NDLI: Comparative Assessment of Turbulence Models for Unsteady Turbulent Flow Predictions in Single Rod Channel Configuration

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Das, Kaushik Basu, Debashis Painter, Scott Howard, Lane Green, Steve
Copyright Year	2007
Abstract	This paper compares different turbulent models for unsteady flow predictions for axial flow in a single rod channel configuration. The numerical analyses are carried out using the Reynolds Averaged Navier Stokes (RANS) equations and three different turbulent models. The predictions are compared with available experimental results. The three models considered in the present work include the RNG (Renormalization group) k-ε model, the realizable k-ε model, and the Reynolds stress model (RSM). With each model, an unsteady approach commonly referred to as URANS (Unsteady Reynolds Averaged Navier Stokes) solution is used. Predicted results are compared with available experimental results. The predicted time-averaged mean velocity and turbulent stresses are in good agreement with the available experimental results. Flow unsteadiness, which is important for determining heat, momentum, and mass transfer in the gap region, is presented through time histories and spectra of flow and turbulent quantities and their influence on the transportation of fluid across the gap is also explored. The effect of inflow unsteadiness on the solution is explored through comparing the flow field for a constant velocity inlet boundary condition as well as time-varying boundary conditions for the RSM model.
Sponsorship	Fluids Engineering Division
Starting Page	211
Ending Page	224
Page Count	14
File Format	PDF
ISBN	0791842894
DOI	10.1115/FEDSM2007-37457
e-ISBN	0791838056
Volume Number	Volume 2: Fora, Parts A and B
Conference Proceedings	ASME/JSME 2007 5th Joint Fluids Engineering Conference
Language	English
Publisher Date	2007-07-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Turbulence Momentum Unsteady flow Flow (dynamics) Transportation systems Stress Mass transfer Fluids Heat Numerical analysis Spectra (spectroscopy) Reynolds-averaged navier–stokes equations Boundary-value problems Inflow Renormalization (physics) Axial flow
Content Type	Text
Resource Type	Article

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