A Three-Point Sixth-Order NonuniformCombined Compact Difference Scheme
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چکیده
A three-point nonuniform combined compact difference (NCCD) scheme with sixth-order accuracy is proposed for numerical models. The NCCD scheme is a generalization of the previously proposed combined compact difference (CCD) scheme with a global Hermitan polynomial spline and has major improved features such as error and computational (CPU) time reduction. For nonperiodic boundaries, additional sixthor fifth-order nonuniform boundary conditions are proposed. The NCCD scheme with either sixthor fifth-order additional boundary conditions can increase the accuracy and decrease the CPU time about 1–2 orders of magnitude, compared to the CCD scheme. c © 1999 Academic Press
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تاریخ انتشار 1998