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Fluid Blog Posts

Defining Curvilinear Coordinates for Anisotropic Materials

March 11, 2014

A lot of materials have anisotropic properties and, in many cases, the anisotropy follows the shape of the material. The COMSOL Multiphysics® software offers different methods for defining curvilinear coordinate systems. Here, we discuss the concepts of each and when to use which method.

How to Model Thermoviscous Acoustics in COMSOL Multiphysics

February 28, 2014

When modeling acoustics phenomena, particularly of devices with small geometric dimensions, there are many complex factors to consider. The Thermoviscous Acoustics interface offers a simple and accurate way to set up and solve your acoustics model for factors such as acoustic pressure, velocity, and temperature variation. Here, we will demonstrate how to model your thermoviscous acoustics problems in COMSOL Multiphysics and provide some tips and resources for doing so.

Buoyancy-Driven μPCR for DNA Amplification

February 26, 2014

DNA is a complex molecule that contains instructions for life and often referred to as a “digital fingerprint” or code telling a cell what to do. DNA is often the only means for accurate testing and identification of biomolecules, cells, or even an entire person during forensic investigations. The need to be able to test for DNA, as quickly as possible, and even at the site where the sample is taken, is becoming more and more important.

Amphos 21: Modeling Coupled Thermo-Hydro-Mechanical-Chemical Phenomena

February 18, 2014

Today, we are pleased to introduce a new guest author, Jorge Molinero of Amphos 21, a COMSOL Certified Consultant, who blogs about their new iCP technology. Along with several other parties, we at Amphos 21 have launched iMaGe, a multiphysics and geochemistry interfacing platform. The platform’s first product, iCP, connects COMSOL and PHREEQC, enabling the modeling of coupled Thermo-Hydro-Mechanical-Chemical phenomena.

Simulating Thermal Performance in Windows

February 4, 2014

Keeping the inside of a building at a comfortable temperature requires well designed windows to keep heat out during the summer and heat in during the winter. Let’s take a look at how windows provide thermal insulation and how they carry heat (or not) between the inside of a building and the outdoors.

Improving Bioreactor Performance with COMSOL Multiphysics

January 31, 2014

We have the pleasure of introducing a new guest blogger, Mark Yeoman of Continuum Blue, who showcases what they can do for their biomedical engineering clients. In a recent webinar, I had the opportunity to highlight some of the great things we at Continuum Blue are doing in the biomedical field. In this guest post, I will delve deeper into how we use COMSOL software to help clients improve bioreactor performance and show you a bioreactor modeling example.

Modeling a Displacement Ventilation System

January 27, 2014

There are, in general, two different types of ventilation systems: mixing ventilation and displacement ventilation. Displacement ventilation is used in large spaces with tall ceilings (at least three meters high), and therefore is mainly found in office buildings, schools, and other public spaces. These higher ceilings allow for upward convective flows exhausting air contaminants, thus resulting in improved air quality. This post explores the simulation of a displacement ventilation system to determine the air temperature and velocity within a room.

Multiphysics Analysis of Advanced Materials: Ceramic Matrix Composites

January 20, 2014

Today we have the pleasure of introducing Jeff Crompton, a guest author from AltaSim Technologies, who will discuss ceramic matrix composites and how to accurately analyze the production of such an advanced material. Ceramic matrix composites (CMCs) are fast becoming popular in many industries due to their ability to withstand high temperatures, corrosion, and wear better than metal components. They are being used in space applications, burners and combustion chambers, gas turbines, brake discs, and slide bearings. The manufacture of […]


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