Collision of expanding plasma clouds: Mixing, flow morphology, and instabilities

2020 ◽  
Vol 27 (12) ◽  
pp. 122113
Author(s):  
V. I. Sotnikov ◽  
A. Hamilton ◽  
M. A. Malkov
Keyword(s):  
Flow Morphology

SHORT-TERM EVOLUTION OF FLOW & MORPHOLOGY IN AN ERODIBLE MEANDERING CHANNEL WITH & WITHOUT GROYNES

2018 ◽  
Vol 74 (4) ◽  
pp. I_1147-I_1152
Author(s):  
Saroj KARKI ◽  
Yuji HASEGAWA ◽  
Masakazu HASHIMOTO ◽  
Hajime NAKAGAWA ◽  
Kenji KAWAIKE
Keyword(s):  
Short Term ◽  
Meandering Channel ◽  
Term Evolution ◽  
Flow Morphology

Morphology of Quaternary phonolite lavas from Tenerife, Canary Islands

1970 ◽  
Vol 107 (6) ◽  
pp. 559-560 ◽  
Author(s):  
W. I. Ridley
Keyword(s):  
Canary Islands ◽  
Flow Morphology

SummaryPhonolite lava from the Viejo and Teide volcanoes show a wide variation in flow morphology, from viscous, spoon-shaped lavas to thin flows more than 8km long that often show well developed lava channels. The apparent fluidity of these lavas is considered to be largely due to their strongly alkaline character.

Implications of Contact Line Dynamics on Taylor Bubble Flow Morphology

2010 ◽  
Author(s):  
Alexandru Herescu ◽  
Jeffrey S. Allen
Keyword(s):  
Contact Angle ◽  
Contact Line ◽  
Hydraulic Jump ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Film Deposition ◽  
Hydrophobic Coating ◽  
Glass Capillaries ◽  
Flow Morphology ◽  
Deposited Film

Film deposition experiments are performed in circular glass capillaries of 500 μm diameter. Two surface wettabilities are considered, contact angle of 30° for water on glass and of 105° when a hydrophobic coating is applied. It was observed that the liquid film deposited as the meniscus translates with a velocity U presents a ridge that also moves in the direction of the flow. The ridge is bounded by a contact line moving at a velocity UCL as well as a front of velocity UF, and it translates over the deposited stagnant film. The behavior of the ridge presents striking dissimilarities when the wettability is changed. Both UCL and UF are approximately twice as large for the non-wetting case at the same capillary number Ca. The Taylor bubbles forming due to the growth of the ridge are also differentiated by wettability, being much shorter in the non-wetting case. The dynamics of the contact line is studied experimentally and a criterion is proposed to explain the occurrence of a shock at the advancing front of the ridge. The hydraulic jump cannot be explained by the Froude condition of shock formation in shallow waters, or by an inertial dewetting of the deposited film. For a dynamic contact angle of θd = 6° and according to the proposed criterion, a hydraulic jump forms at the front of the ridge when a critical velocity is reached.

Material Flow Behavior during Friction Stir Welding of Copper and Steel

2011 ◽  
Vol 138-139 ◽  
pp. 842-847 ◽  
Author(s):  
Chun Ping Huang ◽  
Wen Liang Chen ◽  
Li Ming Ke ◽  
Huang Lu
Keyword(s):  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Behavior ◽  
Dissimilar Metals ◽  
Screw Thread ◽  
Friction Stir ◽  
Different Shapes ◽  
Welding Joints ◽  
Flow Morphology ◽  
Main Factor

The joining of dissimilar metals, T2 copper and Q235 mild steel was carried out by friction stir welding. The material flow of different shapes of the probe and different forms of welding joints were studied, the material flow behavior on different locations from the probe was also analyzed. The experimental results showed that the screw thread in probe is the main factor in driving material flow along the thickness direction of the weld during FSW of copper and steel, the flow morphology of the weld is significantly different with vary forms of welding joints, and the material flow on different locations from the probe are quite different from each other. Instantaneous cavity will form at the upper of the weld with the use of left screw thread probe during FSW, and if not promptly and adequate padding, it is prone to appear hole-type defects.

The effect of viscosity on the flow morphology in semidetached binary systems. Results of 3D simulations. II

2000 ◽  
Vol 44 (1) ◽  
pp. 26-35 ◽  
Author(s):  
D. V. Bisikalo ◽  
A. A. Boyarchuk ◽  
O. A. Kuznetsov ◽  
V. M. Chechetkin
Keyword(s):  
Binary Systems ◽  
3D Simulations ◽  
Flow Morphology

A quad-pol radar scattering model for use in remote sensing of lava flow morphology

1989 ◽  
Vol 30 (3) ◽  
pp. 227-237 ◽  
Author(s):  
Bruce A Campbell ◽  
Stanley H Zisk ◽  
Peter J Mouginis-Mark
Keyword(s):  
Remote Sensing ◽  
Lava Flow ◽  
Scattering Model ◽  
Radar Scattering ◽  
Flow Morphology
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