Zobrazeno 1 - 10
of 226
pro vyhledávání: '"Kyuichi Yasui"'
Publikováno v:
Ultrasonics Sonochemistry, Vol 106, Iss , Pp 106893- (2024)
The impact of hydrostatic pressure, commonly known as ambient or external pressure, on the phenomenon of sonochemistry and/or sonoluminescence has been extensively investigated through a multitude of experimental and computational studies, all of whi
Externí odkaz:
https://doaj.org/article/99cce6054a9a47fc84c7845c8722235c
Autor:
Kyuichi Yasui, Koichi Hamamoto
Publikováno v:
AIP Advances, Vol 13, Iss 4, Pp 045222-045222-4 (2023)
The porosity after solid-state sintering is theoretically estimated by using a simple physical model with empirical formulas as a function of applied pressure and initial particle size. The comparison with the experimental data has revealed that tigh
Externí odkaz:
https://doaj.org/article/7db15e81724f4a26ac33473956945f7e
Autor:
Kyuichi Yasui
Publikováno v:
Ultrasonics Sonochemistry, Vol 93, Iss , Pp 106276- (2023)
The broad-band noise has been experimentally used to monitor the cavitation activity in a sonochemical reactor, an ultrasonic cleaning bath, a biological tissue, etc. However, the origin of the broad-band noise is still under debate. In the present r
Externí odkaz:
https://doaj.org/article/defe09e7e3c54d5c97ee2e1888b27835
Autor:
Toru Tuziuti, Kyuichi Yasui
Publikováno v:
Ultrasonics Sonochemistry, Vol 88, Iss , Pp 106084- (2022)
Ultrasonic impregnation is thought to be an effective way of permeation of liquid into material through the material-surface reforming with the attack by an ultrasonic cavitation jet or by the shock wave emitted from a collapsing bubble, or through d
Externí odkaz:
https://doaj.org/article/bdcfdef6b84a43389185f0dc3ffed6f1
Autor:
Kyuichi Yasui
Publikováno v:
Molecules, Vol 28, Iss 10, p 4198 (2023)
It has been experimentally reported that not only oxidation reactions but also reduction reactions occur in aqueous solutions under ultrasound without any additives. According to the numerical simulations of chemical reactions inside an air or argon
Externí odkaz:
https://doaj.org/article/d6b6fe24f534402eaebf9264acee7d25
Autor:
Kyuichi Yasui, Koichi Hamamoto
Publikováno v:
AIP Advances, Vol 12, Iss 4, Pp 045304-045304-8 (2022)
Numerical models of solid-state and liquid-phase sintering of CaCO3 at room temperature are developed for applied static pressures as high as 280 MPa. Under the applied static pressure of 280 MPa, solid-state sintering (dry pressing) also works at ro
Externí odkaz:
https://doaj.org/article/9c11d54118244ddf85f96dfd13cd54d6
Autor:
Kyuichi Yasui
Publikováno v:
Ultrasonics Sonochemistry, Vol 78, Iss , Pp 105728- (2021)
Numerical simulations for sonochemistry are reviewed including single-bubble sonochemistry, influence of ultrasonic frequency and bubble size, acoustic field, and sonochemical synthesis of nanoparticles. The theoretical model of bubble dynamics inclu
Externí odkaz:
https://doaj.org/article/27f73b54c287474ebe579771d13aca5f
Publikováno v:
Ultrasonics Sonochemistry, Vol 76, Iss , Pp 105646- (2021)
The present study mainly examined the effects of the volumetric concentration of nanobubbles (ultrafine bubbles) on the intensity of sonoluminescence (SL). The addition of nanobubbles at high acoustic amplitude enhanced the SL intensity for various b
Externí odkaz:
https://doaj.org/article/0c78a92e3a74445c9b076fac13d8bbd2
Autor:
Kyuichi Yasui
Publikováno v:
Molecules, Vol 27, Iss 18, p 5860 (2022)
In comparison with the first-principles calculations mostly using partial differential equations (PDEs), numerical simulations with modeling by ordinary differential equations (ODEs) are sometimes superior in that they are computationally more econom
Externí odkaz:
https://doaj.org/article/ccc7c6ff5dc34e7b8f96e746d9e8c67e
Autor:
Kyuichi Yasui
Publikováno v:
Molecules, Vol 27, Iss 15, p 4788 (2022)
In the present review, the production of O radicals (oxygen atoms) in acoustic cavitation is focused. According to numerical simulations of chemical reactions inside a bubble using an ODE model which has been validated through studies of single-bubbl
Externí odkaz:
https://doaj.org/article/ac5d0555134046b8b7b81066ff18bc22