Abonnement à la biblothèque: Guest
Page d'accueil ICHMT DL Année en cours Archives Comité de direction Centre international pour le transfert de chaleur et de masse

Spectroscopic Determination of the Thermal Diffusivity of Organic Mixtures and Refrigerants

Alfred Leipertz
Lehrstuhl fur Technische Thermodynamik (LTT), Universitat Erlangen-Nurnberg,Am Weichselgarten 8, D-91058 Erlangen, Germany; ESYTEC Energie- und Systemtechnik GmbH Erlangen, Am Weichselgarten 6, D-91058 Erlangen, Germany

G. Wu
Ruhr-Universität Bochum, Institut für Thermo- und Fluiddynamik, Postfach 102148, D-4630 Bochum, FRG

Martin Fiebig
Institut fur Thermo- & Fluiddynamik, Ruhr-Universitat Bochum, Postfach 1021 48, 4630 Bochum 1, GERMANY


The thermal diffusivity of some transparent liquids (pure liquids, e.g., the refrigerant R113, and binary mixtures) has been measured by Rayleigh photon correlation spectroscopy (PCS). This technique is based on Rayleigh scattering from local statistical fluctuations of the fluid density governed by temperature fluctuations in pure liquids and by temperature and concentration fluctuations in liquid mixtures. Working in thermodynamic equilibrium and providing a criterion for the recognition of systematical distortions in the measurement, PCS offers some distinct advantages over the conventional measurement techniques. Additionally, the PCS probe may be used simultaneously for the measurement of the mutual diffusion coefficient in binary mixtures which is necessary in some cases also for the determination of the thermal diffusivity.

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