Granular Gases in the Staircase Systems: Driven and Suppressed by Intruders.

• Main Authors: Wen-Chin Li, 李文欽
• Other Authors: 陳國慶
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/72463712347966155889

碩士 === 國立臺灣大學 === 應用力學研究所 === 100 === When the granular gas system receives appropriate input energy, it will appear clustering phenomenon. This origin of phenomenon comes from inelastic collisions between particles and particles. We use the temperature of granular gases to define this phenomenon in order to quantify clustering. If (i) an intruder is added into a mono-disperse gas, it will cause the change of clustering phenomenon temperature. In addition, (ii) changing the system barrier height can also lead to the change of particle clustering phenomenon temperature. Therefore, between (i) and (ii) systems there is an equivalent relationship. In order to identify and quantify the equivalent relationship, the two-compartment system was used to explore the effects of different parameters (i)、(ii) on particle distribution of the system. The system particle distribution was used as a standard to search for the equivalent, and this equivalent can be constructed by proposing the ideal of the equivalent barrier height. When an intruder is inserted into a granular gas in the staircase system, the driven and suppressed behavior can be observed. The particles of granular gas in the staircase system will be driven as we add few heavy intruders into the system, and will be suppressed when several light intruders were added. Therefore, particles in the system from the compartment with a lower potential energy were driven to the compartment with a higher potential energy cluster (proportion 80%). This behavior could be applied to drug delivery, purification, semiconductor process and the suspended impurities of industrial removable process.