DRAG REDUCTION BY CULTURE SOLUTIONS OF DRY MALTED RICE

被引:0
作者
Watanabe, Keizo [1 ]
Ogata, Satoshi [1 ]
机构
[1] Tokyo Univ Agr & Technol, Koganei, Tokyo, Japan
来源
IMECE 2009: PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 9, PTS A-C | 2010年
关键词
D O I
暂无
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Turbulent drag reduction by culture solutions of dry malted rice was investigated in a 2.00mm-inner- diameter pipe flow of length 50 diameters at Reynolds numbers from 500 to 8000. The drag reducing abilities of the solutions were tested by comparing drag reduction effectiveness at different concentrations and culture times in water. Comparisons between polysaccharide biopolymer solutions and culture solutions of dry malted rice revealed that the test solutions exhibited Type B drag reduction, which were roughly parallel to, but displaced upwards from, the Newtonian Prandtl-Karman law. The maximum drag reduction ration was about 30% at a Reynolds number of 8,000. It is shown also that the onset point of drag reduction phenomena was Re root f=200
引用
收藏
页码:75 / 79
页数:5
相关论文
共 8 条
[1]  
BERMAN NS, 1985, P IUTAM S ESS GERM, P293
[2]  
Gasljevic K., 2005, P 2 INT S SEAW DRAG, P559
[3]   DRAG REDUCTION IN POLYSACCHARIDE SOLUTIONS [J].
HOYT, JW .
TRENDS IN BIOTECHNOLOGY, 1985, 3 (01) :17-21
[4]   RHEOLOGICALLY INTERESTING POLYSACCHARIDES FROM YEASTS [J].
PETERSEN, GR ;
NELSON, GA ;
CATHEY, CA ;
FULLER, GG .
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY, 1989, 20-1 :845-867
[5]   DRAG REDUCING PROPERTIES OF MICROALGAL EXOPOLYMERS [J].
RAMUS, J ;
KENNEY, BE ;
SHAUGHNESSY, EJ .
BIOTECHNOLOGY AND BIOENGINEERING, 1989, 33 (05) :550-557
[6]  
Toms B. A., 1948, P 1 INT C RHEOL, VII, P135, DOI DOI 10.1155/2011/367042
[7]  
Virk P., 2005, P 2 INT S SEAW DRAG, P545
[8]   ULTIMATE ASYMPTOTE AND MEAN FLOW STRUCTURE IN TOMS PHENOMENON [J].
VIRK, PS ;
MICKLEY, HS ;
SMITH, KA .
JOURNAL OF APPLIED MECHANICS, 1970, 37 (02) :488-+