scholarly journals Numerical investigation on drag reduction with hydrophobic surface by lattice Boltzmann method

2015 ◽  
Vol 64 (18) ◽  
pp. 184702
Author(s):  
Zhang Ya ◽  
Pan Guang ◽  
Huang Qiao-Gao
Keyword(s):  
Drag Reduction ◽  
Lattice Boltzmann Method ◽  
Numerical Investigation ◽  
Lattice Boltzmann ◽  
Hydrophobic Surface ◽  
Boltzmann Method

Numerical investigation of magnetic multiphase flows by the fractional-step-based multiphase lattice Boltzmann method

2020 ◽  
Vol 32 (8) ◽  
pp. 083309 ◽  
Author(s):  
Xiang Li ◽  
Zhi-Qiang Dong ◽  
Peng Yu ◽  
Xiao-Dong Niu ◽  
Lian-Ping Wang ◽  
...  
Keyword(s):  
Lattice Boltzmann Method ◽  
Numerical Investigation ◽  
Lattice Boltzmann ◽  
Multiphase Flows ◽  
Fractional Step ◽  
Boltzmann Method

scholarly journals Study on droplet nucleation position and jumping on structured hydrophobic surface using the lattice Boltzmann method

2021 ◽  
pp. 149-149
Author(s):  
Gaojie Liang ◽  
Lijun Liu ◽  
Haiqian Zhao ◽  
Cong Li ◽  
Nandi Zhang
Keyword(s):  
Lattice Boltzmann Method ◽  
Significant Influence ◽  
Lattice Boltzmann ◽  
Hydrophobic Surface ◽  
Numerical Results ◽  
Nucleation Mode ◽  
Droplet Nucleation ◽  
Simulation Results ◽  
The Individual ◽  
Boltzmann Method

In this study, droplet nucleation and jumping on the conical microstructure surface is simulated using the Lattice Boltzmann Method (LBM). The nucleation and jumping laws of the droplet on the surface are summarized. The numerical results suggest that the height and the gap of the conical microstructure exhibit a significant influence on the nucleation position of the droplet. When the ratio of height to the gap of the microstructure(H/D) is small, the droplet tends to nucleate at the bottom of the structure. Otherwise, the droplet tends to nucleate towards the side of the structure. The droplet grown in the side nucleation mode possesses better hydrophobicity than that of the droplet grown in the bottom nucleation mode and the droplet jumping becomes easier. Apart from the coalescence of the droplets jumping out of the surface, jumping of individual droplets may also occur under certain conditions. The ratio of the clearance to the width of the conical microstructure(D/F) depends on the jumping mode of the droplet. The simulation results indicate that when the D/F ratio is greater than 1.2, the coalescence jump of droplets is likely to occur. On the contrary, the individual jump of droplets is easy to occur.

Numerical Investigation on Flow Field around Acoustic Panel in Jet Engine Fan Duct using Lattice Boltzmann Method

2017 ◽  
Vol 2017.23 (0) ◽  
pp. 114
Author(s):  
Daichi Yamamoto ◽  
Hiroya Mamori ◽  
Naoya Fukushima ◽  
Makoto Yamamoto ◽  
Ryo Kagaya ◽  
...  
Keyword(s):  
Flow Field ◽  
Lattice Boltzmann Method ◽  
Numerical Investigation ◽  
Lattice Boltzmann ◽  
Jet Engine ◽  
Boltzmann Method

scholarly journals Effect of surface micromorphology and hydrophobicity on condensation efficiency of droplets using the lattice Boltzmann method

2021 ◽  
pp. 287-287
Author(s):  
Lijun Liu ◽  
Gaojie Liang ◽  
Haiqian Zhao ◽  
Xiaoyan Liu
Keyword(s):  
Heat Transfer ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Hydrophobic Surface ◽  
Surface Hydrophobicity ◽  
Condensation Heat Transfer ◽  
Surface Microstructure ◽  
Condensation Process ◽  
Condensation Rate ◽  
Boltzmann Method

In the present study, the effects of the surface morphology and surface hydrophobicity on droplet dynamics and condensation efficiency are investigated using the lattice Boltzmann method (LBM). Different surface morphologies may have different condensation heat transfer efficiencies, resulting in diverse condensation rates under the same conditions. The obtained results show that among the studied morphologies, the highest condensation rate can be achieved for conical microstructures followed by the triangle microstructure, and the columnar microstructure has the lowest condensation rate. Moreover, it is found that when the surface microstructure spacing is smaller and the surface microstructure is denser, the condensation heat transfer between the surface structure and water vapor facilitates, thereby increasing the condensation efficiency of droplets. Furthermore, the condensation process of droplets is associated with the surface hydrophobicity. The more hydrophobic the surface, the more difficult the condensation heat transfer and the longer the required time for droplet nucleation. Meanwhile, a more hydrophobic surface means that it is harder for droplets to gather and merge, and the corresponding droplet condensation rate is also lower.

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