Library Subscription: Guest
ICHMT DL Home Current Year Archives Executive Committee International Centre for Heat and Mass Transfer

Thermal Heat Flux Analysis at the wall of a mixing tee

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1760
pages 1724-1731

Richard J. A. Howard
Dept Fluid Mechanics, Energy and Environment, EDF R&D, Chatou, France

Jean-Marc Ndombo
EDF R&D, Fluid Mechanics, Energy and Environment, 6 Quai Watier, Chatou 78401, France

Stephane Gervais
EDF SEPTEN, Service for Thermal and Nuclear Studies and Projects, 12-14, avenue Dutrievoz, 69628 Villeurbanne cedex, France

Eric Serre
Aix-Marseille Universite, CNRS, Ecole Centrale Marseille, Laboratoire M2P2, Marseille, France


Ogura et al. [8] proposed a method to obtain the heat transfer coefficient between a solid and a fluid from a single time trace of the temperature in the solid combined with a single time trace of the temperature in the fluid. The method combines the power spectral density (PSD) of the two signals to calculate the heat transfer coefficient for different frequencies. This can then be used to evaluate the thermal flux. In this paper, large eddy simulation (LES) of the thermal mixing in the fluid coupled with numerical simulation of the heat transfer in the solid is used to provide the solid and fluid time traces. Since the thermal flux between the solid and the fluid is already explicitly calculated in the computation fluid dynamics (CFD) simulations, it can be used to check the validity of the power density spectral method of Ogura et al. [8]. The results show close agreement although the frequency range of the method is somewhat limited. Differences at low frequencies below 0.4 Hz are primarily due to the lack a sufficiently large statistical sample. At higher frequencies the solid signal is attenuated by the depth of the thermocouple in the solid. For example at a depth of 0.35 mm the highest frequency that is captured to within 15%, is about 6 Hz, at 1.28 mm it is about 1.5 Hz and at 2.13 mm it is about 1 Hz.

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