Abstract

The gravity wave-model equations are simplifications of the Saint-Venant equations by neglecting the convective term This neglectionis realistic as long as the gravity effect is much more significant than the convective effect in the system In this paper, we present the performance (behaviour) of the standard Lax-Wendroff finite volume method used to solve the gravity wave-model equations. This is the first work in discussing the aforementioned method’s performance in solving the gravity wave-model equations. We obtain that the standard Lax-Wendroff method is suitable for solving problems without discontinuity in the solution. When there is a discontinuity, the standard Lax-Wendroff method produces artificial oscillation in the solution.

Highlights

  • One of mathematical models for free-surface flows is the gravity wave-model equations [1]

  • The Saint-Venant equations consist of two partial differential equations, namely the mass equation and momentum equation [6,7,8]

  • We find that in comparison with the analytical solution, for this discontinuous problem, the Lax-Wendroff finite volume method produces artificial oscillation, no matter how small we take the time step value

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Summary

Related content

- A staggered grid finite difference method for solving the gravity wave-model equations Catharina Mara Apriani and Sudi Mungkasi.

Introduction
Published under licence by IOP Publishing Ltd
The discrete form for the law of massconservation is
Fluid surface
Conclusion
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