Download PDF by K. Kesava Rao: An introduction to granular flow

By K. Kesava Rao

ISBN-10: 0521571669

ISBN-13: 9780521571661

The circulate of granular fabrics reminiscent of sand, snow, coal, and catalyst debris is usual incidence in usual and commercial settings. The mechanics of those fabrics isn't good understood. they're very important due to the fact a wide fraction of the fabrics dealt with and-processed within the chemical, metallurgical, pharmaceutical, and nutrients processing industries are granular in nature. This ebook describes the theories for granular move dependent customarily on continuum versions even supposing replacement discrete types also are mentioned in short. the extent is acceptable for complicated undergraduates or starting graduate scholars. The target is to notify the reader approximately saw phenomena, a few to be had types, and their shortcomings and to go to a few concerns that stay unresolved. there's a number of difficulties on the finish of the chapters to motivate exploration, and vast references are given
''This booklet describes the theories for granular circulation dependent usually on continuum types, even though replacement discrete versions also are mentioned in short. the extent is suitable for complex undergraduates or starting graduate scholars. The objective is to notify the reader approximately saw phenomena and a few on hand types and their shortcomings and to go to a few matters that stay unresolved. there's a number of difficulties on the finish of the chapters to inspire exploration, and huge references are given.''--BOOK JACKET.  Read more... conception for sluggish aircraft stream -- move via hoppers -- stream via wedge-shaped bunkers -- idea for gradual three-d move -- stream via axisymmetric hoppers and bunkers -- concept for quick circulate of soft, inelastic debris -- research of speedy stream in basic geometries -- thought for quick move of tough, inelastic debris -- Hybrid theories

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Here ez is a unit vector in the z direction. 12 Cambridge Books Online © Cambridge University Press, 2010 8:10 P1: SFL BOOK1 CUUS109-Rao 978 0 521 57166 1 April 5, 2008 Introduction forces acting on A are its weight Fw , buoyancy Fb , and the interparticle force between A and B. The last involves several types of forces, such as (i) the gravitational force between A and B, which can be neglected for typical grain sizes, (ii) the electrostatic or Coulomb force Fc between charged particles, and (iii) the van der Waals force Fv between A and B.

3). When the air contains moisture, an adsorbed layer of water molecules forms on the surfaces of the particles at a low humidity. At a high humidity, condensation of water leads to the formation of a liquid bridge, provided the particles are not too far apart. The force associated with the liquid bridge is discussed below. 2. Liquid Bridge or Capillary Forces A liquid bridge is a layer of liquid connecting two particles (Fig. 14a). Considering particle B, the surface tension of the air–liquid interface exerts a horizontal force Fh to the left.

The time-averaged charge distribution around a molecule can be either symmetric or asymmetric. The former corresponds to a nonpolar molecule and the latter to a polar molecule. For a polar molecule such as carbon monoxide, the charge distribution is equivalent to two unlike point charges equal in magnitude and separated by some distance. This is called a (permanent) dipole. Interactions between dipoles of two polar molecules give rise to the orientation or Keesom contribution. If a polar molecule is near a nonpolar molecule such as methane or argon, the dipole of the former induces a dipole in the latter, and the interaction between these dipoles provides the induction or Debye contribution.

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An introduction to granular flow by K. Kesava Rao


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