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  • thermal diffusivity  (8)
  • water  (8)
  • Springer  (16)
  • Blackwell Publishing Ltd
  • Oxford University Press
  • 2000-2004  (6)
  • 1985-1989  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Measurement of Thermal Diffusivity of Thermal Control Coatings by the Flash Method Using Two-Layer Composite Sample1 (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 535-542 
    Details
    ISSN: 1572-9567
    Keywords: flash method ; thermal contact resistance ; thermal control coatings ; thermal diffusivity ; two-layer composite sample
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal diffusivity of brittle coatings cannot be measured by the flash method directly because of the difficulty of preparing free-standing samples. Adopting the flash method using a two-layer composite sample, it is possible to measure thermal diffusivity if the radiant pulse is well defined and good thermal contact on the interface of the composite sample can be ensured. Using an equilateral trapezoidal pulse of an Nd-glass laser measuring the dimensionless temperature history of the rear face of the sample, we determined the thermal diffusivity of thermal control coatings in the temperature range of 80 to 200°C. The results for different thicknesses of substrate showed that the thermal contact resistance of the interface can be neglected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006660318958
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal Diffusivity Measurement of Diamond Films1 (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 479-485 
    Details
    ISSN: 1572-9567
    Keywords: diamond ; film ; flash method ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper discusses the short-pulse-flash method developed for thermal diffusivity measurements on thin films. Two kinds of CVD diamond film have been prepared, and their thermal diffusivity in the perpendicular direction has been measured with this method. The measurement errors caused by the surface coating are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006648016232
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  • 3
    Electronic Resource
    Electronic Resource
    Viscosity of (water + alcohol) mixtures under high pressure (1987)
    Springer
    International journal of thermophysics 8 (1987), S. 147-163 
    Details
    ISSN: 1572-9567
    Keywords: alcohols ; aqueous alcohol solutions ; ethanol ; free-volume theory ; methanol ; 2-methyl-2-propanol ; pressure effect ; propanol ; Tait equation ; t-butyl alcohol ; viscosity ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New experimental viscosity data are presented for aqueous solutions of methanol, ethanol, 1-propanol, 2-propanol, and 2-methyl-2-propanol (t-butyl alcohol) in the temperature range from 283 to 348 K and pressures up to 120 MPa. The viscosity measurements were performed using a falling-cylinder viscometer on a relative basis with an uncertainty of less than 2%. The viscosity of pure alcohols and aqueous solutions is found to increase almost linearly with increasing pressure, whereas that of water decreases slightly with pressure at temperatures below 298 K. As for the composition dependence of the viscosity, a distinct maximum appears near 0.3–0.4 mole fraction of alcohol on all isobars at each temperature. The viscosity maximum shifts gradually to a higher alcohol concentration with increasing temperature and pressure. The isobars of aqueous 2-propanol and 2-methyl-2-propanol solutions have another shallow minimum near 0.9 mole fraction of alcohol below 323 K. The experimental results were analized empirically by a Tait-type equation and a free-volume theory. It was found that the isothermal viscosity data were satisfactorily correlated by these equations as functions of pressure and composition or of density and composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00515199
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  • 4
    Electronic Resource
    Electronic Resource
    A study of cooling water requirements for the protection of metal surfaces against thermal radiation (1989)
    Springer
    Fire technology 25 (1989), S. 213-229 
    Details
    ISSN: 1572-8099
    Keywords: cooling ; water ; fire protection ; thermal radiation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Among the hazards posed to storage tanks by thermal radiation are the effects of changes in the mechanical strength of the metal at high temperatures that may lead ultimately to failure. Alarge-scale experimental study has been made of the water cooling requirements for metal surfaces exposed to thermal radiation. A two meter square radiation furnace and commercial water spray equipment were used in the study, which included trials on both vertical and inclined target surfaces. Water application rates between 1.4 and 10.4 L/min per square meter and incident heat fluxes up to 70 kW per square meter were employed. The experimental work was supported by a theoretical model of the cooling process. The results indicate that a metal plate, exposed to a nearby radiating source, can be kept below the temperature at which its mechanical properties become impaired as long as a water film, of minimal thickness, can be maintained over it.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01039779
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  • 5
    Electronic Resource
    Electronic Resource
    Comparison of the thermal conductivities of water and heavy water (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 663-673 
    Details
    ISSN: 1572-9567
    Keywords: corresponding states ; heavy water ; thermal conductivity ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New measurements of the thermal conductivity of H2O and D2O have been performed from critical temperature up to 510°C and from atmospheric pressure up to 100 MPA. As these measurements have been made with the same cell, a precise analysis of the isotopic effect as a function of temperature and density is possible. Our analysis is presented in terms of corresponding states. It is shown that the critical thermal conductivity excesses for H2O and D2O reduced by their respective background thermal conductivity terms are represented by single reduced isotherms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502398
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  • 6
