A coupled SPH–FVM method for simulating incompressible interfacial flows with large density difference

2021 ◽  
Vol 128 ◽  
pp. 227-243
Author(s):  
Yixiang Xu ◽  
Gang Yang ◽  
Yawei Zhu ◽  
Dean Hu
Keyword(s):  
Density Difference ◽  
Interfacial Flows ◽  
Large Density

A particle method for two-phase flows with large density difference

2015 ◽  
Vol 103 (4) ◽  
pp. 235-255 ◽  
Author(s):  
M. Luo ◽  
C. G. Koh ◽  
M. Gao ◽  
W. Bai
Keyword(s):  
Particle Method ◽  
Density Difference ◽  
Two Phase Flows ◽  
Two Phase ◽  
Large Density

1308 Study of a finite difference lattice Boltzmann model considering large density difference

2004 ◽  
Vol 2004.79 (0) ◽  
pp. _13-15_-_13-16_
Author(s):  
Michihisa Tsutahara ◽  
Kazuhiko Ogawa ◽  
Masahiko Sakamoto ◽  
Hiroki Yokoyama ◽  
Masakazu Tajima ◽  
...  
Keyword(s):  
Finite Difference ◽  
Lattice Boltzmann ◽  
Density Difference ◽  
Lattice Boltzmann Model ◽  
Large Density ◽  
Boltzmann Model

scholarly journals Saline Gravity Currents with Large Density Difference with Fresh Water in a Valley of Trapezoidal Shape

2020 ◽  
Vol 2 (1) ◽  
pp. 64
Author(s):  
Spyros Vardakostas ◽  
Stavros Kementsetsidis ◽  
Evangelos Keramaris
Keyword(s):  
Oil Spills ◽  
Salt Water ◽  
Gravity Current ◽  
Liquid Waste ◽  
Realistic Model ◽  
Gravity Currents ◽  
Density Difference ◽  
High Definition ◽  
Trapezoidal Shape ◽  
Large Density

In this study, lock-exchange experiments in a tank of rectangular upper cross section and a lower valley of trapezoidal shape are performed. This is a realistic model of the valleys, which occur in nature. The experiments are performed for equal depths of heavy and light fluid on both sides of the lock gate. Density difference between salt water and clear water is varied between 0.5% and 0.9%. This density difference exists in liquid waste whose spreading is an environmental problem. The release of pollutants into rivers, oil spills in the ocean and the outflow of desalinations plants are examples of man-made gravity currents that cause negative environmental impacts. The aim of this study is to contribute to a better understanding of the propagation and process of mixing of a gravity current with large density difference with water. The movement of the gravity current is monitored with a digital video of high definition, the front velocity is measured and the height of the front is captured. Twenty experiments were performed, ten inside the trapezoidal section (H = 5 or 10 cm) and ten over the trapezoidal section (H = 17.5 or 25 cm). Results are compared with those of gravity currents in lock-exchange experiments, which were performed by other researchers.

Thermals with large density difference

1984 ◽  
Vol 18 (6) ◽  
pp. 1051-1057 ◽  
Author(s):  
W.D Baines ◽  
E.J Hopfinger
Keyword(s):  
Density Difference ◽  
Large Density

Feedout and Richtmyer–Meshkov instability at large density difference

2001 ◽  
Vol 8 (2) ◽  
pp. 592-605 ◽  
Author(s):  
Alexander L. Velikovich ◽  
Andrew J. Schmitt ◽  
John H. Gardner ◽  
Nathan Metzler
Keyword(s):  
Density Difference ◽  
Large Density

scholarly journals Gas Bubbles Expansion and Physical Dependences in Aluminum Electrolysis Cell: From Micro- to Macroscales Using Lattice Boltzmann Method

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Mouhamadou Diop ◽  
Frédérick Gagnon ◽  
Li Min ◽  
Mario Fafard
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Density Ratio ◽  
Gas Bubbles ◽  
Immiscible Fluids ◽  
Density Difference ◽  
Electrolysis Cell ◽  
Two Phase ◽  
Large Density ◽  
Boltzmann Method

This paper illustrates the results obtained from two-dimensional numerical simulations of multiple gas bubbles growing under buoyancy and electromagnetic forces in a quiescent incompressible fluid. A lattice Boltzmann method for two-phase immiscible fluids with large density difference is proposed. The difficulty in the treatment of large density difference is resolved by using nine-velocity particles. The method can be applied to simulate fluid with the density ratio up to 1000. To show the efficiency of the method, we apply the method to the simulation of bubbles formation, growth, coalescence, and flows. The effects of the density ratio and the initial bubbles configuration on the flow field induced by growing bubbles and on the evolution of bubbles shape during their coalescence are investigated. The interdependencies between gas bubbles and gas rate dissolved in fluid are also simulated.

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