CONCENTRATION GRADIENT FORMATION IN SUPERSATURATED VERTICAL COLUMNS .1. FOKKER-PLANCK APPROXIMATION

被引：4

作者：

IZMAILOV, AF ^{[1
]}

MYERSON, AS ^{[1
]}

机构：

[1] POLYTECH INST NEW YORK,DEPT CHEM ENGN,333 JAY ST,BROOKLYN,NY 11201

来源：

JOURNAL OF CRYSTAL GROWTH | 1992年 / 121卷 / 04期

关键词：

D O I：

10.1016/0022-0248(92)90579-8

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The formation of concentration gradients in vertical columns of supersaturated binary solutions is investigated theoretically for the case when the only driving force is time-independent gravity. The linear Fokker-Planck formalism is used in order to obtain estimations of the sedimentation time. It is shown that for aqueous supersaturated solutions the times obtained theoretically are much greater than the times observed experimentally. Thus, it is shown that the gravitational field is not responsible for the rapid formation of the concentration gradient but maintains the gradient after it has formed.

引用

页码：723 / 732

页数：10

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