Numerical simulation of isothermal flow across slant five-tube bundle with spectral element method code NEK5000

Mustafa Alper Yildiz, Yassin Hassan, Haomin Yuan, Elia Merzari

Research output: Contribution to conferencePaperpeer-review

3 Scopus citations

Abstract

Helical coil steam generator (HCSG) is a specific type of shell and tube heat exchanger known for having higher heat transfer coefficient than many other designs. For this reason, they are considered in Small Modular Reactor (SMR) and High Temperature Reactor (HTR) designs. Investigation of flow behavior in HCSGs is important for better design. In this paper we present our study on modeling of the coolant flow in the primary side of the HCSG. We used Nek5000, open source, high-order spectral element CFD code developed in Argonne National Laboratory. Nek5000 accepts only hexahedral mesh, which makes very challenging the meshing process for the complicated HCSG geometry. Tet-to-hex meshing strategy was applied to by-pass the geometric complexities. Tetrahedral mesh was created first, and then each tetrahedral element was converted to four hexahedral elements. Boundary layers were extruded to fit the exact geometry. In this study large eddy simulation (LES) was performed at Reynolds number of 9000 based on the inlet velocity and the tube diameter. The employed sub-grid scale model for the LES relies on explicit filtering.

Original languageEnglish (US)
Pages659-669
Number of pages11
StatePublished - Jan 1 2018
EventInternational Topical Meeting on Advances in Thermal Hydraulics 2018, ATH 2018 - Held in conjunction with the 2018 American Nuclear Society (ANS) Winter Meeting - Orlando, United States
Duration: Nov 11 2018Nov 15 2018

Other

OtherInternational Topical Meeting on Advances in Thermal Hydraulics 2018, ATH 2018 - Held in conjunction with the 2018 American Nuclear Society (ANS) Winter Meeting
CountryUnited States
CityOrlando
Period11/11/1811/15/18

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Nuclear Energy and Engineering
  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Numerical simulation of isothermal flow across slant five-tube bundle with spectral element method code NEK5000'. Together they form a unique fingerprint.

Cite this