Improvement of fast fluid dynamics with a conservative semi-Lagrangian scheme

Mingang Jin, Qingyan Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Purpose - The purpose of this paper is to develop a simple and efficient conservative semi-Lagrangian scheme (SL) for solving advection equation in fast fluid dynamics (FFD), so FFD can provide fast indoor airflow simulations while preserving conservation for energy and species transport. Design/methodology/approach - This study thus proposed a mass-fixing type conservative SL that redistributes global surplus/deficit on the advected field after performing the standard semi-Lagrangian advection. The redistribution weights were designed to preserve the properties of conservatives and monotonicity. Findings - The effectiveness of the conservative SL was validated with several test cases, and the results show that the proposed scheme is indeed conservative with negligible impact on the accuracy of the standard solutions. The numerical tests show that the proposed scheme was indeed conservative with negligible impact on the accuracy of the flow prediction. Originality/value - The FFD with conservative SL can effectively enforce the energy and species conservation for indoor airflow and predict airflow distributions with reasonable accuracy.

Original languageEnglish
Pages (from-to)2-18
Number of pages17
JournalInternational Journal of Numerical Methods for Heat and Fluid Flow
Volume25
Issue number1
DOIs
Publication statusPublished - 5 Jan 2015

Keywords

  • Conservative semi-Lagrangian
  • Fast fluid dynamics
  • Indoor airflow

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Computer Science Applications
  • Applied Mathematics

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