Abstract
Acoustic absorption by a carbon nanotube (CNT) was studied using molecular dynamics (MD) simulations in a molecular domain containing a monatomic gas driven by a time-varying periodic force to simulate acoustic wave propagation. Attenuation of the sound wave and the characteristics of the sound field due to interactions with the CNT were studied by evaluating the behavior of various acoustic parameters and comparing the behavior with that of the domain without the CNT present. A standing wave model was developed for the CNT-containing system to predict sound attenuation by the CNT and the results were verified against estimates of attenuation using the thermodynamic concept of exergy. This study demonstrates acoustic absorption effects of a CNT in a thermostatted MD simulation, quantifies the acoustic losses induced by the CNT, and illustrates their effects on the CNT. Overall, a platform was developed for MD simulations that can model acoustic damping induced by nanostructured materials such as CNTs, which can be used for further understanding of nanoscale acoustic loss mechanisms associated with molecular interactions between acoustic waves and nanomaterials.
Highlights
Interest in carbon nanotubes (CNTs) for various applications has grown rapidly because of their extraordinary properties and versatility in forming composite nanostructures
This study demonstrates acoustic absorption effects of a CNT in a thermostatted molecular dynamics (MD) simulation, quantifies the acoustic losses induced by the CNT, and illustrates their effects on the CNT
A platform was developed for MD simulations that can model acoustic damping induced by nanostructured materials such as CNTs, which can be used for further understanding of nanoscale acoustic loss mechanisms associated with molecular interactions between acoustic waves and nanomaterials
Summary
Interest in carbon nanotubes (CNTs) for various applications has grown rapidly because of their extraordinary properties and versatility in forming composite nanostructures. Structures can be fabricated with modified mechanical and thermal properties that act as promising soundabsorption materials for noise control.. The emergence of advanced manufacturing technologies offers exciting possibilities for creating tailored acoustic absorbers using CNTs.. The potential of CNTs and composite absorbers for use in noise-control applications has been investigated in various studies.. The acoustic absorption properties of CNTs have been measured in several studies.. The acoustic absorption properties of CNTs have been measured in several studies.10–12 These investigations have yielded promising results for the absorption characteristics of CNTs and highlighted the need for improved understanding of the absorption mechanisms of nanoscopic fibers at the nanoscale. Structures can be fabricated with modified mechanical and thermal properties that act as promising soundabsorption materials for noise control. In addition, the emergence of advanced manufacturing technologies offers exciting possibilities for creating tailored acoustic absorbers using CNTs. The potential of CNTs and composite absorbers for use in noise-control applications has been investigated in various studies. the acoustic absorption properties of CNTs have been measured in several studies. These investigations have yielded promising results for the absorption characteristics of CNTs and highlighted the need for improved understanding of the absorption mechanisms of nanoscopic fibers at the nanoscale.
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