The Effective Shear Rate for Pipeline Transporting Viscoplastic Fluid
The performance curve of pump reveals the relationship between the pressure and the flow rate,yet the constitutive equation of fluid reveals the relationship between the shear stress and the shear rate.So it is important to investigate the relationship between the effective shear rate and the flow rate in pipeline.For pipeline transporting viscoplastic fluid,a zone without shear rate may exist in the pipe center,and that will make the relationship between the effective shear rate and the flow rate obviously different from pipeline transporting fluid without yield stress.Based on the analysis of laminar flow of viscoplastic fluid in pipeline,an implicit equation to reveal the relationship between the effective shear rate and the flow rate was derived,by which numerical simulation and analysis for pipe flow of different types of viscoplastic fluids in different conditions were carried out.For pipeline transporting viscoplastic fluids under a constant flow rate,the effective shear rate increases with the increase of the yield stress of fluid,and decrease with the increase of the consistency and the rheological index of fluid and the inside diameter of pipeline.For pipeline transporting viscoplastic fluids with thixotropy nature,the effective shear rate will also decrease with time,yet tend to stable.
Shear Rate Pipeline Flow Flow Rate Viscoplastic Fluid Gelled Crude Oil
Wentao Xiao Guozhong Zhang Gang Liu Dawei Zhou
Doctor, College of Pipeline and Civil Engineering, China University of Petroleum, Changjiang west ro Professor, College of Pipeline and Civil Engineering, China University of Petroleum, Changjiang west Assistant Engineer, Tianjin Design Institute, China Petroleum Pipeline Bureau, Tianjin, 300457
国际会议
北京
英文
512-520
2012-10-14（万方平台首次上网日期，不代表论文的发表时间）