Thermal resonance induced by quasi-Casimir coupling for innovative nanoscale thermal management

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K20412
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0301:Mechanics of materials, production engineering, design engineering, fluid engineering, thermal engineering, mechanical dynamics, robotics, aerospace engineering, marine and maritime engineering, and related fields
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: CHEN WENTAO 九州工業大学, 大学院工学研究院, 研究職員 (30963201)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: 準カシミヤカプリング / ナノギャップ / フォノン熱輸送 / 熱共振 / 分子動力学解析

Outline of Final Research Achievements

In vacuum, the gap distance is a key factor since phonon transmission dominates the heat exchange between two objects. Interfacial thermal resonance induced by quasi-Casimir coupling plays a critical role in facilitating extreme near-field heat transfer across a nanogap. However, the understanding of quasi-Casimir coupling between adsorbed liquid layers or diatomic molecular layers remains unclear. In this study, phonon heat transfer across a nanogap via adsorbed liquid layers and SiC-SiC nanogap with four kinds of atomic surface terminations were investigated. Our findings demonstrate that the thermal resonance exists between two adsorbed liquid layers or identical atomic terminated layers, resulting in the enhanced phonon transmission across the nanogap.

Free Research Field

熱工学

Academic Significance and Societal Importance of the Research Achievements

This study provides a deeper understanding of phonon transmission across a nanogap in extreme near-field heat transfer, which is crucial for advancing thermal management systems. Enhanced thermal management strategies could realizing the energy-efficient devices with reduced energy consumption.