Abstract
This study investigates multiple successive collisions between elastic prolate spheroid particles and a rigid planar wall in vacuum. The influence of various factors on multiple particle–wall collisions, including the particle aspect ratio, orientation angle, impact velocity, material properties, size, impact angular velocity, and wall friction coefficient, is analyzed. The results show that secondary and tertiary collisions are primarily determined by the particle aspect ratio and orientation angle. Four particle aspect ratios (λ=1.5, 2, 3, and 5) are investigated. A secondary collision occurs for λ=2 to 5. For λ=5, the particle can collide with the wall three times in a row. The corresponding ranges of the particle orientation angles for the secondary and tertiary collisions are provided for different particle aspect ratios. The maximum elastic force acting on the particles during each collision was also analyzed. The proposed model is verified to be applicable to gas-driven particles, and an example of its implementation within a Lagrangian particle-tracking algorithm is provided.
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