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Evaluation of the use of the Chebyshev algorithm with the quadrature method of moments for simulating aerosol dynamics
Authors:Rochan R. Upadhyay
Affiliation:Institute for Computational Engineering and Sciences (ICES) , The University of Texas at Austin, 1 University Station, C0200 Austin, TX 78712, USA
Abstract:The quadrature method of moments (QMOM) has been widely used for the simulation of the evolution of moments of the aerosol general dynamic equations. However, there are several shortcomings in a crucial component of the method, the product-difference (P-D) algorithm. The P-D algorithm is used to compute the quadrature points and weights from the moments of an unknown distribution. The algorithm does not work for all types of distributions or for even reasonably high-order quadrature. In this work, we investigate the use of the Chebyshev algorithm and show that it is more robust than the P-D algorithm and can be used for a wider class of problems. The algorithm can also be used in a number of applications, where accurate computations of weighted integrals are required. We also illustrate the use of QMOM with the Chebyshev algorithm to solve several problems in aerosol science that could not be solved using the P-D algorithm.
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