SEDIMENT TRANSPORT MODEL CONSIDERING UNRESOLVED SCALES OF TURBULENCE IN LARGE-EDDY SIMULATION AND ITS APPLICATION TO LOCAL SCOURING DUE TO RUN-UP TSUNAMI

• NAKAMURA Tomoaki

  Nagoya University

• MIZUTANI Norimi

  Nagoya University

Bibliographic Information

Other Title

• Large-Eddy Simulationにおける漂砂計算への渦の効果の導入と遡上津波による洗掘現象への適用に関する研究

Abstract

  A sediment transport model considering unresolved scales of turbulence in large-eddy simulation (LES) is pro-posed in this study. In the proposed model, an approximate value of an exact flow velocity is calculated from a re-solvable flow velocity in LES, and used in computing a friction velocity. For validation, a three-dimensional two-way coupled fluid-structure-sediment interaction model (FSSM) combined with the proposed model is applied to tsuna-mi-induced local scouring around a square cylinder. The results show that the evolution of a scour hole is predicted reasonably well using the proposed model for coarse numerical cells, and demonstrate the usefulness of the FSSM combined with the proposed model in assessing local scouring under eddy-dominated flow fields.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 67 (2), I_1183-I_1188, 2011

  Japan Society of Civil Engineers

Keywords

• sediment transport
• turbulence
• large-eddy simulation
• three-dimensional coupled fluid-structure-sediment interaction model
• local scouring
• run-up tsunami

Details

• CRID: 1390001205353356800
• NII Article ID: 130004558370
• DOI: 10.2208/jscejoe.67.i_1183
• ISSN: 21854688
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed