摘要
为了研究同时存在粗细颗粒的流动阻力,进行了一组专门设计的试验。分析试验资料结果表明:由细的粘土颗粒引起的粘性力与由粗颗粒引起的离散力是可以线性叠加的。离散力是由于粗颗粒相互之间的碰撞,以及粗颗粒与边壁之间的碰撞所造成的。而粘土颗粒的絮凝作用形成絮团和絮网结构,它们对粗颗粒之间的碰撞起到缓冲作用。因而当有细的粘土颗粒存在时,离散力大幅度降低。
A set of specially desinged experiments have been carried for studying the resistance of a flow consisting of water and both fine and coarse particles. The viscous force caused by fine caly particles and the reduced dispersive force are linearly addible. The dispersive force caused by collision of coarse particles reduces to a great degress due to the cushioning effect of the flocculent structures formed by fine particles. The preliminary result is presented in this paper and further study is needed.
出处
《山地研究》
CSCD
1991年第3期153-157,共5页
基金
中国科学院东川泥石流观测研究站基金
关键词
泥石流
阻力
颗粒
粘性力
絮网结构
debris flow, resistance, dispersive force,viscous force,flocculent structure
