Ice Crystal Growth in a Dynamic Thermal Diffusion Chamber PDF Download
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Author: Vernon Wilfred Keller
Publisher:
ISBN:
Category : Cloud physics
Languages : en
Pages : 402
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Book Description
Author: Vernon Wilfred Keller
Publisher:
ISBN:
Category : Cloud physics
Languages : en
Pages : 402
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Book Description
Author: Vernon W. Keller
Publisher:
ISBN:
Category : Ice crystals
Languages : en
Pages : 220
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Author: Gerald Douglass Swoboda
Publisher:
ISBN:
Category :
Languages : en
Pages : 139
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Book Description
Ice phase process in supercooled clouds play dominant roles in development of updrafts and downdrafts as well as various forms of precipitation. In a supercooled cloud, an ice phase process begins normally with vapor diffusional growth of ice crystals. Consequently, the vapor diffusional growth of ice crystals is of importance in cloud physics. Starting from the concept of the wedge-shaped ice thermal diffusion chamber of Schaller and Fukuta, where ice crystals can be grown under a range of ice supersaturations at a constant temperature in quiescent, temperature-stratified air, and by considering design and operational limitations, a new wedge-shaped ice thermal diffusion chamber was designed and constructed for this study of ice crystal growth habit and shape instability. This chamber and supporting apparatus define an experimental system capable of adequately controlling the temperature and supersaturation fields around the growing crystal. In addition to the wedge-shaped chamber, apparatus defining this experimental system are the pre-chamber, ice crystal slide mechanism, lateral microscope slide mechanism, sample transfer device, and outer environmental chamber.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 246
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Author: J. Hallett
Publisher:
ISBN:
Category : Ice crystals
Languages : en
Pages : 6
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Book Description
The temperature dependence of the habit of ice crystals growing in a water vapor diffusion chamber is related to the growth rate of ice crystals in a supercooled cloud. The rates of growth occurring between -4 and -6C as needles or between -12 and -16C as dendrites may be in excess of those at intermediate temperatures by as much as a factor of 100. The effect of seeding a supercooled cloud will therefore depend critically on its temperature. Growth of crystals at large supersaturation between -4 and -6C takes places as spikes growing along a direction 25(degrees) to the c axis. These crystals have been observed in the diffusion chamber, and also as frost near hot springs in Yellowstone Park. The molecular processes responsible for these habit changes are discussed.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 538
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 410
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Author: Georg Ritter
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ISBN:
Category :
Languages : en
Pages :
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Author: Alexander William Harrison
Publisher:
ISBN:
Category :
Languages : en
Pages : 111
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Author:
Publisher:
ISBN:
Category : Local transit
Languages : en
Pages : 96
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