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RISTransient Test-Based Technique for Leak Detection in Outfall Pipes
Publisher: American Society of Civil Engineers
Abstract: A technique is proposed for leak detection and evaluation in outfall pipes based on properties of transient pressure waves. Transients are caused by an increase of the piezometric head at the initial section of the outfall ...
Automatic Control Valve–Induced Transients in Operative Pipe System
Publisher: American Society of Civil Engineers
Abstract: In most cases, the final configuration of complex pipe networks is attained simply by connecting subsystems initially designed to work separately. Thus, automatic control valves (ACV) are often installed in the confluence ...
Wave Kinematics at Steep Slopes: Second-Order Model
Publisher: American Society of Civil Engineers
Abstract: This paper presents an experimental study investigating the relevant characteristics of the flow field induced by a regular wave acting on a uniform steep slope. Due to their uniqueness, the experimental data are of paramount ...
Relevance of Pipe Period on Kelvin-Voigt Viscoelastic Parameters: 1D and 2D Inverse Transient Analysis
Publisher: American Society of Civil Engineers
Effects of Two-Dimensionality on Pipe Transients Modeling
Publisher: American Society of Civil Engineers
Abstract: The paper discusses the rapid damping of pressure peaks in a water-hammer phenomenon after the end of a complete valve-closure maneuver. This effect is due to flow characteristics not considered when one-dimensional models ...
Improvement of the Carrying Capacity of Cast Iron Pipes Due to the Coating Lapping Process
Publisher: ASCE
Abstract: This paper presents the results of the tests executed at the Water Engineering Laboratory (WEL) of the University of Perugia for evaluating the performance of cast iron pipes with the cement mortar coating refined by a ...
Transient Energy Analysis in Water-Filled Viscoelastic Pipelines
Publisher: ASCE
Abstract: The transient flow phenomenon in a pipeline accounts for the flow variations with time and space. The transient energy analysis (TEA) overlooks the process as it sums the energy of the entire pipe domain and reports it at ...
Decay of Pressure and Energy Dissipation in Laminar Transient Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present paper, some peculiar characteristics of transient laminar flow are discussed. After presenting a review of the existing literature, attention is focused on transient energy dissipation ...
Local and Integral Energy-Based Evaluation for the Unsteady Friction Relevance in Transient Pipe Flows
Publisher: American Society of Civil Engineers
Abstract: Unsteady friction and its modeling have been widely studied in transient pipe flows for its influences and modification effect on pressure waves. Such a feature is of great importance particularly in pipe systems where the ...
CFD and 1D Approaches for the Unsteady Friction Analysis of Low Reynolds Number Turbulent Flows
Publisher: American Society of Civil Engineers
Abstract: The aim of this paper is to investigate the complex nature of the transient energy dissipation by using a computational fluid dynamics (CFD) model with a high spatial and temporal resolution together with one-dimensional ...