s own mechanisms for protein production. Major issues in gene delivery involve the transport of plasmid DNA (pDNA) to target sites and the conversion between different forms of pDNA. This model ...

Buoyancy–driven μPCR for DNA Amplification

Polymerase chain reaction (PCR) is one of the most effective methods in molecular biology, medical diagnostics, and biochemical engineering in amplifying a specific sequence of DNA. There has been a great interest in developing portable PCR-based lab-on-a-chip systems for point-of-care applications and one strategy that seems very promising is natural convection-based PCR. This model studies ...

Fine Chemical Production in a Plate Reactor

Plate reactors running under continuous conditions have emerged as candidates to replace batch reactors, primarily in fine chemicals and pharmaceuticals production. One of the advantages of the plate reactor design is that it allows for efficient temperature control of the reacting fluid. For instance, this means that the heat released from strongly exothermic reactions can be readily dissipated ...

Parameter Estimation for Nonideal Reactor Models

Real reactors can be modeled as combinations of ideal reactors. In this example two ideal CSTRs with interchange are used to model a real reactor with one highly agitated region and another region with less agitation. Two parameters, relating the volume and exchange rate of the two regions, need to be found by comparing the model results to experimental tracer data. Using the Parameter Estimation ...

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