國立高雄大學圖資館 |

Language: English

Back

Computer simulations of athermal and...

Xu, Ning.

Computer simulations of athermal and glassy systems.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Computer simulations of athermal and glassy systems.
Author:	Xu, Ning.
Description:	132 p.
Notes:	Director: Corey S. O'Hern.
Notes:	Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6037.
Contained By:	Dissertation Abstracts International66-11B.
Subject:	Physics, Condensed Matter.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3194727
ISBN:	9780542395079

Computer simulations of athermal and glassy systems.
Xu, Ning.

Computer simulations of athermal and glassy systems. - 132 p.

Director: Corey S. O'Hern.

Thesis (Ph.D.)--Yale University, 2005.

In the first project, we decomposed the probability distribution P(&phis;) of finding a collectively jammed state at packing fraction &phis; into two distinct contributions: the density of CJ states rho(&phis;) and their basins of attraction beta(&phis;). In bidisperse systems, it is likely that rho(&phis;) controls the shape of P(&phis;) in the large system size limit, and thus the most likely random jammed state may be used as a protocol independent definition of random close packing in this system.

ISBN: 9780542395079Subjects--Topical Terms:

226939
Physics, Condensed Matter.

Computer simulations of athermal and glassy systems.
LDR:02925nmm _2200301 _450 001 170953
005 20061228142330.5
008 090528s2005 eng d
020 $a 9780542395079
035 $a 00242983
040 $a UnM $c UnM
100 0 $a Xu, Ning. $3 244984
245 1 0 $a Computer simulations of athermal and glassy systems.
300 $a 132 p.
500 $a Director: Corey S. O'Hern.
500 $a Source: Dissertation Abstracts International, Volume: 66-11, Section: B, page: 6037.
502 $a Thesis (Ph.D.)--Yale University, 2005.
520 # $a In the first project, we decomposed the probability distribution P(&phis;) of finding a collectively jammed state at packing fraction &phis; into two distinct contributions: the density of CJ states rho(&phis;) and their basins of attraction beta(&phis;). In bidisperse systems, it is likely that rho(&phis;) controls the shape of P(&phis;) in the large system size limit, and thus the most likely random jammed state may be used as a protocol independent definition of random close packing in this system.
520 # $a In the fourth project, we measured the effective temperature defined from equilibrium fluctuation-dissipation relations in athermal and glassy systems sheared at constant pressure. We found that the effective temperature is strongly controlled by pressure in the slowly sheared regime. Thus, this effective temperature and pressure are not independent variables in this regime.
520 # $a In the second project, we measured the yield stress in two different ensembles: constant shear rate and constant stress. The yield stress measured in the constant stress ensemble is larger than that measured in the constant shear rate ensemble, however, the difference between these two measurements decreases with increasing system size.
520 # $a In the third project, we investigated under what circumstances nonlinear velocity profiles form in frictionless granular systems undergoing boundary driven planar shear flow. Nonlinear velocity profiles occur at short times, but evolve into linear profiles at long times. Nonlinear velocity profiles can be stabilized by vibrating these systems. The velocity profile can become highly localized when the shear stress of the system is below the constant force yield stress, provided that the granular temperature difference across the system is sufficiently large.
520 # $a We performed extensive molecular dynamics simulations to better understand athermal and glassy systems near jamming transitions. We focused on four related projects.
590 $a School code: 0265.
650 # 0 $a Physics, Condensed Matter. $3 226939
690 $a 0611
710 0 # $a Yale University. $3 212430
773 0 # $g 66-11B. $t Dissertation Abstracts International
790 $a 0265
790 1 0 $a O'Hern, Corey S., $e advisor
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://libsw.nuk.edu.tw:81/login?url=http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3194727 $z http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3194727