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前身誌
48 巻, 5 号
選択された号の論文の5件中1～5を表示しています
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山田 祥徳, 酒井 幹夫, 水谷 慎, 孫 暁松, 野々上 友也, 高橋 公紀2011 年 48 巻 5 号 p. 288-295
発行日: 2011/05/10
公開日: 2011/05/31
ジャーナル フリーIn industrial arena, there are many solid-liquid two phase flow systems like mixing vessels, glass furnaces, solid-liquid separation equipments, etc. Numerical simulations are promising approach to understand the phenomena. Numerical analyses by the Eulerian-Lagrangian approach were performed in the past studies. The Eulerian-Lagrangian methods were applied to various solid-liquid flow systems without the free surfaces. On the other hand, numerical models which can treat the solid-liquid flows involving free surface were hardly developed so far. Hence, in the current study, we develop a Lagrangian-Lagrangian coupling methods to perform the fast simulation of the solid-liquid flows. The liquid phase were modeled by the Explicit Moving Particle Simulation (E-MPS) method. The E-MPS method can simulate the free surface flows easily. The DEM / E-MPS method was applied to a solid-liquid flow in a pipeline. The simulations were performed by changing the acoustic velocity. The simulation results, namely, the solid particle distribution, pressure and fluid velocity were compared in the present study. The DEM / E-MPS method is shown to make possible to perform the fast simulation by assuaging the acoustic velocity.抄録全体を表示PDF形式でダウンロード (890K) -
八久保 鉄平, 中別府 哲也, 深澤 智典, 新戸 浩幸2011 年 48 巻 5 号 p. 296-302
発行日: 2011/05/10
公開日: 2011/05/31
ジャーナル フリーWe have measured the interaction forces between a pair of the hydrophilic or hydrophobized silica surfaces in the anhydrous non-aqueous medium of ethanol, toluene, or cyclohexane and in their moist media. In the case of toluene and cyclohexane, the strong adhesion forces were observed for a pair of the hydrophilic surfaces, whereas negligibly small adhesion forces were found for a pair of the surfaces hydrophobized by silane coupling agents with alkyl chains. The trace amount of water in these solvents enhanced the adhesion forces between the hydrophilic surfaces and between the surfaces hydrophobized by silane of short alkyl chain. The adhesion force between the surfaces hydrophobized by silane of long alkyl chains remained negligibly small even in the moist media. In the case of ethanol, no adhesion force was found between the hydrophilic silica surfaces, whereas the adhesion forces between the hydrophobized surfaces were relatively small.抄録全体を表示PDF形式でダウンロード (822K)
解説
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甲賀 誠2011 年 48 巻 5 号 p. 303-311
発行日: 2011/05/10
公開日: 2016/01/29
ジャーナル 認証ありReforming of solid oxidizers and energetic materials is required to improve and control their burning characteristics. The safe reforming technique is needed. Used as a solid oxidizer of propellants, ammonium perchlorate （AP） can ignite and explode easily by slight impact or friction ; therefore, to prepare fine AP particles by commercial grinding method is difficult. This paper reviews several safe methods of preparing unique AP particles （fine, porous, hollow, needle-like, dendritic, and hexahedral） that are based on thermal decomposition, spray-drying, freeze-drying, and crystal-habit-modification.抄録全体を表示PDF形式でダウンロード (1402K)
解説 フロンティア研究シリーズ
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渡邉 哲2011 年 48 巻 5 号 p. 312-318
発行日: 2011/05/10
公開日: 2016/01/29
ジャーナル 認証ありSignificant progress has been made in techniques of surface patterning over large areas; complex patterns of particles can be formed using predefined templates or soft lithography. Although these approaches are quite effective, the use of template-free self-organization processes becomes necessary to complement them as the required structure sizes become of the order of nanometers. The advantages of a self-organization technique are its simplicity, versatility, cost-effectiveness, and compatibility with heterogeneous integration processes.
In this paper, we present our recent results on the pattern formation of colloidal particles by using a template-free technique based on the self-organization of particles. Our technique can produce various patterns including stripes, dot arrays, grids, and Sierpinski triangles.抄録全体を表示PDF形式でダウンロード (1108K) -
2011 年 48 巻 5 号 p. 335
発行日: 2011/05/10
公開日: 2016/06/08
ジャーナル 認証ありVol.47 No.11 p.779 にて、下記の通り誤りがありました。
（誤）SPMは、大気に浮遊する粒径約7μm以下の粒子で
（正）SPMは、大気に浮遊する粒径約10μm以下の粒子で抄録全体を表示PDF形式でダウンロード (444K)
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