Numerical Analysis of Droplet Impingement Using the Moving Particle Semi-implicit Method

  • Xiong J
  • Koshizuka S
  • Sakai M
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Abstract

Droplet impingement onto a rigid wall is simulated in two and three dimensions using the moving particle semi-implicit method. In two-dimensional calculations, the convergence is achieved and the propagation of a shockwave in a droplet is captured. The average pressure on the contact area decreases gradually after the maximum value. The numerically obtained maximum average impact pressure agrees with the Heymann correlation. A large shear stress appears at the contact edge due to jetting. A parametric study shows that the droplet diameter has only a minor effect on the pressure load due to droplet impingement. When the impingement takes place from an impact angle of π/4 rad, the pressure load and shear stress show a dependence only on the normal velocity to the wall. A comparison between the three-dimensional and two-dimensional results shows that consideration of the three-dimensional effect can decrease the average impact pressure by about 12%. © Atomic Energy Society of Japan.

Author-supplied keywords

  • Compressible flow
  • Erosion
  • Free surface
  • Liquid droplet impingement
  • MPS method
  • Mechanical load
  • Shockwave

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