These notes originated from a series of lectures given at Waseda University in April–May
2021, supported by Top Global University Project of Waseda University. The first author …

This study applies uncrewed aircraft systems towards the investigation of surface-layer
structure during the morning transition. Three uncrewed aircraft systems simultaneously …

Reduction of turbulent drag force is one of important works in the design of airplanes and
hypersonic aircrafts. The annular plasma synthetic jet (APSJ) has become an interesting and …

In turbulent flows, energy production is associated with highly organized structures, known
as coherent structures. Since these structures are three dimensional, their detection remains …

A series of laboratory experiments was conducted to understand the role of unsteady
coherent motions of turbulent flow in the onset of particle motion. Turbulent eddies having …

Laser-matter interactions with metal target cause plasma explosion and shock accelerated
variable density flow instabilities in the Semiconfined Configuration (SCC). Their study gives …

The sea cucumber Apostichopus japonicus (A. japonicus) is a benthic invertebrate with a
quasi-cylindrical body and several rows of papillae (conical prominence) on its body wall. As …

High-speed and low-speed streak structures in the near wall region of a turbulent boundary
layer with a Mach number of 3 are experimentally examined by employing the …

It is a well-known fact that the matching of experimental data to turbulence models have
hitherto not been successful. An example of this is the inability to theoretically predict the Re …

Tomographic particle image velocimetry (Tomo-PIV) was performed to study the initial
transition process formed in a free round jet between the laminar flow at the jet exit, and the …