| 研究課題/領域番号 |
22K20412
|
|---|
| 研究種目 |
研究活動スタート支援
|
| 配分区分 | 基金 |
|---|
| 審査区分 |
0301:材料力学、生産工学、設計工学、流体工学、熱工学、機械力学、ロボティクス、航空宇宙工学、船舶海洋工学およびその関連分野
|
|---|
| 研究機関 | 九州工業大学 |
|---|
研究代表者 |
陳 文涛 九州工業大学, 大学院工学研究院, 支援研究員 (30963201)
|
|---|
| 研究期間 (年度) |
2022-08-31 – 2024-03-31
|
| 研究課題ステータス |
交付 (2022年度)
|
| 配分額 *注記 |
2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
2023年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2022年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
|
|---|
| キーワード | 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 |
|---|
| 研究開始時の研究の概要 |
Phonon heat transfer can be induced by quasi-Casimir coupling due to molecular interaction across a nanogap without electromagnetic fields. However, the quasi-Casimir coupling between the nanostructures and adsorbed water layers on the solid surfaces is still open for question. Therefore, we will verify phonon transmission across a nanogap via nanostructures and adsorbed water layers, focusing on quasi-Casimir coupling and thermal resonance.
|
| 研究実績の概要 |
Quasi-Casimir heat transfer, a new heat transfer mode in the transition regime from heat conduction to thermal radiation, results in the interfacial thermal resonance between two objects. However, the quasi-Casimir coupling between the nanostructures and adsorbed water layers on the solid surfaces is still open for question. Therefore, using nonequilibrium molecular dynamics, we will verify phonon transmission across a nanogap via nanostructures and adsorbed water layers, focusing on quasi-Casimir coupling and thermal resonance.
In the FY 2022, we performed molecular dynamics simulation using the package program LAMMPS. In the nanogap of Pt adsorbed with water molecules, thermal resonance phenomena and phonon transport at the interface were confirmed not only between solid molecules but also between liquid molecules. In a nonequilibrium state, the heat flux across the nanogap increases exponentially with decreasing gap distance, and the thermal resonance between the atoms of the liquid adsorption layers co-occurs with the thermal resonance between the atoms of the solid interface layers. Moreover, the effects of the SiC molecular termination atoms (Si-C, C-Si, Si-Si, and C-C) on the thermal resonance phenomena and phonon transport in the SiC nanogap were clarified.
These results have been presented at the 2022 Thermal Engineering Conference and published in Physical Chemistry Chemical Physics and Nanoscale by the Royal Society of Chemistry.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
In the FY 2022, we performed molecular dynamics simulation using the package program LAMMPS. We confirmed thermal resonance phenomena and phonon transport at the interface not only between solid molecules but also between liquid molecules in the nanogap of Pt adsorbed with water molecules. In a nonequilibrium state, the heat flux across the nanogap increases exponentially with decreasing gap distance, and the thermal resonance between the atoms of the liquid adsorption layers co-occurs with the thermal resonance between the atoms of the solid interface layers. Moreover, the effects of the SiC molecular termination atoms (Si-C, C-Si, Si-Si, and C-C) on the thermal resonance phenomena and phonon transport in the SiC nanogap were clarified. These results have been presented at the 2022 Thermal Engineering Conference and published in Physical Chemistry Chemical Physics and Nanoscale by the Royal Society of Chemistry.
|
| 今後の研究の推進方策 |
We will study phonon transmission across a nanogap via nanostructures to achieve a new thermal switch driven by thermal resonance when heat transfer between two objects should be dynamically modulated without temperature change. We will analyze phonon transmission across a nanogap including adsorbed water layers with and without an external electric field.
|
