Results 261 to 270 of about 302,667 (302)

The velocity of dislocations in ice

Philosophical Magazine A, 1991
Abstract The velocities of dislocations in single crystals of ‘pure’ ice between −4 and −39°C have been measured by white radiation topography using synchrotron X-radiation. Dislocations glide on basal planes as straight segments in screw and 60° orientations with velocities directly proportional to stress.
C. Shearwood, R. W. Whitworth
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Critical impact velocity for ice fragmentation

Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2011
The fragmentation process is a main concern in many engineering applications such as preventing flameouts of aircraft engines. The authors of this article are interested in measuring the critical impact velocity for ice fragmentation. Precisely, a dropweight technique was applied to study the ice ball impacts on glass plates. The influence of ice ball
Pierrick Guégan, Ramzi Othman, Daniel Lebreton, Franck Pasco, Philippe Villedieu, Jacques Meyssonnier, Sylvie Wintenberger   +6 more
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Kinematics of Ice Skating at Different Velocities

Research Quarterly. American Alliance for Health, Physical Education and Recreation, 1977
The purpose of the study was to quantify and compare the temporal aspects of the ice skating stride performed at three different velocities. Subproblems were (a) to determine how stride rate and stride length are affected by changes in skating velocity and (b) to ascertain the characteristics of the single and double support phase relationship over ...
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Crack Velocity Measurements in Sea Ice

MRS Proceedings, 1994
AbstractTo study crack dynamics in sea ice fast measurements of ice electrical resistance and an electromagnetic emission (EME) from cracks were used. The sample dimensions ranged from 0.05 to 30 meters. In a laboratory grown fresh water ice crack velocities varied from a few hundreds to a thousand meters per second while in the natural sea ice crack ...
Oleg Gluschenkov, Victor Petrenko
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Directional Solidification with Constant Ice Front Velocity in the Ice‐Templating Process

Advanced Engineering Materials, 2015
An exponential cooling function for the directional solidification of liquids with constant ice front velocities is investigated with respect to an enhanced control over the ice‐templating process. It is mathematically derived and set into relation to other cooling functions found in literature.
Christian Stolze, Tobias Janoschka, Ulrich S. Schubert, Frank A. Müller, Stefan Flauder   +4 more
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Ice dices for monitoring stream surface velocity

Journal of Hydro-environment Research, 2017
Abstract Non-intrusive observations are fundamental to monitor river flows and understand water processes in natural systems. Recently, the introduction of optical methods has fostered the establishment of numerous image-based techniques for characterizing the kinematics of water bodies. However, RGB image-based methods are still severely affected by
Flavia Tauro, Salvatore Grimaldi
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Crack velocities in freshwater and saline ice

Journal of Geophysical Research: Solid Earth, 1996
This paper presents experimental results on both mode 1 and 2 crack velocities measured in a wide variety of ice types, columnar sea ice, columnar lake ice, laboratory‐grown columnar saline ice, and freshwater columnar and granular ice, in the temperature range from −5° to −35°C.
Victor F. Petrenko, Oleg Gluschenkov
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Ice slurry: Pressure drop and deposition velocity

International Journal of Refrigeration, 2007
Ice slurries are used in indirect refrigeration systems. The storage tank of ice slurry systems decreases the maximum required cooling capacity of the equipment and smooths down the installation consumption. An advantage of ice slurry systems compared to chilled water systems is the higher cooling energy that can be delivered to customers using the ...
Wissam Rached, Fréderic Sicard, Alain Lafargue, Delphine Thorel   +3 more
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Simulation of Velocity Profile under Ice Cover

World Environmental and Water Resource Congress 2006, 2006
Based on a k- model and using a finite volume method, a model was developed to simulate the 2-dimensional velocity profile under ice cover. The comparison of the simulated results from this model with the measured data from experiments indicated that the data matched well with each other.
Jun Wang, Hui Fu, Mingkun Yi, Xiaoyan Sun   +3 more
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Ejection velocities of ice fragments in oblique impacts of ice spheres

Advances in Space Research, 1999
Reaccumulation conditions of icy planetesimals in collisional disruption were studied experimentally using a one-stage light gas gun set in a cold room (−18°C). Oblique impacts between ice spheres were used to measure the velocity distributions of fragments. The impact velocities ranged from 170 to 640 m/s, and the projectile-to-target mass ratio was a
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