NDLI: A Universal Semi-Analytic Model for Axial Mixing in a Straight Pipe

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Luo, Heng Li, Yun Wang, Hai
Copyright Year	2014
Abstract	The industrial applications of common pipelines to simultaneously deliver multiple types of gases or liquids widely occur in petroleum and natural gas industries. Therein, the pipelines compose of significant horizontal and vertical sections can range from several meters to several km in length. The longitudinal dispersion of matter is an important aspect of such flows in safety and reliability. This paper sets out an analytic simulation model on the basis of the profiles of velocity and turbulent viscosity via steady numerical solutions by computational fluid dynamics (CFD) method. The mixing length and the wasting lengths of the original and latter fluids were applied as the key parameter to describe the extent of axial mixing in the pipe. In both turbulent and laminar pipe flows, the relative errors in the present model were reduced to 5% or less, which is 5%–15% lower than those in previous models. Moreover, the accuracy of the present model was nearly not less than that of unsteady numerical solutions in the same meshing density, whereas the computational load of the present model was far less than that of unsteady numerical solutions. Further, through investigating effects of buoyancy on axial mixing, it is found that the wasting length of the lighter fluid was higher than that of the heavier fluid.
File Format	PDF
ISBN	9780791849545
DOI	10.1115/IMECE2014-37351
Volume Number	Volume 7: Fluids Engineering Systems and Technologies
Conference Proceedings	ASME 2014 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2014-11-14
Publisher Place	Montreal, Quebec, Canada
Access Restriction	Subscribed
Subject Keyword	Viscosity Turbulence Computational fluid dynamics Pipe flow Simulation models Pipelines Buoyancy Gas industry Density Flow (dynamics) Petroleum Stress Errors Gases Fluids Safety Reliability Pipes Flammable liquids
Content Type	Text
Resource Type	Article

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