Dissertation/Thesis Abstract

Computational fluid dynamics validation of buoyant turbulent flow heat transfer
by Iverson, Jared M., M.S., Utah State University, 2013, 172; 1550153
Abstract (Summary)

Computational fluid dynamics (CFD) is commonly implemented in industry to perform fluid-flow and heat-transfer analysis and design. Turbulence model studies in literature show that fluid flows influenced by buoyancy still pose a significant challenge to modeling. The Experimental Fluid Dynamics Laboratory at Utah State University constructed a rotatable buoyancy wind tunnel to perform particle image velocimetry experiments for the validation of CFD turbulence models pertaining to buoyant heat-transfer flows. This study validated RANS turbulence models implemented within the general purpose CFD software STAR-CCM+, including the k – ε models: realizable two-layer, standard two-layer, standard low-Re, v2 f, the k- ω models from Wilcox and Menter, and the Reynolds stress transport and Spalart - Allmaras models. The turbulence models were validated against experimental heat flux and velocity data in mixed and forced convection flows at mixed convection ratios in the range of 0.1 ≤ Gr/Re2 ≤ 0.8. The k- ε standard low-Re turbulence model was found most capable overall of predicting the fluid velocity and heat flux of the mixed convection flows, while mixed results were obtained for forced convection.

Indexing (document details)
Advisor: Spall, Robert E.
Commitee: Katz, Aaron, Phillips, Warren F.
School: Utah State University
Department: Mechanical and Aerospace
School Location: United States -- Utah
Source: MAI 52/04M(E), Masters Abstracts International
Subjects: Applied Mathematics, Mechanical engineering
Keywords: Buoyancy, Computational fluid dynamics, Heat transfer, Turbulence, Turbulent flow, Validation
Publication Number: 1550153
ISBN: 9781303641688