A modified boundary condition of velocity for continuity equation with non-uniform density distribution at outlet boundary plane

Satoki Yokoi, Yoshiya Matsukawa, Yasuhiro Saito, Yohsuke Matsushita, Hideyuki Aoki, Weeratunge Malalasekera

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Boundary conditions in computational fluid dynamics significantly affect the prediction of flow fleld. However, the outlet boundary conditions for the continuity equation have been rarely investigated. In addition, the velocities at the outlet boundary might not be accurately predicted with the conventional outlet boundary conditions when a flow that has non-uniform density distribution on the outlet boundary is simulated. In the present study, we modified a boundary condition for the continuity equation in consideration of the non-uniform density distribution on the outlet boundary plane, comparing the numerical results of combustion between the conventional and modified boundary conditions. As a result, the proposed boundary condition can resist the generation of an unrealistic temperature field better than the conventional methods.

Original languageEnglish
Pages (from-to)641-645
Number of pages5
JournalJOURNAL of CHEMICAL ENGINEERING of JAPAN
Volume51
Issue number8
DOIs
Publication statusPublished - 2018 Aug 20

Keywords

  • Collocated Grid
  • Finite Volume Method
  • Outflow Boundary Condition
  • Unsteady State

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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