Thermal pseudo-potential lattice Boltzmann method for simulating cavitation bubbles collapse near a rigid boundary

2021 ◽  
Vol 217 ◽  
pp. 104817
Author(s):  
Haonan Peng ◽  
Jianmin Zhang ◽  
Xiaolong He ◽  
Yurong Wang
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Rigid Boundary ◽  
Cavitation Bubbles ◽  
Boltzmann Method ◽  
Pseudo Potential

Investigation of cavitation bubble collapse near rigid boundary by lattice Boltzmann method

2016 ◽  
Vol 28 (3) ◽  
pp. 442-450 ◽  
Author(s):  
Ming-lei Shan ◽  
Chang-ping Zhu ◽  
Xi Zhou ◽  
Cheng Yin ◽  
Qing-bang Han
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Cavitation Bubble ◽  
Bubble Collapse ◽  
Rigid Boundary ◽  
Boltzmann Method

Analysis of freezing process about falling droplet using the lattice Boltzmann method

2018 ◽  
Vol 28 (10) ◽  
pp. 2442-2462 ◽  
Author(s):  
Xin Zhao ◽  
Bo Dong ◽  
Weizhong Li
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Potential Model ◽  
Horizontal Velocity ◽  
Freezing Process ◽  
Droplet Deformation ◽  
Droplet Shape ◽  
Content Type ◽  
Boltzmann Method ◽  
Pseudo Potential

Purpose The freezing phenomenon of a falling droplet is a frequently encountered phenomenon in various applications, such as spray crystallization, hail formation and artificial snowmaking. Therefore, this paper aims to understand the freezing processes of a falling droplet without and with initial horizontal velocity in a cold space. Design/methodology/approach The freezing processes of a falling droplet were characterized using a modified enthalpy-based lattice Boltzmann method. Findings The temperature field, streamlines and freezing process of the falling droplet were investigated and analyzed. The lower part of the droplet was frozen earlier than the upper part. The freezing trend slowed down in the later stage of the freezing process. The droplet shape was related to the initial vertical velocity, nucleation temperature and initial horizontal velocity. Originality/value A modified enthalpy-based lattice Boltzmann method is proposed. In the model, the improved pseudo-potential model is used and the radiation is considered. This method was firstly used to simulate the freezing process of a falling droplet. By examining these freezing processes in detail, the freezing trend and the effect factors of droplet deformation and freezing time were obtained, respectively.

scholarly journals Simulations of Boiling Systems Using a Lattice Boltzmann Method

2013 ◽  
Vol 13 (3) ◽  
pp. 696-705 ◽  
Author(s):  
L. Biferale ◽  
P. Perlekar ◽  
M. Sbragaglia ◽  
F. Toschi
Keyword(s):  
Numerical Simulations ◽  
Lattice Boltzmann Method ◽  
Latent Heat ◽  
Lattice Boltzmann ◽  
Temperature Fluctuations ◽  
Convective Cell ◽  
Turbulent Convection ◽  
Multi Phase ◽  
Boltzmann Method ◽  
Pseudo Potential

AbstractWe report about a numerical algorithm based on the lattice Boltzmann method and its applications for simulations of turbulent convection in multi-phase flows. We discuss the issue of ’latent heat’ definition using a thermodynamically consistent pseudo-potential on the lattice. We present results of numerical simulations in 3D with and without boiling, showing the distribution of pressure, density and temperature fluctuations inside a convective cell.

scholarly journals Study of Cavitation Bubble Collapse near a Wall by the Modified Lattice Boltzmann Method

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1439 ◽  
Author(s):  
Yunfei Mao ◽  
Yong Peng ◽  
Jianmin Zhang
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Cavitation Bubble ◽  
Morphological Changes ◽  
Bubble Collapse ◽  
Wall Region ◽  
Wall Surface ◽  
Cavitation Bubbles ◽  
Boltzmann Method ◽  
Near Wall

In this paper, an improved lattice Boltzmann Shan‒Chen model coupled with Carnahan-Starling equation of state (C-S EOS) and the exact differential method (EDM) force scheme is used to simulate the cavitation bubble collapse in the near-wall region. First, the collapse of a single cavitation bubble in the near-wall region was simulated; the results were in good agreement with the physical experiment and the stability of the model was verified. Then the simulated model was used to simulate the collapse of two cavitation bubbles in the near-wall region. The main connection between the two cavitation bubble centre lines and the wall surface had a 45° angle and parallel and the evolution law of cavitation bubbles in the near-wall region is obtained. Finally, the effects of a single cavitation bubble and double cavitation bubble on the wall surface in the near-wall region are compared, which can be used to study the method to reduce the influence of cavitation on solid materials in practical engineering. The cavitation bubble collapse process under a two-dimensional pressure field is visualized, and the flow field is used to describe the morphological changes of cavitation bubble collapse in the near-wall region. The improved lattice Boltzmann Method (LBM) Shan‒Chen model has many advantages in simulating cavitation problems, and will provide a reference for further simulations.

Simulation of two-phase fluid mixture flow in rectangular two-inlet cavity using lattice Boltzmann method

2014 ◽  
Vol 25 (04) ◽  
pp. 1450004 ◽  
Author(s):  
Ruofan Qiu ◽  
Anlin Wang ◽  
Qiwei Gong ◽  
Tao Jiang
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Potential Model ◽  
Vof Method ◽  
Two Phase ◽  
Fluid Mixture ◽  
Mixture Flow ◽  
Boltzmann Method ◽  
Phase Fluid ◽  
Pseudo Potential

In this paper, two-phase fluid mixture flow in rectangular two-inlet cavity is studied using lattice Boltzmann method (LBM). To simulate two-phase fluids with large viscosity difference, the pseudo-potential model is improved. The improved model is verified for surface tension through Laplace's law and shown much better performance in simulating fluids with large viscosity difference than pseudo-potential model. The multiple-relaxation-time (MRT) scheme is used to enhance numerical stability. Then the two-phase fluid mixture flow with same and different viscosity in two-inlet cavity is simulated by present lattice Boltzmann (LB) model, pseudo-potential LB model and volume-of-fluid (VOF) method, respectively. The comparison of these numerical results shows that LB model is more suitable for such kind of flow than VOF method, since it can reflect repulsive forces and transitional region of two-phase fluids in dynamic process. Moreover, it also shows that present LB model has better dynamic stability than pseudo-potential model. Furthermore, simulations of the two-phase fluid mixture flow with different fluid viscosities, inlet velocities, inlet heights and outlet positions using present LB model are presented, exhibiting their effect to contact area of fluids.

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