A transient hot-wire cell for thermal conductivity measurements over a wide temperature range

Haran, E N; Wakeham, W. A.

doi:10.1088/0022-3735/15/8/010

Cited by 16 publications

(12 citation statements)

References 12 publications

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“…In a series of earlier publications [l -31 we have reported accurate measurements of the thermal conductivity of several moderately dense gases and gas mixtures near room temperature. The earlier measurements were performed with a transient hot-wire instrument and recently a new thermal conductivity cell for operation over a wide range of temperatures has been developed [4]. The present paper describes the first application of this new cell to measurements of the thermal conductivity of argon, nitrogen and carbon monoxide in the temperature range 300-430 K for pressures up to 10 MPa.…”

Section: Introductionmentioning

confidence: 99%

The Thermal Conductivity of Argon, Nitrogen and Carbon Monoxide in the Temperature Range 300 — 430 K at Pressures up to 10 MPa

Haran¹,

Maitland

Mustafa

et al. 1983

Ber Bunsenges Phys Chem

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Diffusion / Gase / WarmeleitfahigkeitMeasurements of the thermal conductivity of argon, nitrogen and carbon monoxide have been carried out over the temperature range 300 -430 K and at pressures up to 10 MPa in a transient hot-wire apparatus. The measurements on argon confirm that the accuracy of the experimental results is one of ? 0.3%. Substantial differences have been found between the thermal conductivity of nitrogen and carbon monoxide in the limit of zero density. This observation can only be satisfactorily explained by the existence of large differences between the diffusion coefficients for internal energy for the two gases. In turn these results indicate that this functional of the intermolecular pair potential may be particularly sensitive to its non-spherical part. -At elevated densities the temperature independence of the excess thermal conductivity as a function of density is confirmed to a high degree of precision.

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Section: Introductionmentioning

confidence: 99%

The Thermal Conductivity of Argon, Nitrogen and Carbon Monoxide in the Temperature Range 300 — 430 K at Pressures up to 10 MPa

Haran¹,

Maitland

Mustafa

et al. 1983

Ber Bunsenges Phys Chem

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“…Design (b) was a logical improvement step [47][48][49]. The gold spring ensured that the wires were always taut.…”

Section: Period From 1971 To Todaymentioning

confidence: 99%

Historical Evolution of the Transient Hot-Wire Technique

2010

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The paper attempts to describe the historical evolution of the transient hot-wire technique, employed today for the measurement of the thermal conductivity of fluids and solids over a wide range of conditions. Starting from the first experiments with heated wires in 1780 during the discussions of whether gases could conduct heat, it guides the reader through typical designs of cells and bridges, software employed and theory developed, to the modern applications. The paper is concluded with a discussion of the areas of application where problems still exist, and a glimpse of the technique's future.

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“…4 and were initially developed at Brown University and subsequently at Imperial College, London. Figure 4 also contains the instruments subsequently [27][28][29][30].…”

Section: Base Campmentioning

confidence: 99%

“…The entire cycle of the transient heat conduction experiment was performed before convection made a significant contribution to heat transfer and thus overcame the fundamental flaw of the earlier approaches. In the gas phase, measurements of the thermal conductivity of the five noble gases and their mixtures with an accuracy of a few parts in a thousand were conducted over a large pressure range but in a more limited range of temperatures than for the viscosity [32,33]. Nevertheless, the data provided a perfectly adequate basis for the confirmation of the predictive methods based upon kinetic theory [34,35].…”

Section: Base Campmentioning

confidence: 99%

“…4 that was used to measure the thermal conductivity of electrically-conducting liquids. In this instrument, the platinum wire traditionally used in the transient hot-wire method [30] was replaced with tantalum wire that was anodized electrolytically to produce an insulating oxide. This allowed measurements of the transient temperature rise of the metallic element without complicating electrical effects arising from a finite electrical conductivity.…”

Section: Frontier Expansionmentioning

confidence: 99%

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Thermophysical Property Measurements: The Journey from Accuracy to Fitness for Purpose

et al. 2007

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A transient hot-wire cell for thermal conductivity measurements over a wide temperature range

Cited by 16 publications

References 12 publications

The Thermal Conductivity of Argon, Nitrogen and Carbon Monoxide in the Temperature Range 300 — 430 K at Pressures up to 10 MPa

The Thermal Conductivity of Argon, Nitrogen and Carbon Monoxide in the Temperature Range 300 — 430 K at Pressures up to 10 MPa

Historical Evolution of the Transient Hot-Wire Technique

Thermophysical Property Measurements: The Journey from Accuracy to Fitness for Purpose

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