American Physical Society;United States: American Physical Society (APS)
摘要:
摘要： This study experimentally investigates the influence of intruder surface roughness in the Brazil nut effect in a quasi-two-dimensional vertical vibration granular bed. The intruder dynamics are determined using a particle-tracking method. The results show that surface roughness has a crucial role in the intruder rise dynamics; a rougher intruder has more difficulty rising in the bed because of higher kinetic energy dissipation. This study determined that penetration length and drag length are reduced and drag is enhanced as intruder surface roughness increases. The exponential decay of the penetration length with vibration frequency is shown. The results also show that at higher dimensionless vibration acceleration and lower vibration frequency the variation in rise time between smooth and rough intruders is negligible. 其他題名： Phys Rev E Stat Nonlin Soft Matter Phys 出版者： United States: American Physical Society (APS) 出版日期： 2012-12-26 出處： Physical Review E, 2012-12, Vol.86 (6), p.061316, Article 061316 識別號： ISSN: 1539-3755 識別號： ISSN: 1550-2376 識別號： EISSN: 1550-2376 識別號： DOI: 10.1103/physreve.86.061316 識別號： PMID: 23367941
