Original paper
Modeling artifacts in the simulation of the sedimentation of raindrops with a Quadrature Method of Moments
Jasor, Gary; Wacker, Ulrike; Beheng, Klaus Dieter; Polifke, Wolfgang
Meteorologische Zeitschrift Vol. 23 No. 4 (2014), p. 369 - 385
28 references
published: Sep 26, 2014
published online: Aug 27, 2014
manuscript accepted: Jun 9, 2014
final revised version received: Apr 8, 2014
manuscript revision requested: Apr 8, 2014
manuscript received: Dec 17, 2013
DOI: 10.1127/0941-2948/2014/0590
Open Access (paper may be downloaded free of charge)
Abstract
The Quadrature Method of Moments (QMoM) is applied to a one-dimensional test case for sedimentation of raindrops. Comparison of the results with a reference spectral method exhibits discrepancies (“step patterns”) that must be considered as modeling artifacts. As the QMoM has been demonstrated to be effective and accurate in various contexts, the origin of these artifacts is investigated and found to be related to the transport of the quadrature abscissas. Further test cases are considered to examine the influence of different initial conditions on the development of the modeling artifacts. The study shows that these artifacts are inherent to the application of QMoM in pure sedimentation context.
Keywords
Quadrature Method of Moments • Sedimentation • Raindrops • Modelling artifacts