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Mixing & Separating

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Next-generation Filtration SystemsNext-generation Filtration Systems

Fleetgaurd (Cummins) Inc., Nashville, TN
With air pollution on the rise and the EPA heading it off with strict regulations, auto manufacturers look to multiphysics modeling to take a serious bite out...

Clearing the Air: Life Support for Space ExplorationClearing the Air: Life Support for Space Exploration

NASA Marshall Space Flight Center
At the Life Support Systems Development Team, our task is to develop robust, life support systems for long duration space travel, such as lunar exploration...

COMSOL Reveals How to Avoid Very Expensive Modifications to Wastewater ClarifierCOMSOL Reveals How to Avoid Very Expensive Modifications to Wastewater Clarifier

Witteveen+Bos, Deventer, The Netherlands
A group of consulting engineers used COMSOL Multiphysics® and the Mixture Model application mode at a wastewater treatment plant to determine that simply...

Example Models

Laminar Static MixerLaminar Static Mixer

In static mixers, also called motionless or in-line mixers, the fluid is pumped through a pipe containing stationary blades. This mixing technique is particularly well suited for laminar flow mixing since it gives small pressure losses in...

Turbulent Residence Time in a Baffled ReactorTurbulent Residence Time in a Baffled Reactor

Large-scale reactors are usually made from stationary parts, often involving baffles. They make use of the baffled- imposed turbulence to provide mixing within the reactor. Yet, such reactors need to be optimized as too much baffling can...

A 3D Model of a Diesel Particulate FilterA 3D Model of a Diesel Particulate Filter

Several factors influence a diesel particulate filter’s (DPF) efficiency and durability. Important issues include the removal of soot particles from the filter membranes and the influence of thermal stress on the ceramic structure,...

Flow in a Bubble Column ReactorFlow in a Bubble Column Reactor

This example illustrates multiphase flow modeling in a bubble column reactor. The reactor is filled with water and gas bubbles are injected from the bottom. Due to buoyancy, the bubbles rise, inducing a circulating motion of the liquid....

Removing Contaminants in a Secondary Sedimentation ClarifierRemoving Contaminants in a Secondary Sedimentation Clarifier

Wastewater treatment is a several-step process for removing contaminants. Firstly, large, solid particles are removed through sedimentation, flotation, and filtration. And then in a second step, biological treatment causes the smaller...

Polymerization in a Multijet Tubular ReactorPolymerization in a Multijet Tubular Reactor

This example considers condensation polymerization in a tubular reactor, where mixing in the reactor is achieved by impinging turbulent jets of reactants onto each other. Turbulent flows involving rapid reaction kinetics are quite...