Comparative Radial Heat Flow Method for Thermal Conductivity Measurement of Liquids

Iyengar, Ananth S.; Abramson, Alexis R.

doi:10.1115/1.3084124

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…Alternative static experimental methods include the temperature oscillation method [ 16 , 17 , 28 ], micro-hot-strip method [ 29 ], steady-state cut-bar method [ 30 ], 3-ω method [ 18 , 31 , 32 ], radial heat-flow method [ 33 ], photo-thermal radiometry method [ 34 ], and thermal comparator method [ 19 , 35 ].…”

Section: Other Thermal Measurement Methodsmentioning

confidence: 99%

Experimental and theoretical studies of nanofluid thermal conductivity enhancement: a review

2011

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Nanofluids, i.e., well-dispersed (metallic) nanoparticles at low- volume fractions in liquids, may enhance the mixture's thermal conductivity, knf, over the base-fluid values. Thus, they are potentially useful for advanced cooling of micro-systems. Focusing mainly on dilute suspensions of well-dispersed spherical nanoparticles in water or ethylene glycol, recent experimental observations, associated measurement techniques, and new theories as well as useful correlations have been reviewed.It is evident that key questions still linger concerning the best nanoparticle-and-liquid pairing and conditioning, reliable measurements of achievable knf values, and easy-to-use, physically sound computer models which fully describe the particle dynamics and heat transfer of nanofluids. At present, experimental data and measurement methods are lacking consistency. In fact, debates on whether the anomalous enhancement is real or not endure, as well as discussions on what are repeatable correlations between knf and temperature, nanoparticle size/shape, and aggregation state. Clearly, benchmark experiments are needed, using the same nanofluids subject to different measurement methods. Such outcomes would validate new, minimally intrusive techniques and verify the reproducibility of experimental results. Dynamic knf models, assuming non-interacting metallic nano-spheres, postulate an enhancement above the classical Maxwell theory and thereby provide potentially additional physical insight. Clearly, it will be necessary to consider not only one possible mechanism but combine several mechanisms and compare predictive results to new benchmark experimental data sets.

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Section: Other Thermal Measurement Methodsmentioning

confidence: 99%

Experimental and theoretical studies of nanofluid thermal conductivity enhancement: a review

2011

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“…The main factors that depend on the correctness of the thermal conductivity coefficient measurement by the radial steady-state method [33][34][35][36][37] are the accuracy of the temperature gradient ∆T determining and stability of the measuring cell temperature during the measurement process. In this installation, platinum resistance thermometers with sensitivity to temperature changes ±0.0005K are used to measure the temperature and temperature gradient.…”

Section: Measurement Of Thermal Conductivity Coefficientmentioning

confidence: 99%

Laboratory equipment for practice learning in the framework of educational course “Molecular Physics and Thermodynamics”

Pursky,

Gamaliy,

Demidov

et al. 2023

J. Phys.: Conf. Ser.

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This article presents laboratory equipment for practice learning of physics specialties students in the framework of educational course “Molecular Physics and Thermodynamics”. The presented laboratory equipment allows measuring the temperature dependence of the thermal conductivity coefficient of molecular liquids under atmospheric pressure and saturated vapors pressure in the temperature range from 150K to 400K. A general scheme of the developed experimental setup for measuring the thermal conductivity of liquids by the steady-state method under isobaric condition has been described. The created laboratory setup uses general design solutions of the coaxial cylinder method, preserving its features and measurement precision in general. The measurements are carried out on coaxial-geometry cell under atmospheric pressure. A modified heat potentiometer method with one thermometer was used, which allowed us to minimize the error in the estimation of the thermal conductivity coefficient due to the uncontrollable heat flows and different calibration of thermometers. The total systematic error in the measurement of the molecular liquids thermal conductivity does not exceed 3%. The procedures for direct measurement and calculation of the thermal conductivity coefficient of molecular liquids using the developed laboratory equipment are described.

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“…Za pomocą aparatu rurowego można wyznaczyć przewodność cieplną izolacji rurowych stosowanych w systemach grzewczych [7], niskotemperaturowych [8], instalacjach przemysłowych, wodociągowych, sanitarnych, a także izolacji budowlanych [9]. Istnieją również rozwiązania konstrukcyjne oparte na idei aparatu rurowego, umożliwiające pomiar przewodności cieplnej płynów [10], izolacji proszkowych [11] oraz stopów różnych materiałów [12]. Z kolei w [13] przedstawiono budowę mobilnego stanowiska do wyznaczania strat ciepła w rurociągach niskotemperaturowych na podstawie pomiaru właściwości cieplnych różnego rodzaju izolacji.…”

Section: Wprowadzenieunclassified

“…Wyniki pomiarów sekcji 1. się temperatur, po czym dokonano pomiarów właściwych na sekcji 2. Wykorzystując wzory (7) i (8), obliczono średnią temperaturę na powierzchni zewnętrznej i wewnętrznej izolacji, natomiast za pomocą wzoru(10) określono współczynnik przewodzenia ciepła izolacji sekcji 2. Wyniki pomiarów i obliczeń przedstawiono w tab.…”

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Projekt I Budowa Stanowiska Do Wyznaczania Współczynnika Przewodzenia Ciepła Otulin Izolacyjnych

Tychanicz-Kwiecień¹,

Markowicz²

2020

ZN PRz Mechanika

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Comparative Radial Heat Flow Method for Thermal Conductivity Measurement of Liquids

Cited by 9 publications

References 7 publications

Experimental and theoretical studies of nanofluid thermal conductivity enhancement: a review

Experimental and theoretical studies of nanofluid thermal conductivity enhancement: a review

Laboratory equipment for practice learning in the framework of educational course “Molecular Physics and Thermodynamics”

Projekt I Budowa Stanowiska Do Wyznaczania Współczynnika Przewodzenia Ciepła Otulin Izolacyjnych

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