The present book contains the papers that have been presented at the IUTAM-Symposium on Atmospheric Dispersion of Heavy Gases and Small Particles, which was held from August 29th to September 2nd 1983 in Scheveningen in The Netherlands. Attendees from many countries were present; 4 review lectures and about 25 research papers were presented. The realization of the symposium was made possible by the support of Delft University of Technology Koninklijke/Shell-Laboratory Amsterdam Prins Maurits Laboratory/Institute for Chemical and Technological Research Royal Netherlands Meteorological Institute. The symposium organization was carried out by the local organi zing committee consisting of F.G.J. Absil - Delft University of Technology G.W. Colenbrander - Koninklijke/Shell-Laboratory Amsterdam G. Ooms - Delft University of Technology G. Opschoor - Prins Maurits Laboratory/Institute for Chemical and Technological Research H. Tennekes - Royal Netherlands Meteorological Institute A.P. van Ulden - Royal Netherlands Meteorological Institute. The work of the organizing committee was supported in many re spects by the sientific committee, which consisted of H. Fiedler - Technische Hochschule Karlsruhe, Fed. Rep. of Germany F.N. Frenkiel - Naval Ship Research and Development Center, Bethesda, Maryland, U.S.A. J.C.R. Hunt - University of Cambridge, England J. Kondo - National Institute for Environmetal Studies, Japan J.L. Lumley - Cornell University, Ithaca, New York, U.S.A.

Inhalt
Atmospheric Dispersion of Heavy Gases and Small Particles.- Dispersion of a Stack Plume Heavier than Air.- Inclusion of Particles in Second-Order Modeling of the Atmospheric Surface Mixed Layer.- Experimental Observations of Entrainment Rates in Dense Gas Dispersion Tests.- Entrainment in Gravity Currents.- The Incorporation of Wind Shear Effects into Box Models of Heavy Gas Dispersion.- Gravity Spreading and Turbulent Dispersion of Pressurized Releases Containing Aerosols.- Simulations and Parameter Variation Studies of Heavy Gas Dispersion Using the Slab Model Condensed.- Application of Advanced Turbulence Models in Determining the Structure and Dispersion of Heavy Gas Clouds.- Recent Results in Simulating LNG Vapor Dispersion over Variable Terrain.- On the Dilution of a Dense Gas Plume: Investigation of the Effect of Surface Mounted Obstacles.- Large Scale Experiments on the Dispersion of Heavy Gas Clouds.- Improved Understanding of Heavy Gas Dispersion and its Modelling.- Effects of a Spill of LNG on Mean Flow and Turbulence under Low Wind Speed, Slightly Stable Atmospheric Conditions.- Temperature Measurements in a Negatively Buoyant Round Vertical Jet Issued in a Horizontal Crossflow.- Gravity Spreading and Air Entrainment by Heavy Gases Instantaneously Released in a Calm Atmosphere.- A Wind Tunnel Model of the Porton Dense Gas Spill Field Trials.- Modelling of Heavy Gas Plumes in a Water Channel.- The Entrainment of Small Particles by a Turbulent Spot.- On a Model for the Turbulent Re-Entrainment of Small Particles.- Observations on the Current Status of Field Experimentation on Heavy Gas Dispersion.- A Probabilistic Model for Dosage.- Maplin Sands Experiments 1980: Interpretation and Modelling of Liquefied Gas Spills onto the Sea.- Monitoring the AtmosphericDiffusion of Puffs and Plumes with Bipolar Space Charge at Small Scale in Wind Tunnels.- Experimental and Theoretical Studies in Heavy Gas Dispersion. Part I. Experiments.- Water Channel Tests of Dense Plume Dispersion in a Turbulent Boundary Layer.- The Dispersion of Slightly Dense Contaminants.- The Initial Development of Gravity Currents from Fixed-Volume Releases of Heavy Fluids.- Some Physical Processes Involved in the Dispersion of Dense Gases.- Gravity Spreading in Dense Gas Dispersion Models.- Experimental and Theoretical Studies in Heavy Gas Dispersion. Part II: Theory.- A New Bulk Model for Dense Gas Dispersion: Two-Dimensional Spread in Still Air.