THE GEOMETRY OF SMOKE SCREENS

T. K. Sherwood Massachusetts Institute of Technology

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Abstract

Sutton's expressions for diffusion in the lower atmosphere are applied to the prediction of size and shape of areas screened by smoke generators. The equation for gas concentration is integrated with respect to height from ground level and the integral set equal to the minimum smoke density per unit ground area required for screening. The result is an equation for the coordinates of the screened area. The procedure is extended to lines of generators with overlapping smoke clouds. The results are illustrated by numerical examples.

Abstract

Sutton's expressions for diffusion in the lower atmosphere are applied to the prediction of size and shape of areas screened by smoke generators. The equation for gas concentration is integrated with respect to height from ground level and the integral set equal to the minimum smoke density per unit ground area required for screening. The result is an equation for the coordinates of the screened area. The procedure is extended to lines of generators with overlapping smoke clouds. The results are illustrated by numerical examples.

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