Journal articles, conference proceedings, USA patent, and dissertations spanning topological acoustics, thermoacoustic systems, metamaterials, and AI-driven design.
Peer-reviewed journal articles, conference proceedings, US patent, and doctoral & master’s dissertations.
Manimala, J., & Biswas, S. — International Patent WO 2025/128,348 A1 (PCT/US National Phase). Priority: US Provisional Application, Filed 2023.
A novel thermoacoustic meta-structure device that simultaneously achieves broadband noise mitigation and acoustic energy harvesting. The patented design incorporates spiral and helical resonator geometries with thermoacoustic stack elements enabling passive conversion of acoustic energy into thermal gradients and subsequently to electrical power. Validated at DFW Airport with 5+ dB noise reduction.
Biswas, S., Krawczyk, Z., & Manimala, J. M. — International Journal of Thermofluids, 2025.
Incorporating thermoacoustic elements into resonator cavities within engineered structures creates thermoacoustic metastructures (TAMS), enabling airborne noise mitigation, energy harvesting, and environmental sensing. This work presents a comprehensive multifunctional characterization of TAMS performance across acoustic, thermal, and energy harvesting domains.
Biswas, S., Kresl, W., & Manimala, J. M. — International Journal of Aeroacoustics, 24(1–2), 42–67, 2025.
Investigates embedding thermoacoustic stacks within acoustic liners for simultaneous acoustic absorption and thermal output optimization. Using Rott’s approximation, the stack’s pore width and wall thickness are optimized for additively manufactured test articles, achieving a peak steady-state temperature gradient of 9.5 °C at 790 Hz for 140 dB tonal dwells. Results show the temperature gradient correlates directly with acoustic power at the leading stack-face.
Biswas, S., & Manimala, J. M. — Proceedings of Meetings on Acoustics (POMA), 46(1), 030003, 2022.
Proof-of-concept evaluation of ceramic and polymeric stack designs using a custom-built thermoacoustic test rig, correlating stack parameters (material, length, location, porosity, pore geometry) to DeltaEC simulations. Results show ~5.28 dB reduction in sound pressure level at resonance (117.5 Hz) and a steady-state peak voltage of 33 mV for a ~30 °C temperature difference across the stack.
Biswas, S., & Manimala, J. M. — The Journal of the Acoustical Society of America, 151(4), A179, 2022. (182nd ASA Meeting, Denver, CO).
Presented at the 182nd Meeting of the Acoustical Society of America in Denver, CO. Demonstrates the feasibility of mechanically robust, noise-mitigating energy harvesters based on the thermoacoustic effect, converting environmental noise into usable electrical energy without moving parts.
Biswas, S., Krawczyk, Z., & Manimala, J. M. — INTER-NOISE and NOISE-CON Congress and Conference Proceedings, 263(5), 4376–4387, 2021.
Examines the mechanical and thermal properties as well as geometry of 3D-printed porous stacks for thermoacoustic energy conversion. The study demonstrates how additive manufacturing enables complex stack geometries that are difficult to achieve with traditional fabrication, optimizing performance for energy harvesting applications.
Nasreen, S., Rokunuzzaman, M., & Biswas, S. — International Conference on Mechanical, Industrial and Materials Engineering (ICMIME), RUET, Rajshahi, Bangladesh, 2017.
Develops an efficient and cost-effective approach to surface roughness measurement with Linear Variable Differential Transformer (LVDT), displaying output using LCD with standard deviations based on the Center Line Average (CLA) method. Utilizes microcontroller-based electronics to calibrate sensor data.
Biswas, S., & Khan, M. I. — International Conference on Mechanical, Industrial and Materials Engineering (ICMIME), RUET, Rajshahi, Bangladesh, 2017.
Presents a technique for selecting the most effective truss design from available truss structures for a specific purpose and further optimizing it for a given set of constraints using finite element analysis.
Biswas, S. — Doctoral Dissertation, Oklahoma State University, Stillwater, Oklahoma.
Doctoral dissertation presenting the complete development arc of Thermoacoustic Meta-Structures (TAMS): from fundamental phononic crystal theory through experimental validation and NASA Langley collaboration. Encompasses parametric design studies of spiral, helical, and modular resonator geometries; DeltaEC and COMSOL simulation frameworks; anechoic chamber characterization; and the dual-function noise mitigation and power generation platform culminating in Patent WO2025128348A1.
Biswas, S. — Master’s Thesis, Northern Arizona University, Flagstaff, Arizona.
Master’s thesis investigating the design and fabrication of structural supercapacitors for electric vehicle applications. Carbon fiber electrodes functionalized via CVD and plasma treatment achieve 53.58 mWh/kg energy density and 32.06 W/kg power density while maintaining 6.9 GPa flexural modulus.