Investigation of Microscopic Process of Bubble Inception in Quantum Liquid Hydrogen

2015 Fiscal Year Final Research Report

• Project/Area Number: 26820042
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Kyushu University
• Principal Investigator: Tsuda Shinichi 九州大学, 工学(系)研究科(研究院), 准教授 (00466244)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 量子性 / 水素 / 気泡核 / キャビテーション

Outline of Final Research Achievements

The aim of this study is a clarification of the effect of quantum nature of liquid hydrogen (uncertainty of the position of the atomic nucleus and momentum) on the bubble inception rate, which is the indicator of the ease of bubble formation. Therefore, molecular simulation to reproduce the liquid hydrogen state in the molecular scale was conducted, and the following two results were obtained. (1)The quantum nature of hydrogen decreases the bubble inception rate by 5-10 orders from a macroscopic point of view (thermodynamic point of view). (2) The quantum nature has an effect to increase the molecular volume apparently from a microscopic (molecular) point of view, and this effect is one of the causes of the above result (1).

Free Research Field

流体工学