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

EXPERIMENTAL TECHNIQUES FOR THE ANALYSIS OF SINGLE-PHASE FORCED CONVECTION IN MICROCHANNELS

DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf.70
pages 123-141

Gian Luca Morini
Alma Mater Studiorum Universita di Bologna DIN / Scuola di Ingegneria e Architettura, 40136 Bologna, Italy

Abstract

In this paper a review of the main experimental techniques used for the determination of friction factor and convective heat transfer coefficient in microchannels is shown. First of all, the main governing equations useful for the experimental evaluation of friction factor and Nusselt number in microchannels are recalled in order to show the minimum set of physical quantities which need to be measured. A short overview of the experimental techniques able to drive the analysis of convective heat transfer in microdevices is presented by highlighting the measurement techniques developed specifically for microchannels and the specific measurement issues related to the reduced dimensions of the test section. A series of experimental data on friction factor and Nusselt number are presented in order to show the impact of typical measurement mistakes linked to an inaccurate knowledge of the microchannel cross section geometry, to the underestimation of the presence of scaling effects and to the inaccurate design of the test rig.

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