An integrated smoothed particle hydrodynamics method for numerical simulation of the droplet impacting with heat transfer. (1st March 2021)

• Record Type: Journal Article
• Authors: Li, G.Y.; Ma, X.J.; Zhang, B.W.; Xu, H.W.
• Is Part Of: Engineering analysis with boundary elements. Volume 124(2021)
• Page Start: 1
• Page End: 13
• Publication Date: 2021-03-01
• Subjects: Smoothed particle hydrodynamics (SPH) -- Droplet impacting -- Surface tension -- Heat transfer -- Numerical simulation; Boundary element methods -- Periodicals; Engineering mathematics -- Periodicals; Équations intégrales de frontière, Méthodes des -- Périodiques; Mathématiques de l'ingénieur -- Périodiques; Boundary element methods; Engineering mathematics; Periodicals; 620.00151
• DOI: 10.1016/j.enganabound.2020.12.003
• Languages: English
• ISSNs: 0955-7997

Abstract

Abstract: According to the complex flow dynamics of droplets impacting on the wall, an integrated smoothed particle hydrodynamics (SPH) method is developed by a series of improved techniques including artificial viscosity, kernel gradient correction (KGC) technique, boundary treatment and so on, combined with the surface tension based on the continuous surface force (CSF) model in this paper. This method is validated by simulations of the square cavity flow and natural variations of a square droplet, and effects of particle diameter, kernel function, and artificial viscosity coefficient are also analyzed. On this basis, dynamic behavior of the droplet impacting on the wall with heat transfer is studied, and the results agree well with the experimental results. It is observed that the wall characteristics have a significant influence on the droplet deformation, and the droplet tends to spread on the hydrophilic wall. In the investigated temperature difference, the influence of temperature difference could be ignored, but there is energy exchange between the droplet and the wall. In general, the spreading law of droplet is consistent with the physical phenomena, which shows that the integrated SPH method can effectively deal with engineering problems involving a droplet impacting on the wall with heat transfer.