scholarly journals Multiphase simulation of liquid jet breakup using smoothed particle hydrodynamics

2017 ◽  
Vol 28 (04) ◽  
pp. 1750054 ◽  
Author(s):  
Majid Pourabdian ◽  
Pourya Omidvar ◽  
Mohammad Reza Morad
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Multiphase Flows ◽  
Numerical Solutions ◽  
Kernel Functions ◽  
Liquid Jet ◽  
Two Phase ◽  
Breakup Length ◽  
Jet Breakup ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

This paper deals with numerical modeling of two-phase liquid jet breakup using the smoothed particle hydrodynamics (SPH) method. Simulation of multiphase flows involving fluids with a high-density ratio causes large pressure gradients at the interface and subsequently divergence of numerical solutions. A modified procedure extended by Monaghan and Rafiee is employed to stabilize the sharp interface between the fluids. Various test cases such as Rayleigh–Taylor instability, two-phase still water and air bubble rising in water have been conducted, by which the capability of accurately capturing the physics of multiphase flows is verified. The results of these simulations are in a good agreement with analytical and previous numerical solutions. Finally, the simulation of the breakup process of liquid jet into surrounding air is accomplished. The whole numerical solutions are accomplished for both Wendland and cubic spline kernel functions and Wendland kernel function gave more accurate results. Length of liquid breakup in Rayleigh regime is calculated for various flow conditions such as different Reynolds and Weber numbers. The results of breakup length demonstrate in satisfactory agreement with the experimental correlation. Finally, impinging distance and breakup length of a simple multijet setup are analyzed. The two-jet multijet has a longer breakup length than a three-jet one.

scholarly journals A Local Semi-Fixed Ghost Particles Boundary Method for WCSPH

2021 ◽  
Vol 9 (4) ◽  
pp. 416
Author(s):  
Kaidong Tao ◽  
Xueqian Zhou ◽  
Huilong Ren
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Numerical Solutions ◽  
Kernel Functions ◽  
Numerical Accuracy ◽  
Dynamic Simulations ◽  
Boundary Method ◽  
Weakly Compressible ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
New Generation

Due to the convenience and flexibility in modeling complex geometries and deformable objects, local ghost particles methods are becoming more and more popular. In the present study, a novel local semi-fixed ghost particles method is proposed for weakly compressible smoothed particle hydrodynamics (WCSPH). In comparison with the previous local ghost particles methods, the new boundary method can effectively reduce spurious pressure oscillations and smooth the flow field. Besides, the new generation mechanism of fictitious particles is simple and robust, which is suitable for all kinds of kernel functions with different sizes of the support domain. The numerical accuracy and stability of the new smoothed particle hydrodynamics (SPH) scheme are validated for several typical benchmark cases. A detailed investigation into the pressure on solid walls and the surface elevation in dynamic simulations is also conducted. A comparison of numerical results shows that the new boundary method helps reduce the oscillations in the numerical solutions and improves the numerical accuracy of the pressure field.

A smoothed particle hydrodynamics (SPH) formulation of a two-phase mixture model and its application to turbulent sediment transport

2019 ◽  
Vol 31 (10) ◽  
pp. 103303 ◽  
Author(s):  
Erwan Bertevas ◽  
Thien Tran-Duc ◽  
Khoa Le-Cao ◽  
Boo Cheong Khoo ◽  
Nhan Phan-Thien
Keyword(s):  
Sediment Transport ◽  
Mixture Model ◽  
Smoothed Particle Hydrodynamics ◽  
Two Phase ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Phase Mixture

AN IMPLEMENTATION OF THE SMOOTHED PARTICLE HYDRODYNAMICS FOR HYPERVELOCITY IMPACTS AND PENETRATION TO LAYERED COMPOSITES

2013 ◽  
Vol 10 (03) ◽  
pp. 1350056 ◽  
Author(s):  
G. R. LIU ◽  
C. E. ZHOU ◽  
G. Y. WANG
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
High Velocity ◽  
Numerical Solutions ◽  
Equations Of State ◽  
Damage Model ◽  
High Rate ◽  
Material Strength ◽  
Layered Composites ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Driven by applications in the design of protective structure systems, the need to model high velocity impact is becoming of great importance. This paper presents a Smoothed Particle Hydrodynamics (SPH) procedure for 3D simulation of high velocity impacts where high rate hydrodynamics and material strength are of great concern. The formulations and implementations of the Johnson–Cook strength and damage model considering temperature effect, and Mie–Gruneison and Tilloton equations of state are discussed. The performance of the procedure is demonstrated through two example analyses, one modeling a cubic tungsten projectile penetrating a multi-layered target panel and the other involving a sphere perforating a thin plate. The results obtained, with comparisons made to both experimental results and other numerical solutions previously reported, show that our SPH-3D implementation is accurate and reliable for modeling the overall behavior of the high rate hydrodynamics with material strength.

scholarly journals Simulations of intermittent two-phase flows in pipes using smoothed particle hydrodynamics

2018 ◽  
Vol 177 ◽  
pp. 101-122 ◽  
Author(s):  
Thomas Douillet-Grellier ◽  
Florian De Vuyst ◽  
Henri Calandra ◽  
Philippe Ricoux
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Two Phase Flows ◽  
Two Phase ◽  
Particle Hydrodynamics ◽  
Smoothed Particle
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