@Article{CiCP-23-1150,
author = {Qingyu Zhang, Changsheng Zhu and Mingfang Zhu},
title = {Three-Dimensional Numerical Simulation of Droplet Evaporation Using the Lattice Boltzmann Method Based on GPU-CUDA Accelerated Algorithm},
journal = {Communications in Computational Physics},
year = {2018},
volume = {23},
number = {4},
pages = {1150--1166},
abstract = {<p style="text-align: justify;">The three-dimensional (3D) single component multiphase Shan-Chen lattice
Boltzmann (LB) model is implemented with the GPU-accelerated algorithm based on
the CUDA platform for the simulation of droplet evaporation. It is found that the
speed-up of the GPU-accelerated 3D LB model with respect to the CPU-based 3D LB
model increases with the computational node number. The maximum speed-up is
higher than around 300 when the computational domain is composed of $256^3$ computational
nodes. Regarding the calculations performed using the GPU-accelerated
3D LB model that incorporates the operation of data output through CPU, the percentage
of computational time consumed by CPU for executing the sequential tasks
increases with the computational node number. The model validations are carried out
through the comparisons of the simulations with Laplace&#39;s law and the $D^2$ law. Then,
the GPU-accelerated 3D LB model is applied to simulate the evaporation phenomena
of a droplet laying on smooth and rough solid surfaces. It is shown that the contact angle
of the evaporating droplet on a smooth solid surface almost remains stable during
the evaporation process. For the evaporating droplet sitting on a rough solid surface,
however, the time evolution of the contact angle displays obvious oscillations. The
simulated morphology evolution of the evaporating droplet sitting on a rough solid
surface demonstrates that the oscillations of the contact angle are governed by the
stick-slip movement, namely, depinning and receding, of the liquid-gas-solid contact
line. This can be attributed to the large hysteresis of the droplet displaying the wetting
Wenzel state.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.OA-2016-0185},
url = {http://global-sci.org/intro/article_detail/cicp/11209.html}
}