Acoustics

The field of acoustics is diverse and so is the need for computational tools supporting it.  Veryst provides acoustic simulation expertise in applications including automotive noise control, room acoustics, miniature speakers, musical instruments, MEMS acoustic sensors and actuators, and nondestructive testing.  We assist engineers with valuable and timely design insights that help optimize their products and evaluate new design concepts.

In many cases, the acoustic problem cannot be solved in isolation from other physics, specifically structural, fluid, electric, and heat transfer.  This multiphysics coupling between acoustics and other phenomena typically becomes more significant as the devices get smaller.

Veryst is experienced with a wide range of formulations for conducting acoustic simulations, including acoustic tissue heating, pressure acoustics, acoustophoresis, aeroacoustics, linearized Navier-Stokes, thermoviscous acoustics, and ray acoustics for high frequency acoustic simulations.

The example below involves a lab-on-a-chip device for bodily fluids based on acoustophoresis.  This involves the motion of particles resulting from an oscillatory acoustic field.  This particular model, developed using COMSOL Multiphysics, involves pressure acoustics, solid mechanics, electric field, fluid flow, and particle tracing.  Geometry and particle properties used in this example are taken from available literature.  The figure shows the particle distribution across the channel, demonstrating effective particle focusing toward the channel center.  The computational model helps designers select the dimensions, materials, operating frequency, and flow rate of the device.

 

 

Acoustophoretic particle focusing in a microchannel, as well as deformation and von Mises stress in the device

Acoustics Piezoelectric Actuator
 

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When a thin structure is immersed in a fluid, its natural frequencies, mode shapes, and damping characteristics may be significantly affected by the fluid. Predicting the dynamic behavior in this case requires a structural-acoustic analysis.

Guest editorial in COMSOL News 2017 Acoustics Edition

July 7, 2017
Dr. Nagi Elabbasi has a guest editorial article in COMSOL News 2017 Acoustics Edition. The article is titled “How Computational Acoustics Benefits from Multiphysics” and discusses some of the developments and challenges in acoustic simulation

Acoustics panel moderator

October 3, 2018
Dr. Elabbasi moderated a panel discussion on “Modeling Strategies for Acoustics Simulations” at COMSOL Conference 2018 Boston.  The panel discussed the use of different modeling strategies depending on the frequency range, model size, and details included in the physics used. 

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