Author: Dean A. WilsonPublisher:
ISBN:
Category : Dynamics of a particle
Languages : en
Pages : 748
Book Description
The Kinematic Behavior of Spherical Particles in an Accelerating Environment
Author: Dean A. WilsonPublisher:
ISBN:
Category : Dynamics of a particle
Languages : en
Pages : 748
Book Description
The Kinematic Behavior of Spherical Particles in an Accelerating Environment
Author: Dean A. WilsonPublisher:
ISBN:
Category : Dynamics of a particle
Languages : en
Pages : 25
Book Description
The Kinematic Behavior of Spherical Particles in an Accelerating Environment
Author: Dean A. Wilson (Geophysicist)Publisher:
ISBN:
Category : Dynamics of a particle
Languages : en
Pages : 25
Book Description
The response of a spherical particle to an accelerating environment is investigated. When the Reynolds numbers associated with such accelerations are small, the particle is in Stokes' regime and the linear equations governing its motion can be solved analytically. Outside Stokes' regime, which is the general case for spheres comparable in size to precipitation particles, the equations are nonlinear and must be solved numerically.The numerical solution indicates that particles of all sizes falling in a sheared environment are excellent tracers of the mean air motion. Even a hailstone as large as 2 cm in diameter falling at its terminal speed can be expected to follow the mean horizontal air speed within +/- 0.5 m sec -1, provided the vertical wind shear is less than 10 -2 sec 1. However, the time response of a spherical particle to a wind gust of constant velocity is quite sensitive to particle size. This response can be approximated by an expression of the form 1 e -t/[tau] where t depends on both particle size and the magnitude of the wind gust. For wind gusts of 1.0 m sec -1, [tau] is seen to vary from less than 10 -5 sec for particles smaller than 0.02 mm in diameter to 2.5 sec for a 2.0-cm hailstone. Also, when a particle is submitted to a substantial wind gust, a significant decrease in its terminal velocity occurs.It is suggested that the response of a nonspherical particle to wind accelerations will be at least as fast as this study indicates for a spherical particle of the same mass .
The Kinematic Behavior of Spherical Particles in an Accelerating Environment
Author: Dean A. WilsonPublisher:
ISBN:
Category : Dynamics of a particle
Languages : en
Pages : 36
Book Description
Collected Reprints
Author: Collected Reprints, 1970-1971
Author: Wave Propagation LaboratoryPublisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 538
Book Description
Business Service Check List
Author: Air Pollution Abstracts
Author: Commerce Today
Author: Monthly Catalog of United States Government Publications
Author: United States. Superintendent of DocumentsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1290
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.