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一、问题的提出 在研究高含沙水流运动规律时,其流变特性显得越来越重要.一般说来,高浓度泥浆呈非牛顿体特性,可近似地用宾汉模型来描述. 近几年,国内泥沙界普遍采用毛细管粘度计(见图1)测定流变参数.从目前各家所推荐的流变参数计算公式来看,计算的刚度系数值比较接近,相差不大;而计算的宾汉切应力相差很远,有的可差到3～5倍.鉴于宾汉切应力是一个非常重要的参数,就
First, the problem raised In studying the law of movement of high sediment flow, its rheological properties are more and more important.In general, the high concentration of mud was non-Newtonian characteristics can be approximated by the Bingham model to describe the recent In year, the domestic sediment community commonly used capillary viscometer (see Figure 1) to determine the rheological parameters.At present, the recommended rheological parameters of each formula point of view, the calculation of the stiffness coefficient values are relatively close, the difference is not; and calculation Bingham shear stresses vary widely, and some can be poor to 3 to 5 times.Because Bingham shear stress is a very important parameter, it is