Frictional drag reduction by bubble injection Y Murai Experiments in fluids 55, 1-28, 2014 | 220 | 2014 |

Interactive flow field around two Savonius turbines A Shigetomi, Y Murai, Y Tasaka, Y Takeda Renewable energy 36 (2), 536-545, 2011 | 169 | 2011 |

Skin friction reduction by large air bubbles in a horizontal channel flow Y Murai, H Fukuda, Y Oishi, Y Kodama, F Yamamoto International journal of multiphase flow 33 (2), 147-163, 2007 | 152 | 2007 |

Ultrasonic detection of moving interfaces in gas–liquid two-phase flow Y Murai, Y Tasaka, Y Nambu, Y Takeda Flow Measurement and Instrumentation 21 (3), 356-366, 2010 | 149 | 2010 |

Turbulent shear stress profiles in a bubbly channel flow assessed by particle tracking velocimetry Y Murai, Y Oishi, Y Takeda, F Yamamoto Experiments in Fluids 41, 343-352, 2006 | 124 | 2006 |

Particle tracking velocimetry applied to estimate the pressure field around a Savonius turbine Y Murai, T Nakada, T Suzuki, F Yamamoto Measurement science and technology 18 (8), 2491, 2007 | 116 | 2007 |

Power-saving device for air bubble generation using a hydrofoil to reduce ship drag: Theory, experiments, and application to ships I Kumagai, Y Takahashi, Y Murai Ocean Engineering 95, 183-194, 2015 | 115 | 2015 |

A novel algorithm for particle tracking velocimetry using the velocity gradient tensor M Ishikawa, Y Murai, A Wada, M Iguchi, K Okamoto, F Yamamoto Experiments in Fluids 29 (6), 519-531, 2000 | 106 | 2000 |

Two-way coupling of Eulerian–Lagrangian model for dispersed multiphase flows using filtering functions A Kitagawa, Y Murai, F Yamamoto International journal of multiphase flow 27 (12), 2129-2153, 2001 | 93 | 2001 |

Structure of air–water two-phase flow in helically coiled tubes Y Murai, S Yoshikawa, S Toda, M Ishikawa, F Yamamoto Nuclear engineering and design 236 (1), 94-106, 2006 | 91 | 2006 |

A new tracking algorithm of PIV and removal of spurious vectors using Delaunay tessellation X Song, F Yamamoto, M Iguchi, Y Murai Experiments in fluids 26 (4), 371-380, 1999 | 91 | 1999 |

Bubble velocity measurement with a recursive cross correlation PIV technique W Cheng, Y Murai, T Sasaki, F Yamamoto Flow Measurement and Instrumentation 16 (1), 35-46, 2005 | 88 | 2005 |

Ultrasonic Doppler technique for application to multiphase flows: A review C Tan, Y Murai, W Liu, Y Tasaka, F Dong, Y Takeda International Journal of Multiphase Flow 144, 103811, 2021 | 81 | 2021 |

Frictional drag reduction in bubbly Couette–Taylor flow Y Murai, H Oiwa, Y Takeda Physics of fluids 20 (3), 2008 | 79 | 2008 |

PIV measurement of particle motion in spiral gas–solid two-phase flow K Miyazaki, G Chen, F Yamamoto, J Ohta, Y Murai, K Horii Experimental Thermal and Fluid Science 19 (4), 194-203, 1999 | 78 | 1999 |

Drag reduction promoted by repetitive bubble injection in turbulent channel flows HJ Park, Y Tasaka, Y Oishi, Y Murai International Journal of Multiphase Flow 75, 12-25, 2015 | 71 | 2015 |

Postprocessing algorithm for particle-tracking velocimetry based on ellipsoidal equations T Ido, Y Murai, F Yamamoto Experiments in Fluids 32 (3), 326-336, 2002 | 65 | 2002 |

Three-dimensional measurement of void fraction in a bubble plume using statistic stereoscopic image processing Y Murai, Y Matsumoto, F Yamamoto Experiments in Fluids 30 (1), 11-21, 2001 | 62 | 2001 |

Experimental detection of bubble–bubble interactions in a wall-sliding bubble swarm A Kitagawa, K Sugiyama, Y Murai International journal of multiphase flow 30 (10), 1213-1234, 2004 | 56 | 2004 |

Development of an ultrasonic void fraction profiler Y Murai, S Ohta, A Shigetomi, Y Tasaka, Y Takeda Measurement Science and Technology 20 (11), 114003, 2009 | 54 | 2009 |