Influence of temperature on transient flow with cavitation in copper pipe-rig

Saidani, Amir; Fourar, Ali; Massouh, Fawaz

doi:10.1007/s40808-021-01240-2

Cited by 4 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The typical experiment setup involved two reservoirs (upstream and downstream), a "non-ori ce" ow, an extended pipe, and valves to investigate when a valve closes swiftly for the case of cavities generation and the case without cavitation with similar result of Joukowsky formula deviation from the experimental results 8 . Through numerical modeling, water temperature in uences the predicted pressure rise caused by the cavitation generation of bubbles [9]. As a result, concerns about the accuracy of the Joukowsky formula must be addressed in a more generic manner to analyze for the normal condition and under cavitation.…”

Section: Introductionmentioning

confidence: 99%

Application of linear impulse momentum theory to the hammering problem

Gahtani

2024

Preprint

View full text Add to dashboard Cite

For many years, researchers have observed and studied the transient hydraulic problem in pipe flow. The influence of water mass on the valve body during fast closing was evaluated using the mass and momentum principle and shocked wave theory. These two physical principles were used to evaluate the pressure rise caused by closing the valve vastly for orifice flow. According to recent studies, the Joukowsky Equation is a well-known formula that approximates orifice tank systems but is up to three times overvalued for pressured systems with two tanks. This created confusion while using this formula for designing valves in pipe flow. This paper presents a formula for the prediction of the pressure rise resulting from fast valve closure based on the well-known impulse momentum principle, which states that the magnitude and duration of the applied force have an impact on the momentum change of a mass object. The impulse-momentum theory is applied here when the fluid mass in the pipe collides with the valve body as it closes rapidly. To demonstrate the concept, this paper provides examples and an experimental program for validation, which is also confirmed by recent experimental programs used in the literature.

show abstract

Section: Introductionmentioning

confidence: 99%

Application of linear impulse momentum theory to the hammering problem

Gahtani

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Neuhaus et al [ 21 ] conducted transient flow experiments at different temperatures and compared the accuracy of simulation results under different tests. Saidani et al [ 22 ] investigated the effect of temperature on a transient cavitation flow. Mousavifard [ 23 ] studied the influence of temperature on turbulence parameters during transient cavitation flows in viscoelastic pipes.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Transient Pressure Damping in Viscoelastic Pipes at Different Water Temperatures

Sun

Zhang

et al. 2022

Materials

View full text Add to dashboard Cite

Water temperature affects the peak pressure damping of transient flows in viscoelastic pipes. Owing to the viscoelastic properties of pipes, the accuracy of peak pressure damping simulations hinges on both viscoelastic and frictional factors. In simulations, the influence of both factors on peak pressure damping at different water temperatures is unclear. In this study, the Kelvin–Voigt model with both a quasi-steady friction model and modified Brunone model was employed. Based on experimental data, the accuracy of simulated peak pressure damping was verified at four different water temperatures (13.8, 25, 31, and 38.5 °C). From the perspective of energy transfer and dissipation, the influence of viscoelastic and frictional factors on peak pressure damping were clarified, and the applicability of different friction models was determined based on the contributions of viscoelastic and frictional factors to peak pressure damping. The numerical results indicate that the viscoelastic properties of pipes have a greater impact on peak pressure damping than their frictional properties at 25, 31, and 38.5 °C. Higher temperatures result in a delay in the rate of work and a decrease in the frequency of work performed by viscoelastic pipes. Viscoelastic properties play a more important role than frictional ones in calculating peak pressure damping as the water temperature increases. In addition, the one-dimensional quasi-steady friction model can accurately simulate peak pressure damping within a specified water temperature range.

show abstract

Energy analysis of transient flow with cavitation by considering the effect of water temperature in viscoelastic pipes

Sun

Wang

et al. 2023

Journal of Hydroinformatics

View full text Add to dashboard Cite

Numerous studies on the pressure fluctuations and cavity volume variations of a transient cavitation flow in viscoelastic pipes are available in the literature. However, the effect of water temperature on the cavity volume and energy conversion has been studied less often. This paper employs the discrete vapor cavity model (DVCM) using quasi-steady friction and quasi-two-dimensional friction models to calculate the cavity volume for different water temperatures and investigates the effects of water temperature on the appearance of the first cavitation at the downstream valve, as well as on the pressure damping in a tank-piping-valve system using an integrated energy analysis approach. The results show that the differences between the pressure and energy variations of the transient cavitation flow simulated using different models were minimal under different water temperature conditions. Moreover, as the water temperature increased, the appearance time of the cavity is postponed, and the volume of the cavity decreases. The energy dissipation increases continuously with an increase in the volume of the cavitation and water temperature in viscoelastic pipes. This study provides valuable insights into the variation pattern of the cavity and the effect of vapor cavities on the rise and decay of the pipeline pressure in different situations.

show abstract

Influence of temperature on transient flow with cavitation in copper pipe-rig

Cited by 4 publications

References 17 publications

Application of linear impulse momentum theory to the hammering problem

Application of linear impulse momentum theory to the hammering problem

Numerical Analysis of Transient Pressure Damping in Viscoelastic Pipes at Different Water Temperatures

Energy analysis of transient flow with cavitation by considering the effect of water temperature in viscoelastic pipes

Contact Info

Product

Resources

About