FLUID FORCES ON SHORT-SPINED SEA-URCHIN AND NORTHERN SEA-URCHIN

被引：0

作者：

YAMASAKI, S ^{[1
]}

NASHIMOTO, K ^{[1
]}

YAMAMOTO, K ^{[1
]}

HIRAISHI, T ^{[1
]}

机构：

[1] HOKKAIDO UNIV,FAC FISHERIES,HAKODATE,HOKKAIDO 041,JAPAN

来源：

NIPPON SUISAN GAKKAISHI | 1993年 / 59卷 / 07期

关键词：

D O I：

暂无

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The drag coefficients and the added mass coefficients of short-spined sea urchin Strongylocentrotus intermedius and northern sea urchin Strongylocentrotus nudus were determind. Meanwhile adhesive forces exerted by the tube feet were also measured. The drag forces were measured in steady flow and the added masses were measured by torsion pendulum coating the sea urchins with paint. The drag coefficient C(d) was greater for the northern sea urchin, while the added mass coefficient C(a) was greater for the short-spined sea urchin. The average values of C(d), C(a) in the direction of the test diameter was 0.66, 0.64 for the short-spined sea urchin and 1.06, 0.34 for the northern sea urchin respectively. Adhesive forces on smooth glass substrates were 0.3 approximately 2.8 kg for the short-spined sea urchin and 0.2 approximately 2.4 kg for the northern sea urchin when they were more than 40 mm in test diameter. The adhesive forces of both species were much larger than the calculated maximum wave forces using determined C(d), C(a) on the same size of sea urchin in an estimated rough sea condition.

引用

页码：1139 / 1146

页数：8