Investigation of the Effects of Geometric and Structural Parameters of Carbon Nanotubes on Sound Absorption in an Argon Gas Environment Using a Molecular Dynamics Simulation Approach

Authors

1 Associate Professor, Department of Physical Chemistry, Faculty of Science, Yazd University, Yazd, Iran

2 PhD Student, Department of Physical Chemistry, Faculty of Science, Yazd University, Yazd, Iran

3 Associate Professor, Department of Mechanical Engineering, Yazd University, Yazd, Iran

Abstract

Noise pollution poses a significant threat to human health and ecosystem stability. Carbon-based nanostructures, with their exceptional mechanical strength and unique geometries, offer a promising strategy for nanoscale sound absorption. In this study, molecular dynamics simulations were employed to examine acoustic wave propagation and absorption in argon gas. The model was first validated without an absorber, followed by an analysis of how nanotube diameter, quantity, arrangement, and frequency influence key acoustic parameters, including attenuation, wave number, and absorption coefficient. Findings indicate that larger nanotube diameters enhance effective contact area, while increasing the number of nanotubes shortens molecular free paths, thereby improving absorption. A triangular arrangement maximized absorption by confining space and intensifying gas–wall interactions. Frequency-dependent analysis showed a clear correlation between frequency, attenuation, and absorption, aligning with previous studies and confirming the simulation’s validity. The study is limited to argon gas and single-walled nanotubes of restricted dimensions. Nonetheless, the results underscore the critical role of optimizing nano-absorber geometry and structural parameters for designing effective high-frequency noise-control systems.

Keywords

Main Subjects

Journal of Solid and Fluid Mechanics
Volume 15, Issue 6
January and February 2025
Pages 475-489

Files

Share

How to cite

Statistics