Download or read book The Dynamics of Non spherical Particles 1 Controlled Generation of Non spherical Aerosols and Methods for Their Size Concentration and Electric Charge Measurement written by Isaiah Gallily and published by . This book was released on 1974 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The typical features of the motion of a nonspherical aerosol particle are discussed, an overall aim concerning its behavior in systems of importance for human environment is stated and a preliminary objective of studying methods for generation, size measurement, determination of concentration and assessment of electric charge is set. Previous investigations in these lines are reviewed. Starting with model shapes, there were produced by solution spray-drying almost perfect cubes or parallelpipeds and, by suspension gas atomization, cylindrical particles of glass fibers. Dispersion of powders by air turbulence was treated theoretically and a computational investigation of the adhesional energy between two parallelpipeds at various mutual orientations begun. The size parameters of the produced particles were determined. A way of assessing the electric charge of a nonspherical particle is analyzed in view of the specificity of its motion and the relation to the principal translational resistances brought out. The effect of Brownian rotation on the translation of an aerosol particle was discussed. An apparatus for the determination of the principal resistances of a nonspherical particle at various Knudsen numbers has been constructed and a mathematical procedure for the elucidation of results developed.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1974 with total page 1456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991-03 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1975 with total page 1262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerosol Measurement written by Pramod Kulkarni and published by John Wiley & Sons. This book was released on 2011-07-12 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerosol Measurement: Principles, Techniques, and Applications Third Edition is the most detailed treatment available of the latest aerosol measurement methods. Drawing on the know-how of numerous expert contributors; it provides a solid grasp of measurement fundamentals and practices a wide variety of aerosol applications. This new edition is updated to address new and developing applications of aerosol measurement, including applications in environmental health, atmospheric science, climate change, air pollution, public health, nanotechnology, particle and powder technology, pharmaceutical research and development, clean room technology (integrated circuit manufacture), and nuclear waste management.
Download or read book The Dynamics of Non Spherical Particles Part II Mobility in Non Orienting Fields written by Isaiah Gallily and published by . This book was released on 1975 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the stochastic nature of the mobility of aerosol particles in non-orienting fields of force. A dynamic model for the interaction between particles' translation and Brownian rotation was assumed and a Monte Carlo method applied to compute the distribution of particles' (verticle) trajectories. The distribution was calculated for several particle shapes, various geometric dimensions, various total times of motion, and various initial orientations. From the calculations it was seen that the aerodynamic diameter is actually a statistical parameter, which should be taken into account. On the experimental side, the principal translational coefficients of cylindrical glass fibers was determined with the aid of a special apparatus and technique. Fibers' dimensions were found according to a previously developed photogrammetric method, employing a scanning electron microscope.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book N A P C A Abstract Bulletin written by United States. Environmental Protection Agency and published by . This book was released on 1971 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Dynamics of Non Spherical Particles written by Isaiah Gallily and published by . This book was released on 1977 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper the aerodynamic translational mobility of nonsphericals was experimentally determined for Knudsen numbers of up to 0.2. The particles were glass cylinders, which represent asbestos fibers and ice needles, and cubes, which represent the primary constituents of metal oxide aggregates. The method of determination and the apparatus used were based on a stereophotography of the trajectories of the particles in still air and a photogrammetric measurement of the (three) dimensions of the particles in a scanning electron microscope. The results for cylinders, compared with continuous fluid theoretical values of the coefficients, show a reasonable correspondence with expectation which even improved when the blunt edge effect of the particles was taken into consideration. However, in the case of cylinders having diameters above 1 micrometers, the experimentally determined coefficients were higher by about 50% than the continuous fluid calculated ones, whereas in the case of cylinders of diameters less than 0.5 micrometers, the determined coefficients were smaller than the calculated values. The resistance coefficients of cubes showed similar tendencies. The deposition of cylindrical particles in still air was studied in a specially constructed sedimentation cell; in this cell, a method for the size distribution analysis of these particles was tried.
Download or read book Air Pollution Abstracts written by and published by . This book was released on 1970 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 1998 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book Nuclear Technology written by and published by . This book was released on 1988 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fundamentals of Aerosol Dynamics written by C. S. Wen and published by World Scientific. This book was released on 1996 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past 30 years, there have been advances in the understanding of multi-particle hydrodynamic interactions in the field of aerosol dynamics. Aerosol dynamics is developing from isolated-particle stage into multi-particle stage. This book reviews these progresses, and the subjects it covers include sedimentation, coagulation, mass or heat transfer, effective viscosity, and the evolution of the size distribution.
Download or read book The Dynamics of Nonspherical Particles IV Deposition of Flow written by Isaiah Gallily and published by . This book was released on 1978 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gravitational deposition of axisymmetrical elongated particles from a laminar flow was studied theoretically and checked experimentally. The rotation of the particles due to the velocity gradients was taken into account. The dependence of the sedimentation characteristics on the initial conditions of motion, the geometric dimensions of the particles and the flow, was investigated. It has been found that the Stokes (or Aerodynamic) Diameter of the particles is not an inherent property but rather a function of the velocity gradients within the flow. This is thought to be significant for the size assessment of nonspherical aerosol particles and its interpretation. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1965 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
