scholarly journals Lattice Boltzmann Method for Free Surface Impacting on Vertical Cylinder : A Comparison with Experimental Data

Evergreen ◽  
2017 ◽  
Vol 4 (2/3) ◽  
pp. 28-37
Author(s):  
Nik Mohd ◽  
Mohamed M. Kamra ◽  
Makoto Sueyoshi ◽  
Changhong Hu
Keyword(s):  
Experimental Data ◽  
Free Surface ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Vertical Cylinder ◽  
Boltzmann Method ◽  
Comparison With Experimental Data

SIMULATION OF AN AXISYMMETRIC RISING BUBBLE BY A MULTIPLE RELAXATION TIME LATTICE BOLTZMANN METHOD

2009 ◽  
Vol 23 (24) ◽  
pp. 4907-4932 ◽  
Author(s):  
ABBAS FAKHARI ◽  
MOHAMMAD HASSAN RAHIMIAN
Keyword(s):  
Free Surface ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Rise Velocity ◽  
Rising Bubble ◽  
Wide Range ◽  
Theoretical Predictions ◽  
Multiple Relaxation Time ◽  
Bubble Rising ◽  
Boltzmann Method

In this paper, the lattice Boltzmann method is employed to simulate buoyancy-driven motion of a single bubble. First, an axisymmetric bubble motion under buoyancy force in an enclosed duct is investigated for some range of Eötvös number and a wide range of Archimedes and Morton numbers. Numerical results are compared with experimental data and theoretical predictions, and satisfactory agreement is shown. It is seen that increase of Eötvös or Archimedes number increases the rate of deformation of the bubble. At a high enough Archimedes value and low Morton numbers breakup of the bubble is observed. Then, a bubble rising and finally bursting at a free surface is simulated. It is seen that at higher Archimedes numbers the rise velocity of the bubble is greater and the center of the free interface rises further. On the other hand, at high Eötvös values the bubble deforms more and becomes more stretched in the radial direction, which in turn results in lower rise velocity and, hence, lower elevations for the center of the free surface.

Numerical Simulation of Vortex-Induced Motion With Free Surface by Lattice Boltzmann Method

2014 ◽  
Author(s):  
Akitaka Miyamura ◽  
Shinichiro Hirabayashi ◽  
Hideyuki Suzuki
Keyword(s):  
Numerical Simulation ◽  
Fluid Flow ◽  
Free Surface ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Wave Resistance ◽  
Floating Structure ◽  
Induced Motion ◽  
Height Change ◽  
Boltzmann Method

In this study, numerical simulation of the fluid flow by using lattice Boltzmann method is carried out and the vortex-induced motion (VIM) of a cylindrical floating structure is calculated. The way of calculate the fluid flow, fluid force and floating body’s movement is introduced. The fluid flow with free surface is also calculated. The height change of water surface exerts the effect to the evaluation of hydrostatic pressure and wave resistance. In this study, the method to express the movement of free surface is introduced.

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