Development of an improved spatial reconstruction technique for the HLL method and its applications

Matt-Hew Smith, K. M. Lin, C. T. Hung, Y. S. Chen, J. S. Wu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The integral form of the conventional HLL fluxes are presented by taking integrals around the control volume centred on each cell interface. These integrals are demonstrated to reduce to the conventional HLL flux through simplification by assuming spatially constant conserved properties. The integral flux expressions are then modified by permitting the analytical inclusion of spatially linearly varying conserved quantities. The newly obtained fluxes (which are named HLLG fluxes for clarification, where G stands for gradient inclusion) demonstrate that conventional reconstructions at cell interfaces are invalid and can produce unstable results when applied to conventional HLL schemes. The HLLG method is then applied to the solution of the Euler Equations and Shallow Water Equations for various common benchmark problems and finally applied to a 1D fluid modeling for an argon RF discharge at low pressure. Results show that the correct inclusion of flow gradients is shown to demonstrate superior transient behavior when compared to the existing HLL solver and conventional spatial reconstruction without significantly increasing computational expense.

Original languageEnglish
Pages (from-to)477-493
Number of pages17
JournalJournal of Computational Physics
Volume230
Issue number3
DOIs
Publication statusPublished - 2011 Feb 1

Fingerprint

Fluxes
inclusions
gradients
Euler equations
shallow water
cells
simplification
Discharge (fluid mechanics)
Argon
low pressure
argon
Fluids
fluids
water
Water

All Science Journal Classification (ASJC) codes

  • Numerical Analysis
  • Modelling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

Cite this

Smith, Matt-Hew ; Lin, K. M. ; Hung, C. T. ; Chen, Y. S. ; Wu, J. S. / Development of an improved spatial reconstruction technique for the HLL method and its applications. In: Journal of Computational Physics. 2011 ; Vol. 230, No. 3. pp. 477-493.
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Development of an improved spatial reconstruction technique for the HLL method and its applications. / Smith, Matt-Hew; Lin, K. M.; Hung, C. T.; Chen, Y. S.; Wu, J. S.

In: Journal of Computational Physics, Vol. 230, No. 3, 01.02.2011, p. 477-493.

Research output: Contribution to journalArticle

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