Optimal multi-block mesh generation for CFD

Zaib Ali*, P. Caleb Dhanasekaran, Paul G. Tucker, Rob Watson, Shahrokh Shahpar

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An assessment of various automatic block topology generation techniques for creating structured meshes has been performed in the first part of the paper. The objective is to find out optimal blocking methods for generating meshes suitable for flow simulations. The comparison has been carried out using an adjoint-based error analysis of the meshes generated by these block topologies. Different objective functions and numerical schemes have been used for this assessment. It is found that, in general, the medial axis-based approaches provide optimal blocking and yields better accuracy in computing the functional of interest. This is because the medial axis-based methods produce meshes which have better flow alignment specially in case of internal flows. In the second part of the paper, the adjoint-based error indicator has been used to adapt the block topology in the regions of large error.

Original languageEnglish
Pages (from-to)195-213
JournalInternational Journal of Computational Fluid Dynamics
Volume31
Issue number4-5
DOIs
Publication statusPublished - 21 Jun 2017

Keywords

  • adjoint-based error analysis
  • automatic blocking
  • distance field/level sets
  • medial axis transform
  • Multi-block structured mesh generation

ASJC Scopus subject areas

  • Computational Mechanics
  • Aerospace Engineering
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering

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