Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Ida, Masato"'
Autor:
Ida, Masato
Bale et al. [1] perform a numerical study of droplet/aerosol transport in the air to assess the probability of airborne transmission of COVID-19 from an infected person to a nearby healthy person. In their numerical study, the air flow field is solve
Externí odkaz:
http://arxiv.org/abs/2310.14798
Autor:
Ida, Masato
Publikováno v:
Phys. Rev. E 79, 016307 (2009)
The interaction between microbubbles through pressure pulses has been studied to show that it can be a source of cavitation noise. A recent report demonstrated that the acoustic noise generated by a shrimp originates from the collapse of a cavitation
Externí odkaz:
http://arxiv.org/abs/0911.5187
Autor:
Ida, Masato
Publikováno v:
Phys. Fluids 21, 113302 (2009)
The inception of cavitation in multibubble cases is studied numerically and theoretically to show that it is different from that in single-bubble cases in several aspects. Using a multibubble model based on the Rayleigh-Plesset equation with an acous
Externí odkaz:
http://arxiv.org/abs/0911.5184
Autor:
Ida, Masato, Oshima, Nobuyuki
The Gaussian-filtered Navier-Stokes equations are examined theoretically and a generalized theory of their numerical stability is proposed. Using the exact expansion series of subfilter-scale stresses or integration by parts, the terms describing the
Externí odkaz:
http://arxiv.org/abs/physics/0606196
Autor:
Ida, Masato
Publikováno v:
Phys. Rev. E 72, 036306 (2005)
The resonance frequencies and oscillation phases of three acoustically coupled bubbles are examined to show that avoided crossings can appear in a multibubble system. Via a simple coupled oscillator model, we show that if at least three bubbles exist
Externí odkaz:
http://arxiv.org/abs/physics/0506080
Autor:
Ida, Masato, Taniguchi, Nobuyuki
Publikováno v:
Phys. Rev. E 69, 046701 (2004)
This paper extends our recent theoretical work concerning the feasibility of stable and accurate computation of turbulence using a large eddy simulation [Ida and Taniguchi, Phys. Rev. E 68, 036705 (2003)]. In our previous paper, it was shown, based o
Externí odkaz:
http://arxiv.org/abs/physics/0402025
Autor:
Ida, Masato
Publikováno v:
Comput. Phys. Commun. 150 (3) pp.300-323 (2003)
An improved numerical solver for the unified solution of compressible and incompressible fluids involving interfaces is proposed. The present method is based on the CIP-CUP (Cubic Interpolated Propagation / Combined, Unified Procedure) method, which
Externí odkaz:
http://arxiv.org/abs/physics/0203074
Autor:
Ida, Masato
Publikováno v:
J. Phys. Soc. Jpn. 73 (2004), pp.3026-3033
The theoretical results regarding the ``transition frequencies'' of two acoustically interacting bubbles have been verified numerically. The theory provided by Ida [Phys. Lett. A 297 (2002) 210] predicted the existence of three transition frequencies
Externí odkaz:
http://arxiv.org/abs/physics/0111138
Autor:
Ida, Masato
Publikováno v:
Phys. Lett. A 297 (2002) 210-217
Transition frequencies of two spherical gas bubbles interacting in an acoustic field are discussed theoretically. In the present study, transition frequency is defined as the frequency of external sound for which the phase difference between a bubble
Externí odkaz:
http://arxiv.org/abs/physics/0111133
Autor:
Ida, Masato
Publikováno v:
Comput. Phys. Commun. 143/2 pp.142-154 (2002)
The semi-Lagrangian method using the hybrid-cubic-rational interpolation function [M. Ida, Comput. Fluid Dyn. J. 10 (2001) 159] is modified to a conservative method by incorporating the concept discussed in [R. Tanaka et al., Comput. Phys. Commun. 12
Externí odkaz:
http://arxiv.org/abs/math/0110111