Russian Journal of Electrochemistry ( IF 1.1 ) Pub Date : 2019-11-15 , DOI: 10.1134/s1023193519100069 John Newman
Abstract
An attempt is made to resolve a long standing difference in the predicted distribution of the eddy diffusivity in the viscous sublayer, where the literature shows a dependence on either the cube or the fourth power of the distance from a solid wall. The resolution suggested is that a y3 dependence prevails very close to the wall while a y4 dependence may prevail in the outer part of the viscous sublayer near the border with the outer turbulent flow. However, at high values of the Schmidt number, the overall mass-transfer rate will show behavior corresponding to the y3 dependence, and any hints of the y4 dependence would be very hard to observe experimentally.
中文翻译:
粘性子层中的涡流扩散率
抽象的
试图解决粘性子层中涡流扩散率的预测分布中的长期差异,其中文献显示了与实心壁距离的三次方或四次方的依赖性。建议的分辨率是,y 3依赖性在非常靠近壁的位置占主导,而y 4依赖性可能在粘性子层的外部(靠近外部湍流边界)附近占主导地位。但是,在高施密特数的情况下,整体传质速率将表现出与y 3依赖性相对应的行为,并且任何y 4依赖性的暗示都很难通过实验观察到。