Analysis of freezing process about falling droplet using the lattice Boltzmann method
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 15 October 2018
Issue publication date: 19 October 2018
Abstract
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.
Keywords
Acknowledgements
The work was jointly sponsored by the National Science Foundation of China (NSFC) under Grant No. 51776031, the key program of National Science Foundation of Liaoning Province under Grant No. 20170540182 and the Fundamental Research Funds for the Central Universities under Grant No. DUT16QY03.
Citation
Zhao, X., Dong, B. and Li, W. (2018), "Analysis of freezing process about falling droplet using the lattice Boltzmann method", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 28 No. 10, pp. 2442-2462. https://doi.org/10.1108/HFF-09-2017-0373
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited