Modeling Band Gaps and Scattering in Phononic Crystals

Phononic crystals are acoustic metamaterials that can be used in various microfluidic devices and as waveguides, collimators, isolators, and surface and bulk acoustic wave devices. When designing these crystals, it is essential to understand their dispersion and scattering characteristics, and simulation is a useful method for doing so.

In this webinar, Dr. C. Chandraprakash of IIT Kanpur talks about building models in COMSOL Multiphysics® to estimate the band gaps, reflectance, and transmittance in phononic crystals. After an introduction to acoustic metamaterials and phononic crystals, Chandraprakash explores the advantages of the finite element method and different governing equations. Later, he offers a software demonstration that goes through a variety of examples from his recent work on two- and three-dimensional models.

Dr. C. Chandraprakash is an assistant professor of mechanical engineering at IIT Kanpur, India. He received his bachelor of technology and masters of technology degrees in mechanical engineering from IIT Madras, India, before going on to earn his PhD in engineering science and mechanics from Pennsylvania State University.

Kapitelauswahl

Phononic crystals (1:13) Geometry (14:17) Governing equations (18:46) Intricacies of meshing (27:42) Solvers (30:07) Validation (34:59) Our work (37:01) Demo (40:55)