1972 年 92 巻 1 号 p. 59-63
In continuation of the previous work on the effect of polydispersibility on the sedimentation volume of globular particles of contact-coagulability and attraction-coagulability, the effect of polydispersibility on the sedimentation volume on non-attracting particles was examined. There is no attraction between such particles but they do undergo coagulation at a certain probability when the particles come into contact. It was thereby found that when the particle size is not too different, the particles form a sediment layer same as in the case of monodispersible particles so that there is no great change in their sedimentation volume. When the mixture contains particles of different size, small particles enter into spaces left by large particles so that the sedimentation volume as a whole becomes smaller. This tendency was found to become greater as the difference in the size of particles became greater and adhesion probability became smaller, and when the number of smaller particles became greater.