Investigation of turbulence models for a fully-periodic LWR unit-cell in lattice-Boltzmann framework

Tiftikci A., KOCAR C.

PROGRESS IN NUCLEAR ENERGY, cilt.104, ss.160-171, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Derleme
  • Cilt numarası: 104
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.pnucene.2017.09.011
  • Dergi Adı: PROGRESS IN NUCLEAR ENERGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.160-171
  • Anahtar Kelimeler: Lattice-Boltzmann method, Turbulence model, Flow modeling in PWR rod bundle, LARGE-EDDY SIMULATION, NUMERICAL-SIMULATION, FLOW, SQUARE, LES, RANS, RSM
  • Hacettepe Üniversitesi Adresli: Evet

Özet

In this paper, turbulent flow simulations of a typical LWR unit-cell are presented. Three subgrid scale turbulence models (WALE, VLES (k-epsilon) and VLES (k-omega)) have been implemented in open source lattice Boltzmann code Palabos. The Smagorinsky-Lilly model already exists in the code. The simulations also include Smagorinsky-Lilly model results. The standard wall function implementation is made for all turbulence model simulations. The simulation results are compared with the Hooper's experimental data. Additionally, fine grid ANSYS Fluent simulations are performed using WALE turbulence model. The results show that VLES (k-epsilon) and VLES (k-omega) models give better agreement with experimental results even if the grid is intermediate in size. (C)2017 Elsevier Ltd. All rights reserved.