Effects of out-of-plane shear flows on fast reconnection in a two-dimensional Hall magnetohydrodynamics model

2012 ◽  
Vol 19 (3) ◽  
pp. 032905 ◽  
Author(s):  
Jiaqi Wang ◽  
Chijie Xiao ◽  
Xiaogang Wang
Keyword(s):  
Shear Flows ◽  
Two Dimensional ◽  
Plane Shear ◽  
Out Of Plane ◽  
Fast Reconnection

Asymmetric magnetic reconnection with out-of-plane shear flows in a two dimensional hybrid model

2015 ◽  
Vol 22 (5) ◽  
pp. 052110 ◽  
Author(s):  
Lin Wang ◽  
Xiao-Gang Wang ◽  
Xian-Qu Wang ◽  
Yue Liu
Keyword(s):  
Magnetic Reconnection ◽  
Hybrid Model ◽  
Shear Flows ◽  
Two Dimensional ◽  
Plane Shear ◽  
Out Of Plane

scholarly journals Pack ice as a two-dimensional granular plastic: a new constitutive law

2006 ◽  
Vol 44 ◽  
pp. 317-320 ◽  
Author(s):  
Keguang Wang
Keyword(s):  
Uniaxial Compression ◽  
Constitutive Law ◽  
Flow Rule ◽  
Two Dimensional ◽  
Compression Process ◽  
Plane Shear ◽  
Dilatancy Angle ◽  
Pack Ice ◽  
Shear Process ◽  
Out Of Plane

AbstractThe purpose of this Study is to propose a new constitutive law for pack ice, which is not only capable of Simulating the in-plane Shear and out-of-plane uniaxial compression, but also capable of avoiding overestimating divergence during Shear. The pack ice is treated as a two-dimensional granular plastic, obeying Coulomb’s friction law with a maximum principal Stress limit. During the out-of-plane uniaxial compression process the flow rule is normal, while during the in-plane Shear process the flow rule is coaxial with a linearly varying dilatancy angle describing the divergence. The Strength parameterizations are based on thickness and compactness of the pack ice; weakening or hardening can be achieved through advection and redistribution.

scholarly journals Nonlinear transverse cascade and two-dimensional magnetohydrodynamic subcritical turbulence in plane shear flows

2014 ◽  
Vol 89 (4) ◽  
Author(s):  
G. R. Mamatsashvili ◽  
D. Z. Gogichaishvili ◽  
G. D. Chagelishvili ◽  
W. Horton
Keyword(s):  
Shear Flows ◽  
Two Dimensional ◽  
Plane Shear

Out-of-plane shear and out-of plane Young’s modulus of double-layer graphene

2013 ◽  
Vol 564 ◽  
pp. 37-40 ◽  
Author(s):  
Balázs Hajgató ◽  
Songül Güryel ◽  
Yves Dauphin ◽  
Jean-Marie Blairon ◽  
Hans E. Miltner ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Double Layer ◽  
Young's Modulus ◽  
Plane Shear ◽  
Layer Graphene ◽  
Out Of Plane

Reynolds stresses and mean fields generated by pure waves: applications to shear flows and convection in a rotating shell

2008 ◽  
Vol 602 ◽  
pp. 303-326 ◽  
Author(s):  
E. PLAUT ◽  
Y. LEBRANCHU ◽  
R. SIMITEV ◽  
F. H. BUSSE
Keyword(s):  
Shear Flows ◽  
Rossby Waves ◽  
Zonal Flow ◽  
Quantitative Agreement ◽  
Model Systems ◽  
Geometrical Factor ◽  
Wave Flow ◽  
Nonlinear Frequency ◽  
Two Dimensional ◽  
Reynolds Stresses

A general reformulation of the Reynolds stresses created by two-dimensional waves breaking a translational or a rotational invariance is described. This reformulation emphasizes the importance of a geometrical factor: the slope of the separatrices of the wave flow. Its physical relevance is illustrated by two model systems: waves destabilizing open shear flows; and thermal Rossby waves in spherical shell convection with rotation. In the case of shear-flow waves, a new expression of the Reynolds–Orr amplification mechanism is obtained, and a good understanding of the form of the mean pressure and velocity fields created by weakly nonlinear waves is gained. In the case of thermal Rossby waves, results of a three-dimensional code using no-slip boundary conditions are presented in the nonlinear regime, and compared with those of a two-dimensional quasi-geostrophic model. A semi-quantitative agreement is obtained on the flow amplitudes, but discrepancies are observed concerning the nonlinear frequency shifts. With the quasi-geostrophic model we also revisit a geometrical formula proposed by Zhang to interpret the form of the zonal flow created by the waves, and explore the very low Ekman-number regime. A change in the nature of the wave bifurcation, from supercritical to subcritical, is found.

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