- 著者
- SAITO Izumi GOTOH Toshiyuki WATANABE Takeshi
- 出版者
- Meteorological Society of Japan
- 雑誌
- 気象集誌. 第2輯 (ISSN:00261165)
- 巻号頁・発行日
- pp.2019-049, (Released:2019-05-17)
- 被引用文献数
- 17
To consider the growth of cloud droplets by condensation in turbulence, the Fokker-Planck equation is derived for the droplet size distribution (droplet spectrum). This is an extension of the statistical theory proposed by Chandrakar and coauthors in 2016 for explaining the broadening of the droplet spectrum obtained from the ‘Π-chamber', a laboratory cloud chamber. In this Fokker-Planck equation, the diffusion term represents the broadening effect of the supersaturation fluctuation on the droplet spectrum. The aerosol (curvature and solute) effects are introduced into the Fokker-Planck equation as the zero flux boundary condition at R2=0, where R is the droplet radius, which is mathematically equivalent to the case of Brownian motion in the presence of a wall. The analytical expression for the droplet spectrum in the steady state is obtained and shown to be proportional to Rexp(-cR2), where c is a constant. We conduct direct numerical simulations of cloud droplets in turbulence and show that the results agree closely with the theoretical predictions and, when the computational domain is large enough to be comparable to the Π-chamber, agree with the results from the Π-chamber as well. We also show that the diffusion coefficient in the Fokker-Planck equation should be expressed in terms of the Lagrangian autocorrelation time of the supersaturation fluctuation in turbulent flow.
- 著者
- Otsuka Atsushi Nakajima Saeko Kubo Masato Egawa Gyohei Honda Tetsuya Kitoh Akihiko Nomura Takashi Hanakawa Sho Sagita Moniaga Catharina Kim Bongju Matsuoka Satoshi Watanabe Takeshi Miyachi Yoshiki Kabashima Kenji
- 出版者
- Nature Publishing Group
- 雑誌
- Nature Communications (ISSN:20411723)
- 巻号頁・発行日
- vol.4, 2013-04-23
- 被引用文献数
- 93
ハプテンやペプチド抗原に対するTh2誘導に好塩基球が必須である. 京都大学プレスリリース. 2013-04-24.
- 著者
- Mashimo Tomoji Takizawa Akiko Kobayashi Junya Kunihiro Yayoi Yoshimi Kazuto Ishida Saeko Tanabe Koji Yanagi Ami Tachibana Asato Hirose Jun Yomoda Jun-Ichiro Morimoto Shiho Kuramoto Takashi Voigt Birger Watanabe Takeshi Hiai Hiroshi Tateno Chise Komatsu Kenshi Serikawa Tadao
- 出版者
- Elsevier
- 雑誌
- Cell reports (ISSN:22111247)
- 巻号頁・発行日
- vol.2, no.3, pp.685-694, 2012-09-27
- 被引用文献数
- 61
重症免疫不全SCIDラットの作製 : ヒトiPS細胞、がん細胞、肝細胞をラット体内で培養することに成功. 京都大学プレスリリース. 2012-09-14.