Radial and Axial Variations in Transient Pressure Waves Transmitted Through Liquid Transmission Lines

Mitra, A.K.; Rouleau, W. T.

doi:10.1115/1.3242423

Cited by 26 publications

(18 citation statements)

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“…The intrinsic three dimensionality of turbulence can also be approximated by a Reynolds averaged Navier-Stokes equation (RANS) approach, such as two-equation turbulence models. Along this line, Mitra & Rouleau (1985) built a two-dimensional model for transient pipe flow. Vardy & Hwang (1991) neglected pressure variation in the radial direction and considered a plane wave solution with an algebraic turbulence model.…”

Section: Introductionmentioning

confidence: 99%

“…However, the quasi-two-dimensional model is not able to simulate pipes with partial blockages as the flow field is such that it minimally requires true two-dimensionality with the radial velocity component being taken into account. A possibility for developing such a model is to extend the model of Mitra & Rouleau (1985) to more complicated geometry. Alternatively, a general purpose computational fluid dynamics (CFD) software package may be employed as this class of model is capable of handling complex geometry.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study of the blockage length effect on the transient wave in pipe flows

Zhao

Ghidaoui

Louati

et al. 2018

Journal of Hydraulic Research

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A pipeline with an extended blockage is modelled as a system of three pipes in series. A computational fluid dynamics approach using the ADINA software is adapted to solve the slightly compressible turbulent flow problem with complex geometry. Two-dimensional axisymmetric computational results are validated by several examples. In practice, the water hammer wave generated by rapid valve closure usually exhibits wave front smearing. The numerical analysis shows that for a blockage length larger than the wave front thickness, the magnitude of the incident wave may be significantly suppressed as a result of the interaction between the blockage and the wave front. By reflecting negative pressure waves toward the incident wave before its maximum pressure arrives at the blockage, the maximum transient pressure may be considerably reduced. Consequently, the blockage behaves as a discrete blockage. However, if the blockage length is large compared with the thickness of the wave front, the incident wave conserves its initial amplitude, and the blockage behaves as an extended blockage. Therefore, the occurrences of discrete and extended blockages depend on the thickness of the wave front and thus on the rapidity of the maneuver that generates the transient.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of the blockage length effect on the transient wave in pipe flows

Zhao

Ghidaoui

Louati

et al. 2018

Journal of Hydraulic Research

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“…The variations less unidirectional as stated in (Ghidaoui et al 2005), ``rapid and energy are far greater than their radial counterparts". A study on laminar water-hammer (Mitra and Rouleau 2005) and turbulent water-hammer (Vardy and Hwang 2005) also support the unidirectional approach in the problem formulation. Detailed literature on valve induced transients are available in the books (Wylie 2003, Tijsseling andBergant 2007) and related works are also reported in (Bazargan-Lari et al 2013, Choi et al 2015, Kodura 2016.…”

Section: Ous Valve Closurementioning

confidence: 64%

A Pressure-based Compressible-Liquid Flow Model for Computation of Instantaneous Valve Closure in Pipes

Chandran¹,

Salih²

2019

stj

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A generalized, pressure-based compressible-liquid flow model is proposed for the isothermal low-speed flow of liquids. The flow model incorporates dedicated equations of state for liquids into the pressure-based solvers to simulate the compressible effects in liquids. The model’s capability to handle compressible liquid flow problems is evaluated against the well-established density-based water-hammer model. The isothermal flow problem of an instantaneous valve closure in an irrigation pipe and the associated flow transients are numerically solved using the proposed model by employing the Tait equation of state in conjunction with a segregated pressure-based solver algorithm. The transient flow problem is solved for a range of operating pressures, and the surge in pressure and variation of other flow properties and their interrelations are studied in detail. The proposed model could successfully capture the entire physics of the problem, including the compressible modeling of the liquid involved and could produce high accuracy numerical results. The results suggest that the pressure-based compressible-liquid flow model is a reliable and computationally inexpensive numerical tool for isothermal low-speed compressible liquid flow computations.

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“…Numerical solutions based on the method of characteristics were applicable to the modified wave attenuation, as shown by Wylie and Streeter [11]. Mitra and Rouleau [38] developed a numerical method for fluid transients in rigid pipes, based on implicit factorization. Stuckenbruck et al [39] gave numerical results of an improved analysis of wave speed.…”

Section: Introductionmentioning

confidence: 99%

Propagation of Measurement-While-Drilling Mud Pulse during High Temperature Deep Well Drilling Operations

Meng

Gao

et al. 2013

Mathematical Problems in Engineering

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Signal attenuates while Measurement-While-Drilling (MWD) mud pulse is transmited in drill string during high temperature deep well drilling. In this work, an analytical model for the propagation of mud pulse was presented. The model consists of continuity, momentum, and state equations with analytical solutions based on the linear perturbation analysis. The model can predict the wave speed and attenuation coefficient of mud pulse. The calculated results were compared with the experimental data showing a good agreement. Effects of the angular frequency, static velocity, mud viscosity, and mud density behavior on speed and attenuation coefficients were included in this paper. Simulated results indicate that the effects of angular frequency, static velocity, and mud viscosity are important, and lower frequency, viscosity, and static velocity benefit the transmission of mud pulse. Influenced by density behavior, the speed and attenuation coefficients in drill string are seen to have different values with respect to well depth. For different circulation times, the profiles of speed and attenuation coefficients behave distinctly different especially in lower section. In general, the effects of variables above on speed are seen to be small in comparison.

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Radial and Axial Variations in Transient Pressure Waves Transmitted Through Liquid Transmission Lines

Cited by 26 publications

References 0 publications

Numerical study of the blockage length effect on the transient wave in pipe flows

Numerical study of the blockage length effect on the transient wave in pipe flows

A Pressure-based Compressible-Liquid Flow Model for Computation of Instantaneous Valve Closure in Pipes

Propagation of Measurement-While-Drilling Mud Pulse during High Temperature Deep Well Drilling Operations

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