Numerical analysis of the impact of two droplets with a liquid film using an incompressible SPH method

Xu, Xiaozhong; Ouyang, Jie; Jiang, Tao; Li, Qiang

doi:10.1007/s10665-013-9634-9

Cited by 54 publications

(10 citation statements)

References 46 publications

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“…Generally, a much higher liquid compression degree may cause a more obvious liquid protruding phenomenon, namely, a much larger protruding height and much longer duration. The liquid compression may at last induce a huge so-called water hammer pressure [25], and this liquid compression is jointly impacted by the shock wave, the liquid velocity, the jet shape, and so on [23,[26][27][28]. According to Huang et al [23], the liquid-solid collision will induce a shock wave that will propagate against the impact direction in a compressive manner.…”

Section: Resultsmentioning

confidence: 99%

Impinging Performance of High-Pressure Water Jets Emitting from Different Nozzle Orifice Shapes

Huang

et al. 2020

Geofluids

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The impinging pressure of a water jet is a key factor in engineering applications, and the jet shape has a great influence on this pressure. In this paper, five different nozzle shapes were designed, and impacting tests were conducted based on a self-designed experimental platform using a PVDF piezoelectric film sensor and a high-speed camera to record the impacting data. Additionally, the computational fluid dynamics (CFD) method was also applied to study the velocity distribution. The results show that the pressure profiles of different water jet shapes impacting onto a solid surface present a consistent pattern, namely, an initial transient and enormous peak pressure and then a longer and smaller stagnation pressure. Although the stagnation pressure in this paper is not sufficiently obvious, the peak pressures of the five water jet shapes are much different from one another. Under the same inlet pressure, the peak pressure of the circular water jet is the largest, and those of the square, triangular, cross-shaped, and elliptical water jets decrease in turn. The flowing regimes captured by the high-speed camera together with the CFD simulation results indicate that the discrepancy in the peak pressure may be a combined action of the liquid velocities and jet head shapes.

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Section: Resultsmentioning

confidence: 99%

Impinging Performance of High-Pressure Water Jets Emitting from Different Nozzle Orifice Shapes

Huang

et al. 2020

Geofluids

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“…Multiphase particle methods [26,[29][30][31][32][33][34][35][36][37][38][39][40][41] have been developed by many researchers, but most of them are based on explicit SPH method (e.g. [29-31, 39, 40]).…”

Section: Introductionmentioning

confidence: 99%

A multiphase MPS solver for modeling multi-fluid interaction with free surface and its application in oil spill

Duan

Chen

Zhang

et al. 2017

Computer Methods in Applied Mechanics and Engineering

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Numerical simulation of free surface multi-fluid flow is a challenging problem owning to the interaction between deformed interface and free surface. In this paper, a multiphase particle solver (free surface multiphase moving particle semi-implicit method, FS-MMPS) is developed to predict the early spreading flow of spilled oil where exist the oil-water interface and air-oil/air-water free surface. First, a multiphase virtual particle model is proposed to substitute the inaccurate free surface boundary condition for multiphase flow in conventional MPS methods. Specifically, virtual particles of different liquid phases are compensated outside free surface so that the pressure of free surface particles can be solved from pressure Poisson equation, thereby improving the accuracy of multi-fluid interaction at free surface. Meanwhile, a pressure gradient model based on the coupling of Taylor series expansion and dynamic specification of particle stabilizing term (PST) is proposed to simultaneously enhance accuracy and depress instability caused by multiphase virtual particles. Experiments of early spreading of thick oil slicks and continuous oil spill from a damaged tank are conducted for validation and demonstration of the accuracy and

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“…To tackle two-phase flows with surface evolution, the LS method and the VOF method are two of the most common ways among other numerical methods [2] , such as the smoothed particle hydrodynamics (SPH) method [23] , the lattice Boltzmann method (LBM) [24] , and the boundary integral method (BIM) [16] for potential flow. The CLSVOF method is the coupled version of these two separate methods.…”

Section: Coupled Level-set Volume Of Fluid (Clsvof) Methodsmentioning

confidence: 99%

Effect of viscosity on motion of splashing crown in high speed drop impact

Yang

Liu

2017

Appl. Math. Mech.-Engl. Ed.

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A splashing crown is commonly observed when a high-speed drop impacts a liquid film. The influence of the liquid viscosity on the crown's evolution is not yet clear. We review several existing theories of this problem, and carry out a series of numerical simulations. We find that a three-segment model can describe the crown's motion. In the very early stage when the crown is barely visible, the influence of viscosity is small. Later, a shallow water approach used in most existing models is applicable as long as the initial conditions are formulated properly. They depend on viscous dissipation in the intermediate period. Preliminary estimation based on a dissipation function is proposed to characterize the influence of viscosity in this problem.

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Numerical analysis of the impact of two droplets with a liquid film using an incompressible SPH method

Cited by 54 publications

References 46 publications

Impinging Performance of High-Pressure Water Jets Emitting from Different Nozzle Orifice Shapes

Impinging Performance of High-Pressure Water Jets Emitting from Different Nozzle Orifice Shapes

A multiphase MPS solver for modeling multi-fluid interaction with free surface and its application in oil spill

Effect of viscosity on motion of splashing crown in high speed drop impact

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