Variational optimization method for calculation of cloud drop growth in an Eulerian drop-size framework

Journal Article · Wed Oct 15 00:00:00 EDT 1997 · Journal of the Atmospheric Sciences

DOI:https://doi.org/10.1175/1520-0469(1997)054<2493:VOMFCO>2.0.CO;2· OSTI ID:589065

Liu, Qingfu; Kogan, Y L; Lilly, D K; Khairoutdinov, M P ^[1]

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1. Univ. of Oklahoma, Norman, OK (United States)

A variational optimization (VO) method that requires specification of only one variable in each bin size for condensation and evaporation calculations in an Eulerian drop-size framework is proposed. The method is tested against the exact solution given by the Lagrangian method using more than 15000 spectra selected from experiments with a three-dimensional large eddy simulation model with explicit microphysics. The results show that the VO method not only conserves the integral parameters of the spectrum, such as drop number, mean radius, liquid water content, and the effective radius, but also provides an accurate calculation of the spectrum itself.

• OSTI ID: 589065
• Journal Information: Journal of the Atmospheric Sciences, Vol. 54, Issue 20; Other Information: PBD: 15 Oct 1997
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CLOUDS
CONDENSATION NUCLEI
DROPLETS
PARTICLE SIZE
DISTRIBUTION FUNCTIONS
MATHEMATICAL MODELS