1. Mechanical Engineering Department, Petra Christian University, Surabaya, Indonesia
2. Centre for Sustainable Energy Studies, Petra Christian University, Surabaya, Indonesia
3. Institute of Fluid Science, Tohoku University, Sendai, Japan
4. Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, Koriyama, Japan
5. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore
6. Department of Aerospace and Geodesy, Technical University of Munich, Taufkirchen/Ottobrunn, Germany