LIMITING BEHAVIOR OF TRANSVERSE TURBULENT VELOCITY FLUCTUATIONS CLOSE TO A WALL

被引:23
作者
SIRKAR, KK
HANRATTY, TJ
机构
[1] Department of Chemistry and Chemical Engineering, University of Illinois, Urbana
来源
INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS | 1969年 / 8卷 / 02期
关键词
D O I
10.1021/i160030a002
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In previous studies of turbulent flow in a pipe the component of the fluctuating velocity gradient at the wall in the direction of mean flow has been measured by determining the limiting current to a small rectangular polarized electrode mounted flush with the wall and oriented perpendicular to the flow. By measuring the limiting current at an electrode at 12 to 20° as well as at 90° the root-mean-squared value of the component in the transverse direction has been estimated to be about 0.087 of the time-averaged velocity gradient at the wall. This is in agreement with recent photographic measurements of solid particles close to a wall made by Fowles. These results suggest that the limiting behavior of the eddy diffusion coefficient close to a wall is such that ∊ → y3 as y → 0, unless fluctuations in the mass transfer rate are uncorrelated with fluctuations in the gradient of the transverse velocity component. © 1969, American Chemical Society. All rights reserved.
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页码:189 / &
相关论文
共 8 条
[1]  
FOWLES PE, 1966, THESIS MASSACHUSETTS
[2]  
Hinze J. O., 1959, TURBULENCE
[3]  
HUMMEL R, 1967, CHEM ENG SCI, V22, P21
[4]   STRUCTURE OF TURBULENT BOUNDARY LAYERS [J].
KLINE, SJ ;
REYNOLDS, WC ;
SCHRAUB, FA ;
RUNSTADLER, PW .
JOURNAL OF FLUID MECHANICS, 1967, 30 :741-+
[5]  
LAUFER J, 1954, NACA1174 REP
[6]   A STUDY OF TURBULENCE AT A WALL USING AN ELECTROCHEMICAL WALL SHEAR-STRESS METER [J].
MITCHELL, JE ;
HANRATTY, TJ .
JOURNAL OF FLUID MECHANICS, 1966, 26 :199-&
[7]   LIMITING RELATION FOR EDDY DIFFUSIVITY CLOSE TO A WALL [J].
SON, JS ;
HANRATTY, TJ .
AICHE JOURNAL, 1967, 13 (04) :689-&
[8]  
WENZEL HG, 1968, 13 U ILL WAT RES CEN