Simulation Techniques: A Microacoustics Modeling Primer - Part 2

This two-part article is a deep-dive on the topic of modeling acoustic losses in small or narrow geometries, discussing various thermoviscous loss models, and categorizing these models into analytical and numerical approaches. After discussing the analytical implementation methods in the first part, this article now expands on the numerical modeling.

This two-part article is a deep-dive on the topic of modeling acoustic losses in small or narrow geometries, discussing various thermoviscous loss models, and categorizing these models into analytical and numerical approaches. Highlighting the respective implementation methods and computational requirements, the article emphasizes the importance of considering boundary layer thicknesses and frequency dependencies when choosing a model.

Standard simulations are closely tied to the analytical framework much more than the numerical. Simulation software gives insight into physical products that could not be achieved otherwise, often leading to less attention being paid to analytical methods and descriptive mathematical expressions related to the physical application. This article explores an analytical approximation method described as a perturbation approach.

COMSOL continues to expand the possibilities for simulation of real-world designs, devices, and processes, and now announced Version 6.3 of its COMSOL Multiphysics software. As largely anticipated in the recent series of conferences, COMSOL 6.3 introduces a new Electric Discharge Module, GPU-accelerated simulations, and many other updates. The Acoustics Module now offers GPU support for transient pressure acoustics, porous materials in the time domain, SLNS formulation for thermoviscous acoustics, anisotropic poroacoustics, and much more

COMSOL, the multiphysics modeling, simulation, and application design and deployment software company, announced the latest version of its COMSOL Multiphysics software. COMSOL Multiphysics version 5.5 introduces powerful geometry modeling tools, faster solvers, and two new products: the Metal Processing Module and the Porous Media Flow Module. Most of the new features and tools benefit directly all developers working with the COMSOL Acoustics module.