Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
NUMERICAL EVALUATION OF MENTER'S SST-CC MODEL FOR AN ANNULAR-SECTOR DUCT ROTATING IN PARALLEL MODE
Submission Author:
Vinicius Daroz , PR
Co-Authors:
Vinicius Daroz, Admilson Franco, Eduardo Matos Germer, Diogo B. Pitz
Presenter: Vinicius Daroz
doi://10.26678/ABCM.ENCIT2018.CIT18-0680
Abstract
Turbulence models based on the eddy-viscosity are, by construction, insensitive to rotation, curvature and anisotropy effects. To incorporate their contributions to the flow dynamics, ad-hoc corrections are implemented on the model equations. The correction method considered in this study, considering Menter's SST as base model, consists of multiplying the turbulence kinetic energy production term by a correction factor. The SST model with curvature correction (SST-CC), as it is known, was tested against large-eddy simulation (LES) results for an annular-sector duct rotating in parallel mode. Besides rotation-induced effects, because of the non-circular geometry, the model has also to be able to account for anysotropy effects. The model assertability is inferred by comparing first and second-order mean quantities. Unexpectedly, the preliminary results showed that by activating the curvature correction procedure, the solution ended up in a laminar state, with zero turbulent kinetic energy. The plain SST model, on the other hand, delivered qualitatively good results.
Keywords
SST-CC, curvature correction, annular-sector, LES, SST
