Numerical simulation of oblique impact of a droplet on a surface in the film boiling regime

作者：Pournaderi P; Pishevar A R^*

来源：Scientia Iranica, 2014, 21(1): 119-129.

• Oblique impact
• Leidenfrost regime
• Droplet
• Hot Surface
• Lever set
• Ghost fluid method

In this study, we focused on simulation of the oblique collision of a water droplet on a superheated surface via a novel algorithm. In this approach, the vaporization rate of the droplet is computed and is accurately applied in the solution process. The high temperature of the surface leads to the formation of a vapor layer between the droplet and surface. Mesh clustering near the surface is used to capture the effect of the vapor layer. The level set method, in conjunction with the ghost fluid method, is used to represent a sharp interface. Available experiments confirmed the validity of the proposed algorithm. The Weber number based on normal velocity is the dominant parameter in the oblique impact process. The spreading radius and contact time of the droplet are dependent on the normal Weber number. An increase in the initial normal velocity of the droplet enhances the total heat removal from the wall.

• 出版日期2014-2