Simultaneous measurements of thermal conductivity and thermal diffusivity of liquids under microgravity conditions

Fujii, Minoru; Zhang, X.; Imaishi, Nobuyuki; Fujiwara, S.; Sakamoto, T.

doi:10.1007/bf02575164

Cited by 70 publications

(61 citation statements)

References 4 publications

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“…Some of these issues can be overcome by determining an effective length and diameter for the wire in a fluid/gas of known properties. This approach has also been used successfully in the transient short-hot-wire method [6].…”

Section: Summary and Discussionmentioning

confidence: 99%

“…For high-pressure hydrogen, a small pressure vessel is required for safety and ease of conformity with high-pressure gas regulations. The transient short-hot-wire method [6] overcomes the difficulty of the sample size but for low-density gases the temperature rise of the wire is still strongly influenced by 5 10 50 100 500 1000 It is clear from Fig. 1 that the wire heat capacity is largely responsible for the non-linearity in the three-omega voltage component versus frequency curve and end effects are important in the low-frequency range.…”

Section: Introductionmentioning

confidence: 99%

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A Procedure for Application of the Three-Omega Method to Measurement of Gas Thermal Conductivity

Yusibani

Woodfield²,

Moroe

et al. 2009

JTST

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A non-linear least-squares curve-fitting procedure is proposed to analyze three-omega voltage data from a fine wire in a gas sample using the three-omega method. The method uses both three-omega components of the voltage arising from a sinusoidal heating current to determine the thermal conductivity of the surrounding medium. The proposed procedure is tested against simulated data and some experimental data for air at atmospheric pressure. Treating the technique as an absolute method and assuming a known sample heat capacity, the thermal conductivity of air has been measured at room temperature to within 11% of a reference value. Practical application of the method may require a calibrated effective wire length and wire diameter. An average wire temperature rise of around 10 K to ensure the three-omega components is enough for accurate measurement.

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Section: Summary and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Procedure for Application of the Three-Omega Method to Measurement of Gas Thermal Conductivity

Yusibani

Woodfield²,

Moroe

et al. 2009

JTST

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show abstract

“…Since the detailed principle and procedure of the TSHW technique have been described previously [12][13][14] . The coefficients A and B, the slope and intercept, are determined by the least-squares method for a relevant range of Fourier number corresponding to the measuring periods.…”

Section: Methodsmentioning

confidence: 99%

Measurements of the Effective Thermal Conductivity and Thermal Diffusivity of Nanofluids

Zhang¹,

Fujii

et al. 2006

Jpn. J. Thermophys. Prop.

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This paper reports on the measurements of the effective thermal conductivity and thermal diffusivity of various nanofluids by using the transient short-hot-wire technique. To remove the influences of the static charge and electrical conductance of the nanoparticles on measurement accuracy, the short-hot-wire probes are carefully coated with a pure Al 2 O 3 thin film. Using distilled water and toluene as the standard liquids, the length and radius of the hot wire and the thickness of Al 2 O 3 film are calibrated before and after the coating. The electrical leakage of the short-hot-wire probes is frequently checked, and only those probes coated well are used for measurements. In the present study, the effective thermal conductivities and thermal diffusivities of

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“…Since a detailed description of the principle is given in a previous study [2], its outline will be described below.…”

Section: Principle Of Measurementsmentioning

confidence: 99%

“…The authors have proposed a transient short-hot-wire method [1], developed from the conventional transient hot-wire method, and have confirmed the reliability of the method by conducting simultaneous measurements of the thermal conductivity and thermal diffusivity of liquids such as pure water, toluene, and so on [2]. Further, by coating the short-hot-wire probe (length: 10 mm, diameter: 50 µm to 100 µm, aspect ratio L: 100 to 200) with about a 5-µm-thick film of alumina, the authors have tried to measure the thermal conductivity and thermal diffusivity of electrically conducting and highly corrosive molten salts like Li 2 CO 3 -K 2 CO 3 (70/30 mol%) and Li 2 CO 3 -Na 2 CO 3 (53/47 mol%) [3,4].…”

Section: Introductionmentioning

confidence: 99%

Measurements of thermal conductivity and thermal diffusivity of alternative refrigerants in liquid phase with a transient short‐hot‐wire method

Tomimura

Maki

Zhang

et al. 2004

Heat Trans. Asian Res.

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Simultaneous measurements of thermal conductivity and thermal diffusivity of liquids under microgravity conditions

Cited by 70 publications

References 4 publications

A Procedure for Application of the Three-Omega Method to Measurement of Gas Thermal Conductivity

A Procedure for Application of the Three-Omega Method to Measurement of Gas Thermal Conductivity

Measurements of the Effective Thermal Conductivity and Thermal Diffusivity of Nanofluids

Measurements of thermal conductivity and thermal diffusivity of alternative refrigerants in liquid phase with a transient short‐hot‐wire method

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