Calculation of the Concentration Profile in Fine Sand Hydraulic Transport
Type:
Presented during:
WODCON XIX: "Dredging makes the World a better place" - 2010, Beijing, China
Authors:
Zhao Lijuan , Ni Fusheng
Abstract: The concentration profile of sand across a pipeline’s cross-section has a close relationship to the transport mean velocity, flow resistance, etc. It is an important characteristic reflecting the two-phase flow state in the pipeline. Focusing on the frequent fine sand transport, a measuring technique using a radioactive density meter is briefly introduced and the application of the traditional diffusion theory in the circular pipeline is discussed. By using a method dealing with a rectangular pipeline as a reference, a formula to calculate the concentration profile in a circular pipeline is proposed. The result shows that the calculation agrees well with that measured.
Keywords: concentration profile, calculation, pipeline hydraulic transport, fine sand