A modified phase-field three-dimensional model for droplet impact with solidification

Autor:	Ben Q. Li, Bin Zhao, Yu Bai, Qingzhen Yang, Shaochong Zhu, Mingguang Shen, Yu Wang, Yongbao Hu, Tianqing Li
Rok vydání:	2019
Předmět:	Fluid Flow and Transfer Processes Thermal contact conductance Work (thermodynamics) Materials science Field (physics) Mechanical Engineering General Physics and Astronomy Mechanics Physics::Fluid Dynamics Latent heat Heat transfer Fluid dynamics Supersonic speed Thermal spraying
Zdroj:	International Journal of Multiphase Flow. 116:51-66
ISSN:	0301-9322
DOI:	10.1016/j.ijmultiphaseflow.2019.04.004
Popis:	A modified phase-field three-dimensional model has been developed to simulate the spreading of an impacting droplet undergoing solidification. The model is based on the numerical solution of the Cahn-Hilliard equation coupled with the Navier-Stokes equations for fluid flow and the energy balance equation for heat transfer. The solidification profile is tracked by treating the latent heat as a source term in the energy equation, which is modified to work with the Cahn-Hilliard equation. To verify the model, five cases were tested and matched well with experiments. Also, the effect of thermal contact resistance on the maximum spread factor of a solidifying droplet is discussed. One case was taken from practical thermal spraying conditions where a solidifying ceramic droplet spreads on a cold surface at a supersonic impact velocity; computed results are consistent with available measurements.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0700a92669b0724cbb26abd71c2dd9bf https://doi.org/10.1016/j.ijmultiphaseflow.2019.04.004 Zobrazit plný text záznamu Full Text from ScienceDirect