The combination of comsol products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Northeast to engage in product demonstrations, hear from keynote speakers. Browse these and more cfd module updates and features below. Jensen, and mats nigam of comsol discuss upcoming software features. When defining and solving these problems, the fluid is modeled as incompressible by default but can. Samsung amps up loudspeaker designs with simulation. Several of the problems include fluidheat transfer interactions computational heat transfer cht. The remarkable q series bookshelf speakers excel when space is limited. Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. Bjorn sjodin, daniel smith, svante littmarck, kristian e. This is an iterative linear solver that can be used for a number of different applicationsperhaps the most important is cfd, confirmed bjorn sjodin, vp of product management, comsol. Coupling smartuqs predictive analytics solutions to comsol. All of the features listed below are implemented through associated physics interfaces.
When the original elac b6 bookshelf speakers came out, i bought those and have loved them for almost 2 years. Watch how acoustics properties of a speaker can be computed with ansys mechanical. Learn how to study the performance of a loudspeaker driver using comsol multiphysics simulation software. Nowadays, the acoustic horn is a common element used in electrodynamic loudspeakers or for signaling on ships and trains. Wednesday, october 4 svante littmarck is the president and ceo of comsol, inc. Below, we compare the characteristics of an ole wolff microspeaker with a simulation of the speaker, using the comsol multiphysics. Get inspired by examples of using multiphysics simulation to analyze acoustics and vibrations in products and designs, and learn how on the comsol blog. View the schedule for minicourse topics and presentation details.
Events include the annual comsol conference, local comsol days, and inperson workshops. Loudspeaker driver tutorial model comsol multiphysics. This benchmark model of a bessel panel demonstrates that using the comsol multiphysics software and addon acoustics module is a valid. Simulating plasmonic effects with comsol multiphysics. In this model, a full transient analysis of a loudspeaker driver is performed, which allow. For users of the cfd module, comsol multiphysics version 5. A step by step simple modeling using piezoelectric transducer. Analyzing a loudspeaker array with a bessel panel benchmark model. Join us at this comsol day to see firsthand how multiphysics simulation can. Optimizing microspeaker designs using simulation comsol blog. The acoustic pressure profile obtained from the nonlinear timedomain modeling for the 70hz input signal deviates from the sinusoidal shape to a certain extent, which means that higherorder harmonics start playing a. Correlation can be used to understand what parts of the model show a good level of accuracy and what parts may need a more detailed modeling approach. In 2004, littmarck received an honorary doctoral degree from the royal institute of technology for the development and.
Loudspeaker driver in a vented enclosure comsol multiphysics. Simulating plasmonic effects with comsol multiphysics archived. When you expand comsol multiphysics with the cfd module, you have access to features for specialized cfd simulations in addition to the core functionality of the comsol multiphysics software platform. Learn how to perform a full vibroacoustic analysis of a loudspeaker using a hybrid bemfem approach with the comsol software. You are invited to join us at comsol day bristol for a day of multiphysics modeling training, talks by invited speakers, and the opportunity to exchange ideas with other simulation specialists in the comsol community.
At low frequencies, a speaker will spread sound everywhere like the glow of a light bulb, it is said to be omnidirectional, while at high frequencies. The boundary element method bem is included in the acoustics module as a physics interface. The following example demonstrates techniques for modeling a fluidstructure interaction containing two fluid phases in comsol multiphysics. Combining the physics in comsol multiphysics is seamless, says bezzola, so you dont have to worry about coupling. View the major updates and download the software here. He received his masters degree in chemical engineering from the georgia institute of technology. Presentation done by mina sierou and shankar krishnan. In this archived webinar, learn how to model loudspeakers in the comsol multiphysics software, including loudspeaker drivers, enclosures, and listening environments in the webinar, you will get a stepbystep demonstration of how to perform a detailed electromagnetic analysis of a driver and an acousticstructure interaction study of its mechanical and acoustic performance. Free and paid events offering a variety of learning opportunities. The model uses the acousticshell interaction, frequency domain multiphysics interface and therefore requires the structural mechanics module. We will first discuss the offtheshelf functionality in comsol multiphysics for this. Jaymin patel is an applications engineer at comsol. In this archived webinar, find out how to couple smartuqs predictive analytics solutions to simulations in the comsol multiphysics software. Featuring the signature kef uniq driver array with computational fluid dynamics cfd port design, the q350s deliver detailed natural sound with high clarity and tight bass.
Cerncourier v o l u m e 5 6 n u m b e r 7 s e p t e m b e r 2 0 1 6. These plots depict the acoustic pressure at the listening point located about 14. We demonstrate a large eddy simulation of the turbulent flow in a channel. His focus is on products related to cfd, heat transfer, and chemical engineering. A coil is placed in the air gap that winds perpendicular to the magnetic flux lines and is mechanically connected to the membrane of the speaker. Particular functionality may be common to several products. A high level of correlation can be achieved using comsol multiphysics based on the geometry of the speaker and a set of relatively simple assumptions. For users of the acoustics module, comsol multiphysics version 5. First, computational fluid dynamics cfd experts will be excited to see that the biggest improvement comes from the algebraic multigrid amg solver. Further improvements include an array of new physics features and options as well as new postprocessing tools. In this presentation, you will get a live demonstration of how to create a large eddy simulation les of turbulent channel flow. View all comsol day locations join us online for comsol day northeast to engage in product demonstrations, hear from keynote speakers, and participate.
Acoustics module application galerie beispiele comsol. Join us at this comsol day to see firsthand how multiphysics simulation can benefit your work. Recently my old sony receiver crapped out and i purchased the yamaha rxv385 and sewell cables which really pumps out quality sound into these. Loudspeaker driver in a vented enclosure application id. The comsol multiphysics software is a multiphysics simulation tool for performing multicomponent and multiphysics analyses. Multiphysics simulation analysis loudspeaker drivers. Acoustics analysis of a speaker using fea tools from ansys ansys techtips. Learn about these multibody dynamics features below. Regarding comsol, it actually has a fairly steep learning curve with regards to getting cfd to work.
To design the best loudspeaker possible, samsung audio lab uses a combination of multiphysics simulation, validation, and testing. This response is included in a 3d model where the vibroacoustic response of the speaker is analyzed and compared with measurements. Starting from the geometry of the speaker, an axisymmetric electromagnetic model is used to characterize the frequencydependent response of the voice coil and electromagnetic circuit. Combining the physics in comsol multiphysics is seamless, says bezzola, so you. At first, horn speakers could not amplify sound very far. Learn more about these and many more acoustics module updates below. In this 18minute archived webinar, learn the basics of cfd modeling with the comsol multiphysics software. To solve for the sound radiation from the idealized speaker panel, we can take advantage of both the boundary element method bem and finite element method fem using a hybrid approach, available as of version 5.
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