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http://dx.doi.org/10.3795/KSME-B.2014.38.7.595

Characteristics of Kinetic Energy Transfer in Collisions Between Fragile Nanoparticle and Rigid Particle on Surface  

Choi, Min Seok (Dept. of Mechanical Engineering, Pohang Univ. of Science and Technology)
Lee, Jin Won (Dept. of Mechanical Engineering, Pohang Univ. of Science and Technology)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.7, 2014 , pp. 595-600 More about this Journal
Abstract
The characteristics of kinetic energy transfer during a collision between a rigid target particle on a surface and a fragile bullet particle moving at a high velocity were analyzed using molecular dynamics simulation. Bullet particles made of $CO_2$ were considered and their size, temperature, and velocity were varied over a wide range. The fraction of kinetic energy transferred from the bullet particle to the target particle was almost independent of the former's size or velocity; however, it was sensitively dependent on its temperature, which can be attributed to the change in the bullet rigidity with temperature. This fraction was nearly twice as high for $CO_2$ bullets as for Ar bullets. This result explains the reason for the more superior cleaning performance of $CO_2$ bullets than Ar bullets with regard to contaminants in the 10 nm size range.
Keywords
MD Simulation; Nano Particles; Fragile Bullet; Kinetic Energy Transfer;
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