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Fluid Flow

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COMSOL Reveals Unknown Effects in Process InstrumentationCOMSOL Reveals Unknown Effects in Process Instrumentation

MKS Instruments, Wilmington, MA
Modeling has become invaluable in MKS Instruments' development of first-class mass-flow controllers for the process industry. They have gained a detailed...

MEMS Biosensor Brings about Disposable DNA DetectorsMEMS Biosensor Brings about Disposable DNA Detectors

Dept. Mechanical Engineering, University of California, Santa Barbara, CA
Wouldn't it be a great service for the diagnosing and treating genetic of diseases if physicians had a disposable instrument for detecting DNA that worked as...

Modeling Optimizes Environmentally Friendly Flameless FurnaceModeling Optimizes Environmentally Friendly Flameless Furnace

University of Catania, Italy
In flameless combustion, air and fuel entering the chamber are mixed with high-temperature recirculated exhaust gases that provide the activation energy...

Simulation Addresses Band-Broadening in HPLC SystemsSimulation Addresses Band-Broadening in HPLC Systems

Waters Corp., Milford, MA, USA
At Waters Corp., people who work in R&D have seen a lot of benefits from doing simulations — from understanding fundamentally what happens to...

Example Models

Micro MixerMicro Mixer

The development of mixers does often not only have to account for effectiveness, but also other factors must be involved, such as cost and complexity for manufacturing. This example studies a laminar static micro mixer with two...

Perforated WellPerforated Well

Analysis of fluid flow into wells often begins with the assumption that the intake fluid is uniform along the entire length of wellbore. This assumption runs into trouble when applied to the modeling of perforated wells. When these wells...

Buoyant Darcy Flow: The Elder ProblemBuoyant Darcy Flow: The Elder Problem

This model of buoyancy flow driven by salt concentrations is a benchmark problem originally posed for heat flow by Elder (1967) and recast for solute transport by Voss and Souza (1987). It has been used to benchmark numerous density flow...

Failure of a Multilateral WellFailure of a Multilateral Well

An increasingly common technique to maximize oil production from deep wellbores is to emplace "open" multilateral wells, with multiple legs that branch off of a single conduit. The down side of leaving the well open is a high risk of...

Discrete FractureDiscrete Fracture

This example models free flow through a fracture in a block of porous media, where flow in the fracture is much faster than in the matrix block. The approach uses internal borders for modeling the free flow in 2D. The porous media flow is...

Shell-and-Tube Heat ExchangerShell-and-Tube Heat Exchanger

In this model, you will study a part of a shell-and-tube heat exchanger, where hot water enters from above. The cooling medium flows through the tubes that, in this model, impose a constant temperature at the walls. Furthermore, the tubes...

Bending PipeBending Pipe

This model studies the fluid flow through a bending pipe in 3D for the Reynolds number 300 000. Because of the high Reynolds number, the k-epsilon turbulence model is used. Calculations with and without corner smoothing are...

InkjetInkjet

This example demonstrates how to model the fluid flow from an inkjet, for instance, within an inkjet printer. An ink droplet is ejected through a nozzle and travels through air until it hits the target. A conservative level set method...

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....

Convective Cooling of a Potcore InductorConvective Cooling of a Potcore Inductor

The inductor is a common component in a variety of electrical devices. Its applications include power transformation and measurements, and it can also be used together with capacitors to create oscillators. In small devices with many...

Hydrocarbon Dehalogenation in a Tortuous MicroreactorHydrocarbon Dehalogenation in a Tortuous Microreactor

Removing halogen groups from hydrocarbons is an important reaction step in several chemical processes. One application is water purification. Other examples involve organic synthesis, where the removal of halogen groups serves as a...

Fully-coupled Physics with Joule Heating, CFD and Chemical ReactionsFully-coupled Physics with Joule Heating, CFD and Chemical Reactions

In this example, a fluid carrying several chemical components is pumped into a detector compartment. A wire in the center of the detector is heated through Joule heating, which is supposed to detect changes in density through convective...