News

We are seeking highly motivated Ph.D. course students who are eligible to apply the MEXT scholarship . Please feel free to contact us for more information.

We are also looking for new collaborators from both academia and industry. Please check out our Research and Facilities.

  • 2024-10-01, We now have a new member, Ali. Welcome!!!
  • 2024-10-01, New paper on the water entry of twin spheres is now accepted for publication in Ocean Engineering!
  • 2024-09-20, Our undergraduate students presented their work for the interim progress for their graduation.
  • 2024-09-19, Aki delivered a presentation at the 2024 JSEM Annual Conference on Experimental Mechanics @ Yonezawa, Yamagata.
  • 2024-09-06, Aki delivered a presentation at the Multiphase Flow Symposium 2024 @ Toyama.
  • 2024-09-05, Kang delivered an oral presentation on Proposal of a Hybrid Urine Flow Estimation Method Combining Urination Sound and Urination Image at the 31rd The Japanese Continence Society held in Fukushima.
  • 2024-08-26, Hayato (M2) and Aki presented their work at ICTAM 2024 @ Daegu, Korea.
  • 2024-05-17, Kang received the Hatakeyama Research Grant from the Turbomachinery Society of Japan.
  • 2024-05-17, Kambayashi Izuru (D3), Sase Ryoya (M2), Maruyama Shunsuke (M2), and Muraoka Shinsuke (M2) presented their work at the 90th Turbomachinery Society conference.
  • 2024-04-18, Kiyama received the JSME Young Engineers Award from the Japan Society of Mechanical Engineers.
  • 2024-04-08, New undergraduate and graduate students have joined our Lab. You can find the new members on the "Members" page of our homepage.
  • 2024-03-26, Nemoto,Kanata (M2) has been honored with the Japan Society of Mechanical Engineering Miura Award. Congratulations!
  • 2024-03-26, Our undergraduate and graduate students graduated on March 25th. Wishing them all the best. Conguraturation!! Picture
  • 2024-03-19, New paper on the toroidal bubble formation upon popper snapping is now available on Physical Review Fluids!
  • 2024-03-13, Our undergraduate students presented their work at the JSME Kanto branch (63th students' meeting).
  • 2024-03-08, Kobayashi,Takuo (M2) has been honored with Saitama University President's Award. Congratulations!
  • 2024-03-05, Kiyama gave a talk on the interaction between a laser-induced cavitation/shock waves and flexible structures at the Symposium on Shock Waves in Japan held in Kokura, Fukuoka.
  • 2024-01-19, Kang delivered an oral presentation on analytical study of active control on cavitation surge in hydraulic system at the 3rd Asian Workshop on Hydraulic Machinery held in Seoul.
  • 2024-01-09, New paper on the interaction of two laser-induced bubbles is now available on Physics of Fluids!
  • 2024-01, Our new homepage is now launched.

Projects

Laser-induced Cavitation

The liquid jet formation upon the collapse of two interacting cavitation bubbles is a physics-rich complex problem, which has possible implications such as the membrane sonoporation.

Dynamic Characteristics of Turbomachinery

To design a reliable turbomachinery under unexpected unsteady conditions, we evaluated the dynamic transfer matrix of a three-dimensional centrifugal impeller.

Active Control for Cavitation Surge in Inducer for Rocket Engines

The present study develops the linear and non-linear active control models for cavitation surge in rocket engines.

Water Entry Dynamics

Water entry is related to various engineering applications and even human/animal behaviors. We use a high-speed video camera to understand the complex yet beautiful interaction between the water entry cavity and surrounding boundaries. We are also interested in splash formation and underwater acoustics.

Flexible Slamming

A flexible hemispherical shell can snap due to its bistability. A rubber popper toy is a well-known example: it is even powerful enough to cause underwater cavitation, with assistance from a rigid substrate placed underneath.

Bursting on the top

A heated water droplet can easily explode in or on the cooking oil, resulting in droplets scattering. The size of the heated oil droplets seems to be dominated by the bubble dynamics. We employ both high-speed imaging and acoustic sensing to detect/predict the amount of oil aerosol that might occur, which would ultimately contribute to improving the indoor environment.

Estimation for dynamic characteristics of cavitating pump

The present research numerically evaluated the dynamic characteristics for a cavitating pump in a two-dimensional cascade flow using dynamic mode decomposition control (DMDc)

Digital twin of turbomachinery

We propose an estimation method using Singular Value Decomposition (SVD) to estimate the internal flow field of turbomachinery. These estimation methods facilitate real-time assessment of the turbomachinery's internal flow field without the necessity of solving the Navier-Stokes equations during the estimation process.

Inverse design for Turbomachinery

The optimization of the turbine and guide vane geometries were performed based on the acquired learning data.

Unsteady flow around impeller with forward curved vanes

By visualizing this rotating cell, we aim to elucidate the mechanism governing its direction and speed.

Active control of flow separation

We utilize dynamic mode decomposition with control (DMDc) to analyze a separated flow in an enlarged rectangular pipe and to develop a feedback control system.

Construction of a digital twin for hydrogen generation reactor

we construct a digital twin of the actual reactor in cyberspace, leveraging point datasets obtained through physical experimentation.

Impinging jet to perforated plates

The objective of this study is to derive equations predicting jet velocity through porous plates.

Thrust and transport Characteristics of Synthetic Jets

A model with nozzles installed axisymmetrically, each with different generation conditions, enables the generation of thrust in both directions, leading to improved fluid control performance.

Urinary flow rate estimation using sparse singular value for portable urinary flow measurement devices

This study aims to diagnose urinary disorders early by attempting portable urine flow measurement from urinary images and sound data.