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RISReview of Fluid Mechanics Solutions by James A. Liggett and David A. Caughey
Publisher: American Society of Civil Engineers
Reynolds Stress and Bed Shear in Nonuniform Unsteady Open-Channel Flow
Publisher: American Society of Civil Engineers
Abstract: Expressions for the Reynolds stress and bed shear stress are developed for nonuniform unsteady flow in open channels with streamwise sloping beds, assuming universal (logarithmic) velocity distribution law and using the ...
Pipe Burst Detection, Localization, and Quantification Using the Transient Pressure Damping Method
Publisher: ASCE
Abstract: The purpose of this paper is to present a technique for burst detection, localization, and cross-sectional area quantification based on the damping of fluid transients. The Fourier components of the transient signal are ...
Identifying Head Accumulation due to Transient Wave Superposition in Pipelines
Publisher: ASCE
Abstract: Fluctuations in pressures are part of the normal behavior of water distribution systems. The common perception is that transient events dissipate quickly in a network without significant consequences; however, under certain ...
Elastic Water Column Model for Hydraulic Transient Analysis of Pipe Networks
Publisher: ASCE
Abstract: The transient behavior of pipe systems is typically simulated using water hammer models [such as the method of characteristics (MOC)], or rigid water column (RWC) models depending on whether the hydraulic transition is ...
Extension of the 1D Unsteady Friction Model for Rapidly Accelerating and Decelerating Turbulent Pipe Flows
Publisher: ASCE
Abstract: This work aims to examine the flow dynamics that contribute to the transient wall shear stress τw(t) of accelerating and decelerating turbulent pipe flows, using a series of direct numerical simulations (DNSs) of accelerating ...
Optimization of Pump Operation Using Rule-Based Controls in EPANET2: New ETTAR Toolkit and Correction of Energy Computation
Publisher: American Society of Civil Engineers
Abstract: The optimization of pump operations has the potential to reduce operational costs, while still maintaining the high level of reliability required of water distribution systems. The hydraulic software EPANET2 toolkit has ...
Behavior of Short Lateral Dead Ends on Pipeline Transients: A Lumped Parameter Model and an Analytical Solution
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: By integrating the continuity equation over a short lateral dead end, the effects of a short lateral dead end side branch on pipeline fluid transients can be lumped into a node. The analytical ...
Detection and Location of a Partial Blockage in a Pipeline Using Damping of Fluid Transients
Publisher: American Society of Civil Engineers
Abstract: The effects of a partial blockage on pipeline transients are investigated analytically. A partial blockage is simulated using an orifice equation, and the influence of the blockage on the unsteady pipe flow is considered ...
Leak Detection and Calibration Using Transients and Genetic Algorithms
Publisher: American Society of Civil Engineers
Abstract: Leak detection and calibration of pipe internal roughnesses in a water distribution network are significant issues for water authorities around the world. Computer simulation of water distribution systems to determine the ...