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On the Shape and Fall Velocities of Raindrops
Author(s) -
BrazierSmith P. R.,
BrazierSmith P. R.
Publication year - 1992
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49711850607
Subject(s) - mechanics , radius , flow (mathematics) , drop (telecommunication) , meteorology , front (military) , geology , geometry , physics , mathematics , computer science , telecommunications , computer security
A numerical model for the calculation of the shapes and fall velocities of raindrops is presented. Central to the operation of the model is the calculation of the flow over the front portion of the drop. This is done on the basis that the flow in that region is potential and that the surface streamline separates at the waist. In its final form the model predicts fall velocities within 4% of the experimental values for drops of 1 mm radius and greater, and shapes that correspond very closely to observed shapes. the incorporation of electrical forces and their effects are briefly explored.