A diagrammatic derivation of (convective) pattern equations

2011 ◽  
Vol 240 (2) ◽  
pp. 150-165 ◽  
Author(s):  
Y.-P. Ma ◽  
E.A. Spiegel
Keyword(s):  
Convective Pattern

scholarly journals Influence of Pilot Gas Composition on Convective Pattern of Weld Pool Surface in Plasma Keyhole Arc Welding

2017 ◽  
Vol 35 (2) ◽  
pp. 98s-102s ◽  
Author(s):  
Van Anh Nguyen ◽  
Shinichi Tashiro ◽  
Bui Van Hanh ◽  
Manabu Tanaka
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Gas Composition ◽  
Pool Surface ◽  
Convective Pattern ◽  
Weld Pool Surface

Dissipative Structures in Demixing Binary Liquid Systems

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1309-1316 ◽  
Author(s):  
Roland Zander ◽  
Michael Dittmann ◽  
Gerhard M. Schneider
Keyword(s):  
Fluid Layer ◽  
Synergetic Effect ◽  
Sample Volume ◽  
Dissipative Structures ◽  
Vertical Temperature ◽  
Convective Structures ◽  
Liquid Systems ◽  
Convective Pattern ◽  
Rayleigh Benard ◽  
Horizontal Fluid Layer

AbstractThe demixing of a horizontal fluid layer of far-critical composition in the presence of a vertical temperature gradient can cause the formation of dissipative structures and thereby lead to a regular distribution of the precipitate. The occurrence of these convective structures is explained with the model of a Rayleigh-Benard instability (RBI) which is driven by parallel gradients of temperature and concentration. The distribution of the precipitate is a synergetic effect of the macroscopic convective pattern and the local action of the Marangoni flow at the surfaces of the drops. If boundary conditions prohibit an RBI, the distribution of the precipitate also becomes inhomogeneous in course of time; however, in this case no regular pattern is observable and the inhomogeneities develop mainly due to the Marangoni convection near the surfaces of the larger drops that have settled at the boundary of the sample volume

scholarly journals Convective Pattern Deformations under Mean Flow Stress

1987 ◽  
Vol 4 (2) ◽  
pp. 253-253 ◽  
Author(s):  
A Pocheau ◽  
V Croquette ◽  
P. Le Gal ◽  
C Poitou
Keyword(s):  
Flow Stress ◽  
Mean Flow ◽  
Mean Flow Stress ◽  
Convective Pattern

Plate tectonics and planetary convection

1976 ◽  
Vol 13 (2) ◽  
pp. 331-340 ◽  
Author(s):  
E. R. Kanasewich
Keyword(s):  
Plate Tectonics ◽  
Circular Plates ◽  
Third Order ◽  
African Plate ◽  
Map Projections ◽  
The North ◽  
The Pacific ◽  
Convective Pattern ◽  
High Degree ◽  
Great Circle Path

A series of azimuthal–equidistant map projections, centered on each of the plates of lithosphere, is used to demonstrate the high degree of ordering and symmetry in the major plates. The Pacific and African plates are approximately circular with a radius of 60°. The entire pattern is dominated by these two major plates, exactly antipodal to one another in the form of a dipole. Between the two 'circular' plates is a ring of elliptical plates with irregular boundaries but a organized geometric interrelationship. The average major and minor axes of the 'elliptical' plates, measured at the center of the earth, are 62° ± 6 °and 30° ± 5°, and the major axes are oriented at angles of 56° ± 3 °to lines joining the center of the African plate. The centers of the 'elliptical' plates are arranged within 6° ± 3 °of a great circle path through the North pole. This organized distribution of the major plates is most likely the result of convection currents involving the entire mantle, from the lithosphere to the core. To a first approximation, the convective pattern may be modelled by a superposition of third order spherical harmonics, P03, P13, and P23 in a pattern that regressed from a first spherical harmonic, −P01.

scholarly journals Spatio-temporal intermittency in a 1D convective pattern: Theoretical model and experiments

1992 ◽  
Vol 55 (3-4) ◽  
pp. 287-308 ◽  
Author(s):  
F. Daviaud ◽  
J. Lega ◽  
P. Bergé ◽  
P. Coullet ◽  
M. Dubois
Keyword(s):  
Theoretical Model ◽  
Convective Pattern ◽  
Spatio Temporal

Convective Pattern in the Dielectric Regime of Electrohydrodynamic Instability

1987 ◽  
Vol 56 (2) ◽  
pp. 502-505 ◽  
Author(s):  
Hideki Yamazaki ◽  
Shoichi Kai ◽  
Kazuyoshi Hirakawa
Keyword(s):  
Electrohydrodynamic Instability ◽  
Convective Pattern
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