## Building COMSOL Multiphysics® Models with Excel® and Visual Basic®

##### Kristoffer Raneflod March 15, 2017

Have you ever thought about customizing or building a model in the COMSOL Multiphysics® software that is based on data from Excel® spreadsheet software? Excel spreadsheets are used to present, collaborate, and store data within many science and engineering applications. Using Microsoft® Visual Basic® for Applications and LiveLink™ for Excel®, we can build and control model settings and parameters within the Excel® spreadsheet software. In this blog post, we illustrate this process and go over a few examples.

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### How to Analyze Beam Sections Using the Beam Section Calculator

##### Rémi Magnard February 28, 2017

When modeling a structure with beam elements, we don’t use the actual 3D geometry. Instead, we use a line model, which represents the other two dimensions through defining a set of cross-section properties. With the Beam Section Calculator simulation app, we can easily find the properties for a wide range of beam sections from European and American standards. The app also makes it simple to accurately compute the stress distribution for a given set of applied moments and forces.

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### How to Use Topology Optimization Results as Model Geometries

##### Hanna Gothäll February 1, 2017

Topology optimization can be a useful step in your design process, but the generated designs often require further analysis. With the COMSOL Multiphysics® software, you can create geometries out of your topology optimization result plots and easily export them to CAD software. In this blog post, we discuss how to do so, using both 2D and 3D examples.

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### How to Analyze Your SOLIDWORKS® Designs with an App

##### Lorant Olasz November 24, 2016

For many years, it’s been possible to analyze synchronized CAD geometries in COMSOL Multiphysics® via the LiveLink™ interfacing products. But did you know that you can also incorporate this functionality into an easy-to-use simulation app? With an app, you can dynamically modify your geometry in a CAD program such as SOLIDWORKS® and use this information to analyze new product designs. Today, we will demonstrate how to do so, using the new Bike Frame Analyzer app as an example.

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### Studying the Migration of Mineral Oil Hydrocarbons in Food Packaging

##### Bridget Cunningham November 17, 2016

Food packaging is often composed of recycled materials, like newspapers or plastic, which may contain residual mineral oil inks. Traces of these potentially hazardous substances leftover from the recycled materials can migrate from the packaging to the stored food. To account for this, one research team developed a numerical model to analyze the migration patterns of mineral oil hydrocarbons for various packaging situations. Compared to experimental studies, their approach offers a more efficient and cost-effective way of optimizing food safety.

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### AltaSim Uses Simulation to Improve Bolometer Sensitivity

##### Caty Fairclough June 15, 2016

Bolometers have the ability to detect and measure the power of incident electromagnetic radiation. This allows them to be used in a range of technologies, from night vision cameras to far-reaching astronomy projects. Designing bolometers often requires devoting a lot of time and energy to the development phase, as these devices must be optimized for sensitivity and customized for their specific applications. To efficiently design bolometers with increased sensitivity, AltaSim Technologies utilized the simulation capabilities of COMSOL Multiphysics.

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### Simulating a 3D Multilayered Graphene Biosensor Design

##### Bridget Cunningham May 2, 2016

Graphene is a material with a strong presence — and impact — throughout the scientific community. Amongst its many uses, researchers are looking to graphene as a potential material solution within sensor designs for medical and biosensing applications. Today, we’ll explore the role of simulation in analyzing and optimizing a 3D multilayered graphene biosensor.

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### Deformed Mesh Interfaces: Rotations and Linear Translations

##### Walter Frei September 7, 2015

When using the finite element method, we often want to model solid objects that are rotating and translating within other domains. The deformed mesh interfaces in COMSOL Multiphysics can be used to model these movements. In this blog post, we will look at the modeling of large linear translations and rotations of domains within other domains, while introducing efficient modeling techniques for addressing such cases.

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### Model Translational Motion with the Deformed Mesh Interfaces

##### Walter Frei September 4, 2015

COMSOL Multiphysics includes two interfaces for manually defining the deformation of finite element mesh, the Deformed Geometry interface and the Moving Mesh interface. In this blog post, we will address when to use these interfaces and how to use them to efficiently model translational motion.

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### How to Model Magnetic Bearings in COMSOL Multiphysics®

##### Nirmal Paudel July 28, 2015

Magnetic bearings are used in many industrial applications, including power generation, petroleum refinement, turbo machinery, pumps, and flywheel energy storage systems. Unlike mechanical bearings, these types of bearings support moving loads without physical contact through magnetic levitation. Valued for their frictionless operation and ability to run without lubrication, magnetic bearings are a low-maintenance alternative to mechanical bearings with a longer lifespan. Learn how to calculate design parameters like magnetic forces, torque, and magnetic stiffness using the COMSOL Multiphysics® software.

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### Which Module Should I Choose for Working with My CAD Data?

##### Walter Frei April 14, 2015

There are several different add-on modules to the COMSOL Multiphysics® software for working with external CAD and ECAD data. These modules allow both unidirectional and bidirectional data transfer between the COMSOL Multiphysics analysis tools and the CAD and ECAD software that you are using for design. In this blog post, we will cover the functionality of these various modules and describe why you may want to use them.

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