Download PDF by Anatolii D. Zimon (auth.): Adhesion of Dust and Powder

By Anatolii D. Zimon (auth.)

ISBN-10: 1461585767

ISBN-13: 9781461585763

ISBN-10: 1461585783

ISBN-13: 9781461585787

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Additional info for Adhesion of Dust and Powder

Example text

1. Interaction between two spherical particles (a) and between a particle and a plane (b). ADHESION, MOLECULAR INTERACTION, AND SURFACE ROUGHNESS 33 of the first body arbitrarily at a particular point (Fig. a), and from this point we will describe a cone with a generatrix R cutting off part of the medium in the second body. 6) where H is the clearance between the condensed bodies and SABC is the surface determining the adhesion interaction of the sphere. If we take into account the mutual energy of all pairs of molecules of elementary volumes of the two bodies (dVI and dV2 ) and if we then integrate Eq.

For individual molecules, the interaction is inversely proportional to H6 and the force to H7 ; for condensed systems, it is proportional to Hand H2 , respectively, for two spherical particles (or a partile and a plane) and to H2 and H3 for two planes. On the basis of Eqs. 26), we can calculate the energy and force of interaction between two bodies as a function of the gap separating them. Apart from Eqs. 26), the energy of molecular interaction can be determined in terms ofthe heat of sublimation [40] .

Coefficient of removal K N: spherical particles ........ irregular particles. . . . . 6 In support of the calculated data on the coefficient of removal, let us turn to experiment. -1m . Coefficient of removal KN .. 0 FUNDAMENTAL CONCEPTS OF PARTICLE ADHESION 21 A comparison of these experimental data with calculations based on probability data for particle detachment and removal indicates that the deviation between calculated and experimental values is no greater than 30%. This provides grounds for the statement that, by the use of the probability method, the coefficient of removal can be determined.

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Adhesion of Dust and Powder by Anatolii D. Zimon (auth.)


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