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Title: Mariah: A Dispersion Model For Evaluating Realistic Heavy Gas Spill Scenarios
Author: J. R. Taft, m. S. Ryne, D. A. Weston
Source: American Gas Association 1983
Year Published: 1983
Abstract: A set of primitive equations describing turbulent transport of chemically inert pollutants within an arbitrarily stratified atmosphere is presented. The equations express conservation of mass, energy, and momentum. The dynamic and energetic effects arising from significant concentrations of contaminant are included. The equations have been encoded into computer-based finite difference models, MARIAH/FLASH. The model represents state-of-the-art with typical run costs of 50 to 150. The model is briefly described, followed by a comparison with a 40 m experimental Freon spill from a series conducted by the British Health and Safety Executive. Finally, a sample calculation for a hypothetical spill of LNG is presented.

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