    Electronic Resource
    Electronic Resource
    Measurement of the surface tensions and the interfacial tensions of n-pentane-water and R 113-water systems (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 409-424 
    Details
    ISSN: 1572-9567
    Keywords: adhesion ; interfacial tension ; n-pentane ; pendant drop method ; R 113 ; spreading coefficient ; surface tension ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The surface and the interfacial tensions of mutually immiscible liquid systems were experimentally studied. The measured systems are n-pentane-water and R 113-water, which are proposed as heat transfer fluids for a direct-contact heat exchanger to be used for geothermal and waste heat recovery plants. The experimental apparatus was constructed based on the principle of the pendant drop method. Measurements were performed in the temperature range from 20 to 150°C. Based on the correlation of the surface and the interfacial tensions, the temperature dependences of the spreading coefficient, the film pressure, and the work of adhesion in each system were calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00513080
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  • 7
    Electronic Resource
    Electronic Resource
    Measurement of the thermal diffusivity of molten KCl up to 1000°C by the forced Rayleigh scattering method (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 923-931 
    Details
    ISSN: 1572-9567
    Keywords: high temperature ; KCl ; molten salts ; forced Rayleigh scattering method ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper describes measurement of the thermal diffusivity of molten KCl in the temperature range from 804 to 1030°C by the forced Rayleigh scattering method. In this contact-free optical measuring technique for the thermal diffusivity of liquids, a sample needs to be colored by the admixture of a dye for suitable absorption of a heating laser beam. The dye substances employed are CoCl2 and NiCl2, which were chosen through the experimental evaluation. The accuracy is estimated to be ±7% for molten KCl colored with NiCl2. The results converted to thermal conductivity show one of the smallest values among other previous data; the difference is a factor of four. The present study demonstrates the promising applicability of the forced Rayleigh scattering method to the measurement of high-temperature molten salts, which has never be attained by other conventional methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133260
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  • 8
    Electronic Resource
    Electronic Resource
    A Method of Determining the Thermophysical Properties and Calorific Intensity of the Organ or Tissue of a Living Body (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 207-215 
    Details
    ISSN: 1572-9567
    Keywords: calorific intensity ; hot probe ; organ or tissue of a living body ; specific heat ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method was developed to determine simultaneously the thermal conductivity, thermal diffusivity, specific heat, and calorific intensity of the organ or tissue of a living body either in vivo or in vitro with a thin hot probe. By using the method, the thermophysical properties and calorific intensities of a human palm and in vivo liver and a kidney, heart, brain, and foreleg and hindleg muscles of an anesthetized canine were measured. It is concluded that there are no significant differences in the thermophysical properties of organ or tissue of a living body either in vivo or in vitro. The measured thermophysical properties are in good agreement with those reported in the literature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006669207551
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  • 9
    Electronic Resource
    Electronic Resource
    Measurement of the Thermal Diffusivity of Metallic Foils and Films by the Photoacoustic Method1 (2000)
    Springer
    International journal of thermophysics 21 (2000), S. 513-524 
    Details
    ISSN: 1572-9567
    Keywords: metal ; microscopic structure ; phase lag ; photoacoustic effect ; thermal diffusivity ; thin layer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal diffusivities of four kinds of metallic foils from 20 to 200μμm in thickness were measured by a photoacoustic method on the basis of the Rosencwaig and Gersho theory. The measured data for continuous foils of uniform microscopic structure almost agreed with the literature values. Measurements were also carried out on two kinds of metallic thin films with of 10μμm thickness produced by sputtering. The difference in thermal diffusivity between the foils and the sputtered films depended on the uniformity of the microscopic structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006656218049
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  • 10
    Electronic Resource
    Electronic Resource
    Viscosity of aqueous solutions of 1,2-ethanediol and 1,2-propanediol under high pressures (1988)
    Springer
    International journal of thermophysics 9 (1988), S. 511-523 
    Details
    ISSN: 1572-9567
    Keywords: aqueous alcohol solution ; ethanediol ; ethylene glycol ; falling-cylinder viscometer ; free-volume theory ; high pressure ; pressure effect ; propanediol ; propylene glycol ; viscosity ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New experimental data on the viscosity of aqueous solutions of 1,2-ethanediol (ethylene glycol) and 1,2-propanediol (propylene glycol) are presented at 298 and 323 K under pressures up to 120 MPa. The measurements were performed by a falling-cylinder viscometer on a relative basis with an uncertainty of less than ±2%. The viscosity of these aqueous solutions at a constant temperature and pressure increases monotonously with increasing concentrations of diols (glycols) and is slightly lower than the mole fraction average value at each composition. The viscosity also increases almost linearly with pressure at a constant temperature and composition. The pressure coefficient of the viscosity, (∂η/∂P)T,x, increases with decreasing temperature and increasing concentrations of diols. The experimental results are correlated with pressure, density, and composition by several empirical equations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503150
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