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Technical Brief

Hybrid Atomistic-Continuum Simulation of Nanostructure Defect Induced Bubble Growth

[+] Author and Article Information
Yijin Mao

Department of Mechanical and Aerospace Engineering University of Missouri Columbia, Missouri, 65211, USA
MaoY@missouri.edu

Bo Zhang

Department of Mechanical and Aerospace Engineering University of Missouri Columbia, Missouri, 65211, USA
bz7v2@mail.missouri.edu

Chung-Lung Chen

Department of Mechanical and Aerospace Engineering University of Missouri Columbia, Missouri, 65211, USA
chencl@missouri.edu

Yuwen Zhang

Department of Mechanical and Aerospace Engineering University of Missouri Columbia, Missouri, 65211, USA
zhangyu@missouri.edu

1Corresponding author.

ASME doi:10.1115/1.4036692 History: Received September 23, 2016; Revised May 01, 2017

Abstract

Effects of nanostructured defects of copper solid surface on the bubble growth in liquid argon have been investigated through a hybrid atomistic-continuum method. The same solid surfaces with five different nanostructures, namely, wedge defect, deep rectangular defect (R-I), shallow rectangular defect (R-II), small rectangular defect (R-III) and no defect, have been modeled at molecular level. The liquid argon is placed on top of the hot solid copper with superheat of 30 K after equilibration is achieved with CFD-MD coupled simulation. Phase change of argon on five nanostructures has been observed and analyzed accordingly. The results showed that the solid surface with wedge defect tends to induce a nano-bubble relatively more easily than the others, and the larger the size of the defect is the easier the bubble generate.

Copyright (c) 2017 by ASME
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