Computer Simulation of Agglomeration by a Two-dimensional Random Addition Model. III. -Agglomeration Kinetics and Micromeritic Properties of Closely-packed Agglomerates of Heterogeneous Binary Circles-
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概要
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Computer simulation of closely packed agglomeration of heterogeneous binary circles on a two-dimensional plane was conducted by the use of a random addition model to investigate the mechanism of agglomeration of dispersed particles in a liquid suspension. Under centripetal force, a new coarse or fine circle approached a coarse circle placed on the origin from a random direction. The production of approaching circles was regulated by the probability coefficient of collision (P_c), defined as n_f/n_<f0>. The diameter of agglomerate (D_m) was defined as the square root of the area of the 360-gon inscribed in the periphery of the agglomerate. The growth rate of agglomerate was described by equation (3) in the text. log D_m=C_3 log t+C_4 (λ) (3) The constant C_3 reached a maximum at 50 to 60% coarse circle fraction in the agglomerate. The value of D_m (=10^<C_4 (λ) > at t=1) increased with increasing coarse circle fraction and the diameter ratio of circles in the agglomerate. The kinetics of agglomeration simulated by the present model followed the first-order rate equation (5) in the text. [numerical formula] The porosity of the agglomerate reached a maximum at 50-60% coarse circle fraction in the agglomerate. The coordination number of the agglomerate increased with increasing coarse circle fraction in the agglomerate. This finding was explained by the fact that the coordination number of coarse circles was larger than that of fine circles in the agglomerate.
- 公益社団法人日本薬学会の論文
- 1982-12-25
著者
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川島 嘉明
Gifu Pharmaceutical University
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竹中 英雄
Gifu College of Pharmacy
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砂田 久一
Faculty Of Pharmacy Meijo University
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大塚 昭信
Faculty Of Pharmacy Meijo University
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芥子川 武利
Gifu College of Pharmacy
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