On the spheroidization of rod-shaped particles of finite length

摘要: The governing equation for the capillarity-induced shape changes of a surface revolution by diffusion, $$\frac{{\partial n}}{{\partial t}} = \frac{B}{y}\frac{\partial }{{\partial s}}\left( {y\frac{{\partial K}}{{\partial s}}} \right)$$ where∂n/∂t is normal velocity surface,y measured to axis revolution,s arc length,K total curvature andB kinetic parameter which constant given temperature and material, presented. A numerical solution this used analyse finite cylinders with hemispherical ends. critical length-to-diameter ratio (L/D) 7.2 predicted, below only one spheroidal particle results above two or more are formed, shown have experimental support in several systems.