Surface topography effects on dynamic behavior of water droplet over a micro-structured surface using an improved-VOF based lattice Boltzmann method

2022 ◽  
pp. 118509
Author(s):  
Saleh Mohammadrezaei ◽  
Majid Siavashi ◽  
Sasan Asiaei
Keyword(s):  
Lattice Boltzmann Method ◽  
Surface Topography ◽  
Dynamic Behavior ◽  
Lattice Boltzmann ◽  
Water Droplet ◽  
Structured Surface ◽  
Boltzmann Method

scholarly journals Simulation of Droplet Resting on Micro-structured Surface by Lattice Boltzmann Method

2014 ◽  
Vol 79 ◽  
pp. 133-136
Author(s):  
Yu-Tang Ju ◽  
Feng-Chun Kuo ◽  
Yi-Ting Lin ◽  
Chao-An Lin
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Structured Surface ◽  
Boltzmann Method

Removal of Shape Deformation in the Free Energy Based Lattice Boltzmann Method for Large Density Ratio

2015 ◽  
Author(s):  
Jia-ming Gong ◽  
Nobuyuki Oshima ◽  
Yutaka Tabe
Keyword(s):  
Free Energy ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Water Droplet ◽  
Density Ratio ◽  
Shape Deformation ◽  
Staggered Grids ◽  
Gas Channel ◽  
Large Density Ratio ◽  
Boltzmann Method

The free energy based lattice Boltzmann method (LBM) for two-phase flow with large density ratio is used to simulate droplet dynamics in the polymer electrolyte fuel cell (PEFC). The shape deformation of a static water droplet in the gas channel occurred in the simulations was eliminated. In this LBM model, two types of staggered grids which respectively make use of the velocity components from the orthogonal and diagonal directions are blended to calculate the hydrodynamic pressure from the Poisson equation, with the successive over-relaxation method (SOR). It is found that the simulated water droplet shape is determined by both the blending factor of the two types of staggered grids and the radius length. The appropriate blending factor for each radius length is summarized to optimize the simulation. The dependence of shape deformation on the blending factor and the radius length is further validated while considering the wettability effect of the solid wall of the gas channel. It is proved that the summarized appropriate blending factors are still practical when the concept of equivalent radius length is adopted.

scholarly journals Investigations of water droplet impact and freezing on a cold substrate with the lattice Boltzmann method

2021 ◽  
pp. 100109
Author(s):  
Jesús García Pérez ◽  
Sébastien Leclaire ◽  
Sami Ammar ◽  
Jean-Yves Trépanier ◽  
Marcelo Reggio ◽  
...  
Keyword(s):  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Water Droplet ◽  
Droplet Impact ◽  
Boltzmann Method

Physically-based enhancement in shallow water resimulation

2016 ◽  
Vol 07 (03) ◽  
pp. 1650029 ◽  
Author(s):  
Hongyan Quan ◽  
Yahui Song ◽  
Xinquan Zhou ◽  
Li Zhang
Keyword(s):  
Physical Properties ◽  
Lattice Boltzmann Method ◽  
Shallow Water ◽  
Dynamic Behavior ◽  
Lattice Boltzmann ◽  
Dynamic Geometry ◽  
Recovery Method ◽  
Fluid Surface ◽  
Physically Based ◽  
Boltzmann Method

To resimulate a customized fluid derived product by analyzing an existing fluid is significant and difficult. This paper proposes a driven model recovery method, which is challenging in fluid resimulation customization. First, fluid physical properties are calculated under the constraints of appearance and dynamic behavior of the example water. Second, a hybrid particle lattice Boltzmann method for shallow water (LBMSW) is recovered from the dynamic geometry on fluid surface. As it is found that the resimulation details fade gradually with LBMSW auto-advection, a physically-based enhancement scheme is presented. A nonlinear algorithm is introduced to stretch the faded density to retain resimulation details. Experiments show that the proposed approach can obtain more realistic resimulation products in several challenging scenarios.

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