Stability of ADI schemes applied to convection-diffusion equations with mixed derivative terms

Authors:
K. J. in't Hout;B. D. Welfert
Affiliations:
Department of Mathematics and Statistics, Arizona State University, Tempe, Arizona;Department of Mathematics and Statistics, Arizona State University, Tempe, Arizona
Venue:
Applied Numerical Mathematics
Year:
2007

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Abstract

We consider Alternating Direction Implicit (ADI) schemes for the numerical solution of initial-boundary value problems for convection-diffusion equations with cross derivative terms. We derive new linear stability results for three ADI schemes that have previously been studied in the literature. These results are subsequently used to show that the ADI schemes under consideration are unconditionally stable when applied to finite difference discretizations of general parabolic two-dimensional convection-diffusion equations. Supporting numerical evidence is included.