1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
2. Samuel Mao Institute of New Energy, Shenzhen, Guangdong 518031, China
3. Department of Mechanical Engineering, University of California at Berkeley, Berkeley, California 94720, USA
4. Masdar Institute, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates