Доступ предоставлен для: Guest
Главная ICHMT DL Текущий год Архив Исполнительный Комитет ICHMT

The Computation of Convective Heat Transfer in a 180-Degree Pipe Bend

DOI: 10.1615/ICHMT.1994.IntSympHetatTransTurb.370
pages 541-552

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

Brian E. Launder
School of Mechanical, Aerospace & Civil Engineering, The University of Manchester, PO Box 88, Manchester M60 1QD, UK


The paper presents computations of turbulent flow and heat transfer in a 180° circular-sectioned bend at a Reynolds number of 58,000. Fully developed pipe flow conditions prevail upstream of the bend entry. The aim is to examine the performance of near-wall models of turbulent heat and momentum transport in a strongly three-dimensional flow with severe streamline curvature. A finite-volume solver is used which employs an algebraic second-moment (ASM) model of turbulence within the fully turbulent region of the pipe. Across the near-wall sublayer two different turbulence models have been applied: a two-equation eddy viscosity model and an ASM scheme. The predicted local Nusselt number is particularly sensitive to the near-wall turbulence model. With the k-ε scheme, entry effects are correctly simulated but the heat transfer rates over the second half of the bend are substantially underpredicted. Use of the ASM scheme results in a significant improvement of the predicted heat-transfer rates.

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