On the Thickness of Smoke Plume in Diabatic Surface Layer

[摘要] The leeward profiles of the thickness of smoke plume emitted from a continuous point source on the ground surface and spreading into diabatic atmospheric surface layer is discussed. The grade of the profile along leeward axis is derived from Lagrangian correlation of vertical fluctuating wind velocity where the grade is considered, namely the root mean square of fluctuating wind velocity at that position, and mean wind velocity. The equation for the root mean square of fluctuating wind velocity under diabatic condition is given in this report from the equation of diabatic wind profile by applying the generalized mixing length theory. Then the theoretical profiles of the smoke plume are compared with experimental and empirical results.

[学科分类] 大气科学