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Akira Kayano

Bio: Akira Kayano is an academic researcher from Kogakuin University. The author has contributed to research in topics: Drop (liquid) & Ligament. The author has an hindex of 4, co-authored 5 publications receiving 56 citations.

Papers
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TL;DR: In this paper, the authors obtained an equation for maximum drop diameter as a result of atomization experiments on film type disintegration of aqueous millet jelly solution by a rotating disk.
Abstract: The following equation was obtained for maximum drop diameter as a result of atomization experiments on film type disintegration of aqueous millet jelly solution by a rotating disk. dmax/r0=1.1We-3(ρQ2/σT03)0.15(Q/υr0)-0.15 This result was studied on the basis of film extension and thickness of liquid film at the leading edge of the film. The thickness of the liquid film at the leading edge of the film can be approximated by a simple relation. This relation supports the appropriateness of the results of the atomization experiment. Thickness of liquid film and maximum drcp diameter are proportional.

20 citations

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TL;DR: In this article, the correlation of the pitch of ligaments and drop size was studied and it was shown that the drop diameter which gives the highest numeral frequency of the main drops is proportional to pitch of the ligaments.
Abstract: The correlation of the pitch of ligaments and drop size was studied. We can hardly state the definite relation between the pitch of ligaments and the mean drop size from generating satellite drops, but know that the drop diameter which gives the highest numeral frequency of the main drops is proportional to pitch of ligaments.

10 citations

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TL;DR: In this article, the authors describe a scenario in which a vehicle is traveling in a convoy of vehicles, and the vehicle is equipped with a generator.W-1D-0.5Q1/3.
Abstract: 回転円板上で液膜が分裂しヒモ状の流れを発生する現象を実験ならびに理論により研究し, この理論を, 円板周端のヒモ状分裂にあてはめた。その結果, 大山らの粒径に関する実験結果と比較的よく一致する粒係dv∝w-1D-0.5Q1/3を得た。

9 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, ultrasonic energy was used to uniformly disperse multiwalled carbon nanotubes (MWNTs) in solutions and to incorporate them into composites without chemical pretreatment.
Abstract: The aim of this article was to elucidate the basic relationships between processing conditions and the mechanical and electrical properties of multiwalled carbon nanotube reinforced polymer composites. In conventional chopped fiber reinforced polymer composites, uniform distributions of fibers throughout the matrix are critical to producing materials with superior physical properties. Previous methods have dispersed carbon nanotubes by aggressive chemical modification of the nanotubes or by the use of a surfactant prior to dispersion. 1, 2 Here, ultrasonic energy was used to uniformly disperse multiwalled nanotubes (MWNTs) in solutions and to incorporate them into composites without chemical pretreatment. Polystyrene (PS) solutions containing MWNTs were cast and spun to yield thin film MWNT composites. The rheology of PS/MWNT suspensions was modeled using the Carreau equation. MWNTs were found to align at the shear rates generated by the spin casting process. The tensile modulus and strain to failure of samples compared well to classical micromechanical models, increasing with MWNT loading. The composite films showed lower strains at the yield stress than neat PS films. The presence of MWNTs at 2.5 vol % fraction approximately doubles the tensile modulus, and transforms the film from insulating to conductive (surface resistivity, ρ, approaching 103 Ω/□). © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 2660–2669, 2002

547 citations

Journal ArticleDOI
TL;DR: In this paper, the process of spin coating is described, with particular attention to applications in microelectronics, and the physical mechanisms involved in the process are discussed and those mechanisms that affect the final state are identified, viz., centrifugal and viscous forces, solute diffusion, and solvent evaporation.
Abstract: The process of spin coating is described, with particular attention to applications in microelectronics. The physical mechanisms involved in the process are discussed and those mechanisms that affect the final state are identified, viz., centrifugal and viscous forces, solute diffusion, and solvent evaporation: A model is proposed that incorporates only the latter mechanisms, with viscosity and diffusivity depending on solute concentration. The evaporation of solvent during spinning causes the solution viscosity to increase and the flow is reduced. The thickness of the final solid film is related to the thickness of a diffusion boundary layer near the free surface. The model predicts the final dry film thickness in terms of the primary process variables, spin speed, and initial polymer concentration. A similarity boundary‐layer analysis leads to a simple approximate result for the final film thickness that is consistent with limited experimental data, hf ∼KC0(ν0D0)1/4/Ω1/2, where K is a number of order un...

317 citations

Journal ArticleDOI
TL;DR: The varied immobilization methodologies, including adsorption, entrapment, covalent binding, and microencapsulation, are summarized to provide examples of interest to the food industry and the scale-up potential of the various immobilization techniques.
Abstract: Immobilization of cells offers advantages to the food process industries, including enhanced fermentation productivity and cell stability and reduced downstream processing costs due to facilitated cell recovery and recycle. This article summarizes the varied immobilization methodologies, including adsorption, entrapment, covalent binding, and microencapsulation. Examples of interest to the food industry are provided, together with a review of the physiological effects of immobilization. Topics in process engineering include immobilized cell bioreactor configurations and the scale-up potential of the various immobilization techniques.

180 citations

Journal ArticleDOI
TL;DR: A rotary atomizer can produce sprays with narrow ranges of drop size either by forming drops directly at its edge, or by the disintegration of liquid ligaments formed from the edge as discussed by the authors.

102 citations

Journal ArticleDOI
TL;DR: In this paper, the boundary-layer flow due to a rotating disk is considered for a number of generalised Newtonian fluid models, and the flow inside the 3D boundary layer is determined via a similarity solution.
Abstract: The boundary-layer flow due to a rotating disk is considered for a number of generalised Newtonian fluid models. In the limit of large Reynolds number the flow inside the three-dimensional boundary-layer is determined via a similarity solution. Results for power-law and Bingham plastic fluids agree with previous investigations. We present solutions for fluids that adhere to the Carreau viscosity model. It is well known that unlike the power-law and Bingham models the Carreau model is applicable for vanishingly small, and infinitely large shear rates, as such we suggest these results provide a more accurate description of non-Newtonian rotating disk flow.

97 citations