Download Aerosol Measurement: Principles, Techniques, and by Pramod Kulkarni, Paul A. Baron, Klaus Willeke PDF

By Pramod Kulkarni, Paul A. Baron, Klaus Willeke

Aerosol dimension: rules, innovations, and purposes 3rd version is the main unique remedy on hand of the newest aerosol size tools. Drawing at the information of diverse professional members; it offers an excellent clutch of size basics and practices a large choice of aerosol applications.

This re-creation is up to date to deal with new and constructing functions of aerosol dimension, together with purposes in environmental well-being, atmospheric technological know-how, weather swap, pollution, public wellbeing and fitness, nanotechnology, particle and powder expertise, pharmaceutical learn and improvement, fresh room know-how (integrated circuit manufacture), and nuclear waste management.

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1 31 32 32 33 33 33 33 33 33 34 34 34 INTRODUCTION Aerosols, by their nature, are somewhat unstable in the sense that concentration and particle properties change with time. These changes can be the result of external forces, such as the loss of larger particles by gravitational settling, or they may be the result of physical and chemical processes that serve to change the size or composition of the particles. This chapter addresses the latter category of processes. They all involve mass transfer to or from a particle.

1990. Momentum slip correction factor for small particles in nine common gases. J. Aerosol Sci. 21: 161– 168. Sartor, J. , and C. E. Abbott. 1975. Prediction and measurement of the accelerated motion of water drops in air. J. Appl. Meteor. 14(2): 232 –239. Schlichting, H. 1979. Boundary-Layer Theory. New York: McGraw Hill. Tsai, C. , and D. Y. H. Pui. 1990. Numerical study of particle deposition in bends of a circular cross-section –laminar flow regime. Aerosol Sci. Technol. 12: 813–831. , and K.

The flow Reynolds number exceeds 4000, indicating turbulent flow in the ventilation duct. The particle Reynolds number is less than one, indicating the flow around the particle can be laminar. However, it is not in this case because the gas flow is turbulent. 5 Boundary Layer A boundary layer in a flow is defined as a region near a boundary, usually a solid surface, where the influence of fluid viscosity is particularly important. The fluid velocity must fall to zero at the boundary itself. When flow starts along a surface, either in time or space, the boundary layer consists only of the gas at the surface, where the relative velocity is zero.

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