media archive
Physics Conferences 7th KIAS Conference on Statistical Physics
Loading the player ...
[Talk 20] Scaling concepts for dense granular flows
SPEAKER  |  S. H. Ebrahimnazhad Rahbari
DATE  |  July 6(Wed), 2016
TIME  |  11:20
PLACE  |  Korea Institute for Advanced Study (KIAS), Seoul, Korea
Keyword  |  
Download  |  
ABSTRACT  |  Concept of scaling has been successfully applied to many systems undergoing a secondorder phase transition. Examples include Ising model and percolation. Recently this concept has found applications in systems that are considered as unorthodox topics for standard critical phenomena. As an example, granular materials, such as ping-pong balls and marbles, undergo a second-order like phase transition near their maximal packing point called the random-close packing (RCP). In such systems, shear rate and packing fraction are control parameters and shear stress, pressure, and granular temperature are observable quantities. In a large amount of literature, the latter quantities are collapsed mostly based on their distance from RCP. However, different groups reported different critical points and critical exponents. We perform a careful analysis to pin down the origin of this diversity. We show that there is a large range of different critical points and exponents which give rise to similar data collapses. Moreover, all these data collapses look very pleasant for the naked eye. We establish a robust method to calculate the transition point and derive the critical exponents for sheared dense granular flows. We argue that this method can be applied to any type of phase transition. ΆΣ J. Vollmer, A. A. Saberi, H. Park, and S. H. Ebrahimnazhad Rahbari, In preparation (2016).
  • [Talk 24] Exact stat...
    Gregory Schehr
    July 7(Thu), 2016
  • [Talk 23] Phase equi...
    Julien Tailleur
    July 7(Thu), 2016
  • [Talk 22] Pressure i...
    Yariv Kafri
    July 7(Thu), 2016
  • [Talk 27] Height dis...
    Satya N. Majumdar
    July 7(Thu), 2016
  • [Talk 26] Noninterse...
    Dong Wang
    July 7(Thu), 2016
  • [Talk 18] Evolution ...
    Hyeong-Chai Jeong
    July 6(Wed), 2016
  • [Talk 17] Adaptive w...
    Joachim Krug
    July 6(Wed), 2016
  • [Talk 20] Scaling co...
    S. H. Ebrahimnazhad Rahbari
    July 6(Wed), 2016
  • [Talk 14] Irreversib...
    Erick Lutz
    July 5(Tue), 2016
  • [Talk 12] Efficiency...
    Sang Hoon Lee
    July 5(Tue), 2016
  • [Talk 16] Probabilit...
    Eunghyun Lee
    July 5(Tue), 2016
  • [Talk 11] The Gibbs ...
    Yuto Murashita
    July 5(Tue), 2016
  • [Talk 9] Reconstruct...
    Pik-Yin Lai
    July 5(Tue), 2016
  • [Talk 15] Role of Bi...
    Meesoon Ha
    July 5(Tue), 2016
  • [Talk 8] Does the tr...
    Masaki Sano
    July 5(Tue), 2016
  • [Talk 1] Thermodynam...
    Shin-ichi Sasa
    July 4(Mon), 2016
  • [Talk 7] Universalit...
    Wonmuk Hwang
    July 4(Mon), 2016
  • [Talk 6] Nonequilibr...
    Leihan Tang
    July 4(Mon), 2016
  • [Talk 5] A non-equil...
    Julian Lee
    July 4(Mon), 2016
  • [Talk 4] Dynamical s...
    Yongjoo Baek
    July 4(Mon), 2016
  • [Talk 2] Fluctuation...
    Sanjib Sabhapandit
    July 4(Mon), 2016