CHINESE JOURNAL OF COMPUTATIONAL PHYSICS ›› 2017, Vol. 34 ›› Issue (3): 309-319.

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High-order Compact Difference Schemes and Adaptive Method for Singular Degenerate Diffusion-Reaction Equations

GE Yongbin, CAI Zhiquan   

  1. School of Mathematics and Computer Science, Ningxia University, Yinchuan 750021, China
  • Received:2016-03-11 Revised:2016-06-13 Online:2017-05-25 Published:2017-05-25

Abstract: We established a high-order compact scheme on nonuniform grids for singular degenerate diffusion reaction equation. The scheme is second order accuracy in time and third to fourth order accuracy in space. A grid adaptive method is established by using equidistribution principle. Finally,a numerical example with exact solution validates reliability and accuracy of the method. One-dimentional blow up problem was solved with the method.

Key words: singular and degenerate diffusion-reaction equation, adaptive method, nonuniform grid, high order compact scheme, blow up

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