1. Department of Mechanical
Systems Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527 Japan
2. Division of Energy and Environmental
Engineering, Hiroshima University, 1-4-1
Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527 Japan