scholarly journals Scaling laws for the linear theta pinch: a comparison of magnetic and laser heating

1973 ◽  
Author(s):  
W.R. Ellis ◽  
G.A. Sawyer
Keyword(s):  
Laser Heating ◽  
Scaling Laws ◽  
Theta Pinch

Strong axial laser heating of a theta‐pinch plasma

1973 ◽  
Vol 23 (12) ◽  
pp. 693-695 ◽  
Author(s):  
Alan L. Hoffman
Keyword(s):  
Laser Heating ◽  
Pinch Plasma ◽  
Theta Pinch

Axial laser heating of small‐diameter theta‐pinch plasmas

1978 ◽  
Vol 33 (4) ◽  
pp. 282-284 ◽  
Author(s):  
A. L. Hoffman ◽  
D. D. Lowenthal ◽  
E. A. Crawford
Keyword(s):  
Laser Heating ◽  
Small Diameter ◽  
Theta Pinch

Axial laser heating of three meter theta pinch plasma columns

1980 ◽  
Vol 23 (10) ◽  
pp. 2066 ◽  
Author(s):  
A. L. Hoffman ◽  
D. D. Lowenthal
Keyword(s):  
Laser Heating ◽  
Pinch Plasma ◽  
Theta Pinch

Siphon Flows in Stratified Coronal Loops

1994 ◽  
Vol 144 ◽  
pp. 185-187
Author(s):  
S. Orlando ◽  
G. Peres ◽  
S. Serio
Keyword(s):  
Heat Flux ◽  
Scaling Laws ◽  
Flow Model ◽  
Supersonic Flows ◽  
Coronal Loops ◽  
Characteristic Parameters

AbstractWe have developed a detailed siphon flow model for coronal loops. We find scaling laws relating the characteristic parameters of the loop, explore systematically the space of solutions and show that supersonic flows are impossible for realistic values of heat flux at the base of the upflowing leg.

Equilibrium scaling laws for layered spin glasses

1993 ◽  
Vol 3 (10) ◽  
pp. 2041-2062 ◽  
Author(s):  
M. J. Thill ◽  
H. J. Hilhorst
Keyword(s):  
Spin Glasses ◽  
Scaling Laws ◽  
Layered Spin

Analysis of shear bands in slow granular flows using a frictional Cosserat model

2000 ◽  
Vol 627 ◽  
Author(s):  
Prabhu R. Nott ◽  
K. Kesava Rao ◽  
L. Srinivasa Mohan
Keyword(s):  
Scaling Laws ◽  
Shear Bands ◽  
Shear Layers ◽  
Theoretical Description ◽  
Field Variable ◽  
Cosserat Continuum ◽  
Momentum Balance ◽  
Rigid Plastic ◽  
Independent Field ◽  
Cosserat Model

ABSTRACTThe slow flow of granular materials is often marked by the existence of narrow shear layers, adjacent to large regions that suffer little or no deformation. This behaviour, in the regime where shear stress is generated primarily by the frictional interactions between grains, has so far eluded theoretical description. In this paper, we present a rigid-plastic frictional Cosserat model that captures thin shear layers by incorporating a microscopic length scale. We treat the granular medium as a Cosserat continuum, which allows the existence of localised couple stresses and, therefore, the possibility of an asymmetric stress tensor. In addition, the local rotation is an independent field variable and is not necessarily equal to the vorticity. The angular momentum balance, which is implicitly satisfied for a classical continuum, must now be solved in conjunction with the linear momentum balances. We extend the critical state model, used in soil plasticity, for a Cosserat continuum and obtain predictions for flow in plane and cylindrical Couette devices. The velocity profile predicted by our model is in qualitative agreement with available experimental data. In addition, our model can predict scaling laws for the shear layer thickness as a function of the Couette gap, which must be verified in future experiments. Most significantly, our model can determine the velocity field in viscometric flows, which classical plasticity-based model cannot.

Magnetic probe measurments on a Theta pinch discharge

1962 ◽  
Vol 9 (2) ◽  
pp. 148-166
Author(s):  
Izumi Hayashi ◽  
Yoshibumi Senoo
Keyword(s):  
Magnetic Probe ◽  
Theta Pinch
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