A modified equation of state for water for a wide range of pressure and the concept of water shock tube

R, Jishnu Chandran; Salih, A.

doi:10.1016/j.fluid.2018.11.032

Cited by 21 publications

(10 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A large µ av guarantees the elimination of numerical oscillations but slows down the rising edge of the shock front, while a small value reduces the solution speed and keeps the unphysical oscillations near the shock front. In addition to the Tait equation, other equations of state for water [106,107] can also be used in the modelling of SW processes, while the nondimensionalization of equation ( 20) should be redone accordingly. Following the procedure in [104], a coordinate transformation is carried out to fix the left boundary of the solution domain on the EP-water boundary.…”

Section: The Water Submodelmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The underwater electrical wire explosion (UEWE) is an appealing source of underwater shock waves (SWs) with a high conversion efficiency from electrical energy to mechanical energy, good repeatability and controllability. Industrial applications are already seen in oil-well unblocking and stratum stimulation, and research is currently underway to apply UEWEs in electro-hydraulic forming, exploitation of unconventional gas and oil resources, etc. The emerging new applications call for a review on UEWE research from the perspective of an efficient SW source. This review paper considers the physical processes and numerical simulation methods, electrical and SW characteristics, and current and potential applications, and provides suggestions for future research directions. The code (XJ_UEWE01) developed by the authors to solve a coupling model of UEWE is included. The paper will provide students and researchers new to this field with an explanation of basic concepts of UEWE and a detailed overview of previous studies, and will aid research on UEWE applications, especially device development and parameter optimization.

show abstract

Section: The Water Submodelmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Air is described with

and

, and

unless stated otherwise. Water has the properties

and

[20] for the NASG EOS and

and

for the Tait EOS. In all cases, the reference pressure is

.…”

Section: Resultsmentioning

confidence: 99%

The Gilmore-NASG model to predict single-bubble cavitation in compressible liquids

Denner

2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

“…The EOS relates the fluid density and signal wave speed to its pressure. The specific EOS we have used is the Modified Noble-Abel Stiffened Gas equation of state (Modified NASG EOS) [14], which is a highly accurate non-isothermal EOS for liquid water. The work also presents a variable friction coefficient, defined in the form of a tunable function of local pressure, to improve the accuracy of the numerical solver.…”

Section: Methodsmentioning

confidence: 99%

“…In the present study, water is modeled as a compressible liquid as it is subject to high pressures both at operating and surge conditions. The density of liquid water is estimated using the modified NASG equation of state (EOS) proposed in [14]. This EOS relates the pressure , the specific volume , and the specific internal energy of the liquid as follows:…”

Section: The Compressible Model For Watermentioning

confidence: 99%

An Adaptively-damped Compressible-liquid Model for Non-cavitating Hydraulic Surges

Chandran

Raju

Salih

2020

IJE

View full text Add to dashboard Cite

This research presents a compact and computationally-efficient two-equation compressible-liquid model. The model is specifically developed for the numerical computation of hydraulic surges in pipes under high fluid pressure where cavitation is absent. The proposed model aims to simplify the threeequation model of Neuhaus et al. for two-phase cavitational hammers. Compressible effects in liquid during the transients are considered by including a suitable equation of state into the model. A tunable function of the relative local pressure fluctuation called 'Variable Friction Coefficient' (VFC) for the flow transients is also incorporated into the model. For the accurate modeling of wave propagation, the split-coefficient matrix (SCM) method for characteristic-direction based splitting of eigenvalues is used in the study. The results show that the proposed two-equation model can reproduce the results from the three-equation model at a substantially reduced computational cost. The integration of the variable friction coefficient into the two-equation compressible-liquid model further improved the solver capability. The results computed using this aggregate solver are superior to the original three-equation model and the two-equation model without VFC. The results also suggest that the variable friction coefficient imparts adaptive damping capability to the solver model. This feature of the model is visible in the improved accuracy in the modeling of decaying pressure waves. The aggregate solver model, i.e., `the variable friction coefficient integrated two-equation compressible-liquid model,' offers a greatly simplified mathematical model and an inexpensive computational solver for the simulation of hydraulic surges in non-cavitating flow transients.

show abstract

A modified equation of state for water for a wide range of pressure and the concept of water shock tube

Cited by 21 publications

References 20 publications

Electrical wire explosion as a source of underwater shock waves

Electrical wire explosion as a source of underwater shock waves

The Gilmore-NASG model to predict single-bubble cavitation in compressible liquids

An Adaptively-damped Compressible-liquid Model for Non-cavitating Hydraulic Surges

Contact Info

Product

Resources

About