固液混相聞水路流れの水理特性に関する研究 (4)

Abstract

One of the most interesting and complicated problems in fluvial hydraulics is the effect ofsuspended sediment on flow properties. Although some theoretical and experimental researcheson the mechanism of interaction between solid particles and fluid have been carried out, many un-certain characteristics of flow remain to be clarified. This paper deals with the velocity distributionof free surface shear flow with suspended sand particles and the effect of secondary flow on the velocityand concentration distributions.Main results obtained by the experimental investigation are as follows; 1) Velocity distributionof flows with and without suspended sand particles, under the uniform and steady condition, agreesto Coles's velocity distribution equation which takes account of the deviation from log-law. 2) Someparameters which are contained in Coles's equation vary according to the concentration of suspendedsediment. 3) Rouse's equation agrees very well to the concentration distribution even when second-ary flow exists in the flow.