High-Reynolds-number wall-modelled large eddy simulations of turbulent pipe flows using explicit and implicit subgrid stress treatments within a spectral element solver

Ferrer Vaccarezza, Esteban and Saito, N. and Blackburn, H. M. and Pullin, D. I. (2019). High-Reynolds-number wall-modelled large eddy simulations of turbulent pipe flows using explicit and implicit subgrid stress treatments within a spectral element solver. "Computers & Fluids", v. 191 (n. 15); ISSN 0045-7930. https://doi.org/10.1016/j.compfluid.2019.104239.

Description

Title: High-Reynolds-number wall-modelled large eddy simulations of turbulent pipe flows using explicit and implicit subgrid stress treatments within a spectral element solver
Author/s:
  • Ferrer Vaccarezza, Esteban
  • Saito, N.
  • Blackburn, H. M.
  • Pullin, D. I.
Item Type: Article
Título de Revista/Publicación: Computers & Fluids
Date: 2019
ISSN: 0045-7930
Volume: 191
Subjects:
Freetext Keywords: Turbulent pipe flow; Large eddy simulation; Stretched-vortex model; Chung & Pullin model; Spectral vanishing viscosity (SVV); Wall model; Virtual-wall model
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Matemática Aplicada a la Ingeniería Aeroespacial
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

We present explicit and implicit large eddy simulations for fully developed turbulent pipe flows using a continuous-Galerkin spectral element solver. On the one hand, the explicit stretched-vortex model (by Misra & Pullin [45] and Chung & Pullin [14]), accounts for an explicit treatment of unresolved stresses and is adapted to the high-order solver. On the other hand, an implicit approach based on a spectral vanishing viscosity technique is implemented. The latter implicit technique is modified to incorporate Chung & Pullin virtual-wall model instead of relying on implicit dissipative mechanisms near walls. This near-wall model is derived by averaging in the wall-normal direction and relying in local inner scaling to treat the time-dependence of the filtered wall-parallel velocity. The model requires space-time varying Dirichlet and Neumann boundary conditions for velocity and pressure respectively. We provide results and comparisons for the explicit and implicit subgrid treatments and show that both provide favourable results for pipe flows at Re_τ = 2×10^3 and Re_τ = 1.8×10^5 in terms of turbulence statistics. Additionally, we conclude that implicit simulations are enhanced when including the wall model and provide the correct statistics near walls.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainJC2015-00023UnspecifiedUnspecifiedEstancias de movilidad en el extranjero José Castillejo para jóvenes doctores

More information

Item ID: 67031
DC Identifier: https://oa.upm.es/67031/
OAI Identifier: oai:oa.upm.es:67031
DOI: 10.1016/j.compfluid.2019.104239
Official URL: https://www.sciencedirect.com/science/article/pii/S0045793018305875
Deposited by: Memoria Investigacion
Deposited on: 11 Jan 2022 10:05
Last Modified: 11 Jan 2022 10:05
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