Near wall studies of pulp suspension flow using PIV

被引：6
作者：
Fock, Helena [1 ]
Rasmuson, Anders [1 ]
机构：
[1] Chalmers Univ Technol, Dept Chem & Biol Engn, SE-41296 Gothenburg, Sweden
来源：
NORDIC PULP & PAPER RESEARCH JOURNAL | 2008年 / 23卷 / 01期
关键词：
boundary layer; pulp; velocity profile; concentration profile; PIV;
D O I：
10.3183/npprj-2008-23-01-p120-125
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
In this study 2D PIV (Particle Image Velocimetry) is used to investigate the near wall region in pipe flow of pulp suspensions up to a concentration of 2.7% by weight. The axial mean velocity profiles show a distinct plug region which increases when the flow rate is decreased or the bulk concentration is increased. An attempt is also made to couple the light intensity in the images acquired to a concentration gradient of fibres close to the wall of the pipe. The light intensity in the images definitely indicates the existence of such a gradient in the near wall region.
引用
收藏
页码：120 / 125
页数：6
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