Variation of the Low Level Winds During the Passage of a Thunderstorm Gust Front PDF Download
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Author: R. W. Sinclair
Publisher:
ISBN:
Category : Meteorology in aeronautics
Languages : en
Pages : 84
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Book Description
Author: R. W. Sinclair
Publisher:
ISBN:
Category : Meteorology in aeronautics
Languages : en
Pages : 84
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Book Description
Author: A. J. Bedard
Publisher:
ISBN:
Category : Fronts (Meteorology)
Languages : en
Pages : 28
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Book Description
Author: Keith L. Seitter
Publisher:
ISBN:
Category : Atmospheric turbulence
Languages : en
Pages : 34
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Book Description
The thunderstorm gust front is an important feature for both the maintenance and initiation of storms. Previous studies have shown that the thunderstorm outflow producing the gust front can be treated as an atmospheric density current to a good approximation. In this study, a new version of the density current speed equation, based on the surface pressure rise, is derived. This equation is shown to give much better results than other commonly used forms when applied to twenty previously reported gust front observations. A two-dimensional numerical model is used to investigate the dynamics of atmospheric density currents. Simulations with this model show the effects of the environmental wind relative to the storm and the wind shear on the propagation of the gust front and the depth of the thunderstorm outflow. The results of these simulations are discussed in terms of the conditions necessary for the gust front to remain in a position that is beneficial for the maintenance of the storm. Moist processes are included in the model and simulations are made to investigate atmospheric density current propagation through a moist atmosphere. The lifting that occurs during gust front passage is calculated and it is found that even when this lifting is sufficient to bring moist parcels above their level of free convection; deep convection is prohibited by other aspects of the circulation. The generation of an arc cloud by the gust front is found to result in a less intense and slower gust front compared to an outflow that did not produce an arc cloud. This result is interpreted in terms of the gust front speed equation based on the surface pressure rise. (Author).
Author: Emil Simiu
Publisher: John Wiley & Sons
ISBN: 1119375908
Category : Technology & Engineering
Languages : en
Pages : 520
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Book Description
Provides structural engineers with the knowledge and practical tools needed to perform structural designs for wind that incorporate major technological, conceptual, analytical and computational advances achieved in the last two decades. With clear explanations and documentation of the concepts, methods, algorithms, and software available for accounting for wind loads in structural design, it also describes the wind engineer's contributions in sufficient detail that they can be effectively scrutinized by the structural engineer in charge of the design. Wind Effects on Structures: Modern Structural Design for Wind, 4th Edition is organized in four sections. The first covers atmospheric flows, extreme wind speeds, and bluff body aerodynamics. The second examines the design of buildings, and includes chapters on aerodynamic loads; dynamic and effective wind-induced loads; wind effects with specified MRIs; low-rise buildings; tall buildings; and more. The third part is devoted to aeroelastic effects, and covers both fundamentals and applications. The last part considers other structures and special topics such as trussed frameworks; offshore structures; and tornado effects. Offering readers the knowledge and practical tools needed to develop structural designs for wind loadings, this book: Points out significant limitations in the design of buildings based on such techniques as the high-frequency force balance Discusses powerful algorithms, tools, and software needed for the effective design for wind, and provides numerous examples of application Discusses techniques applicable to structures other than buildings, including stacks and suspended-span bridges Features several appendices on Elements of Probability and Statistics; Peaks-over-Threshold Poisson-Process Procedure for Estimating Peaks; estimates of the WTC Towers’ Response to Wind and their shortcomings; and more Wind Effects on Structures: Modern Structural Design for Wind, 4th Edition is an excellent text for structural engineers, wind engineers, and structural engineering students and faculty.
Author: R.E. Munn
Publisher: Springer Science & Business Media
ISBN: 9400909756
Category : Science
Languages : en
Pages : 378
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 758
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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:
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 866
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Book Description
Author: United States. Department of the Air Force
Publisher:
ISBN:
Category : Aeronautics, Military
Languages : en
Pages : 266
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Book Description
Author: United States. National Aeronautics and Space Administration
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 946
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Book Description
Author: Kenneth E. Mitchell
Publisher:
ISBN:
Category : Fronts (Meteorology)
Languages : en
Pages : 124
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Book Description
