Inscrição na biblioteca: Guest
Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Large Eddy Simulation of Heat Transfer in Boundary Layer and Backstep Flow Using PANS

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.250
pages 216-227

Lars Davidson
Division of Thermo and Fluid Dynamics, Department of Applied Mechanics, Department of Mechanical Engineering, Chalmers University of Technology, Hörsalvagen 7b, SE41296 Göteborg, Sweden


Developing boundary layer flow and the flow over a backward-facing step are studied here. The LRN PANS k−ε [1] and the WALE turbulence model [2] are used as SGS models. The PANS (Partially Averaged- Navier-Stokes) modelling approach [3, 4] is a modified k−ε model that can operate in both RANS and LES mode. An extension of PANS based on a four-equation k−ε−ζ−f model was recently proposed [5]. Synthetic, anisotropic, turbulent fluctuations are prescribed at the inlet to trigger the momentum equations into turbulenceresolving mode. The effect of the amplitude of the synthetic fluctuations is investigated. Different values of fk are used. Two different discretization approaches are compared: 100% central differencing (CDS) or 95% CDS and 5% van Leer second-order bounded upwinding scheme. One 2D RANS simulation using the k−ω SST model is made for the backstep flow. A detailed comparison is made between 2D RANS and PANS including an analysis of the balancing terms in the momentum and temperature equations.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH