Plane dilatational and shear waves in a chiral porous thermoelastic medium under strain gradient theory
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 11 October 2024
Issue publication date: 26 November 2024
Abstract
Purpose
This study aims to investigate time-harmonic wave propagation in a chiral porous thermoelastic solid under strain gradient theory (SGT), focusing on identifying and characterizing distinct wave modes within the medium.
Design/methodology/approach
Using Iesan's gradient theory, which incorporates chiral effects and accommodates second sound phenomena, the authors derive mathematical formulations for the velocities and attenuations of eight propagating waves: four dilatational waves and two pairs of coupled shear waves (one left circularly polarized, the other right). Numerical simulations are performed for a specific model, exploring the influence of various parameters on wave propagation.
Findings
The authors establish that the medium supports four dilatational waves, including a microstretch-associated wave, and four shear waves, distinguished by their chiral-induced characteristics. The results highlight the frequency-dependent dispersive nature of all propagating waves and establish connections with existing theoretical frameworks, demonstrating the broader applicability of our findings.
Practical implications
The characteristics of wave propagation in chiral media examined here can enhance our understanding of chiral medium behavior. This knowledge is crucial for developing materials with pronounced chiral effects, surpassing those found in natural chiral materials like bone, quartz, sugar and wood. Advances in artificial chiral materials are driven by their superior toughness, durability and other beneficial properties. Consequently, this study has potential applications across various fields, including the design of chiral broadband absorbers and filters, the production of artificial bones and medical devices, aeronautical engineering and beyond.
Originality/value
This research extends existing theories and deepens the understanding by exploring wave behaviors in chiral media, advancing this emerging field.
Keywords
Acknowledgements
Aakash Kumar, gratefully acknowledges the financial support provided by the Council of Scientific and Industrial Research, New Delhi, INDIA, in the form of a Senior Research Fellowship (SRF) under Grant No. 09/1256(0008)/2020-EMR-I. Suraj Goyal, expresses sincere thanks to the Research and Development Cell at J. C. Bose University of Science and Technology, YMCA, for funding provided under Research Project Ref. No. R\&D/SG/2023/1590. The authors sincerely thank the editor and anonymous reviewers for their valuable and constructive feedback, which has significantly enhanced the quality and relevance of this manuscript.
Funding: Council of Scientific and Industrial Research, New Delhi, India under Grant No. 09/1256(0008)/2020-EMR-I; Research and Development Cell at J. C. Bose University of Science and Technology, YMCA, Faridabad, India under Ref. No. R&D/SG/2023/1590.
Citation
Kumar, A. and Goyal, S. (2024), "Plane dilatational and shear waves in a chiral porous thermoelastic medium under strain gradient theory", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 34 No. 12, pp. 4233-4256. https://doi.org/10.1108/HFF-06-2024-0453
Publisher
:Emerald Publishing Limited
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