An improved weighted essentially non-oscillatory scheme with a new smoothness indicator

  • Authors:

  • Youngsoo Ha;Chang Ho Kim;Yeon Ju Lee;Jungho Yoon

  • Affiliations:

  • National Institute for Mathematical Sciences, Daejeon 305-811, Republic of Korea;Department of Computer Engineering, Glocal Campus, Konkuk University, 380-701 Chungju, Republic of Korea;Institute of Mathematical Sciences, Ewha W. University, Seoul 120-750, Republic of Korea;Department of Mathematics, Ewha W. University, Seoul 120-750, Republic of Korea

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2013

Quantified Score

Hi-index 31.45

Visualization

Abstract

In this paper, we present a new smoothness indicator that evaluates the local smoothness of a function inside of a stencil. The corresponding weighted essentially non-oscillatory (WENO) finite difference scheme can provide the fifth convergence order in smooth regions, especially at critical points where the first derivative vanishes (but the second derivatives are non-zero). We provide a detailed analysis to verify the fifth-order accuracy. Some numerical experiments are presented to demonstrate the performance of the proposed scheme. We see that the proposed WENO scheme provides at least the same or improved behavior over the fifth-order WENO-JS scheme [10] and other fifth-order WENO schemes called as WENO-M [9] and WENO-Z [2], but its advantage seems more salient in two dimensional problems.