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  • thermal conductivity
  • Springer  (96)
  • 2020-2024
  • 1985-1989  (96)
  • 1
    Electronic Resource
    Electronic Resource
    Thermal conductivity ofn-Tetracosan around the liquid-liquid transition temperatureT u (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 603-606 
    Details
    ISSN: 1435-1536
    Keywords: n-Tetracosan ; thermal conductivity ; transient hot strip ; liquid-liquid transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Forn-Tetracosan the temperature dependence of the thermal conductivity has been determined between 52 °C and 150 °C by the transient hot strip method. A decreasing thermal conductivity is followed by a constant one forT≳100 °C. The change in slope can be well estimated by using data of Brillouin scattering and specific volume measurements thus confirming the existence of theT u -phenomenon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421896
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  • 2
    Electronic Resource
    Electronic Resource
    Toxic Hazard evaluation of plenum cables (1985)
    Springer
    Fire technology 21 (1985), S. 252-266 
    Details
    ISSN: 1572-8099
    Keywords: Toxic hazard ; cable ; plenum ; fluorinated-ethylene-propylene (FEP) ; polytetrafluoroethylene (PTFE) ; floor-ceiling assembly ; thermal decomposition ; thermal conductivity ; heat transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Code provisions covering the installation of low voltage cables in plenum spaces above suspended ceilings used for environmental air are reviewed. A calculation procedure which could be used to estimate the potential toxicity of the decomposition products from these cables relative to the toxicity of the compartment fire necessary to decompose the cable insulation is presented. These estimates are used in a four-step procedure for estimating Smoke Toxicity Hazard proposed by the NFPA Toxicity Advisory Committee which is described. Example calculations for some typical cases and a discussion of their limitations are included.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01103583
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  • 3
    Electronic Resource
    Electronic Resource
    Fire resistance of wood structures (1985)
    Springer
    Fire technology 21 (1985), S. 34-40 
    Details
    ISSN: 1572-8099
    Keywords: Firesafety ; charcoal layer ; thermal conductivity ; pyrolysis ; oxygen diffusivity ; exothermic oxidation ; combustible gases ; load bearing ; flexural failure ; insulation ; joints
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract Wood as a building material has the disadvantage of being combustible. Consequently wood structures are seen by many as creating an environment less safe than structures built of noncombustible materials such as steel and masonry. However, experience has shown that some wooden structures have a fire resistance comparable, or greater than that of many noncombustible alternatives. Some statistical figures are given comparing wood with other materials. The fire course and the burning mechanisms of wood are briefly discussed, as is the fire resistance of wood structures from different perspectives. Reference is also made to present research work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01095562
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrodynamic correlation functions of hard-sphere fluids at short times (1989)
    Springer
    Journal of statistical physics 57 (1989), S. 595-629 
    Details
    ISSN: 1572-9613
    Keywords: Neutron scattering function ; shear viscosity ; bulk viscosity ; thermal conductivity ; Green-Kubo integrand ; hard-sphere fluid ; short-time expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The short-time behavior of the coherent intermediate scattering function for a fluid of hard-sphere particles is calculated exactly through ordert 4, and the other hydrodynamic correlation functions are calculated exactly through ordert 2. It is shown that for all of the correlation functions considered the Enskog theory gives a fair approximation. Also, the initial time behavior of various Green-Kubo integrands is studied. For the shear-viscosity integrand it is found that at densitynσ3=0.837 the prediction of the Enskog theory is 32% too low. The initial value of the bulk viscosity integrand is nonzero, in contrast to the Enskog result. The initial value of the thermal conductivity integrand at high densities is predicted well by Enskog theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01022824
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental study of the effect of an ultrahigh-frequency electromagnetic field on thermal conductivity of living tissues (1988)
    Springer
    Bulletin of experimental biology and medicine 105 (1988), S. 30-32 
    Details
    ISSN: 1573-8221
    Keywords: thermal conductivity ; ultrahigh-frequency electromagnetic field ; cryonecrosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00835449
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  • 6
    Electronic Resource
    Electronic Resource
    The thermal conductivity of ethane in the critical region (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 409-415 
    Details
    ISSN: 1572-9567
    Keywords: critical region ; ethane ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal conductivity of ethane in the critical region has been measured isochorically at densities up to 1.76 times the critical density and at temperatures down to 0.13 K above the critical temperature. The measurements were performed with a thermal conductivity apparatus based on the parallelplate method. The experimental accuracy was 0.5 to 5%, depending on the distance to the critical point. The experimental results agree well with a recently developed crossover theory for the thermal diffusivity of fluids in the critical region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133537
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  • 7
    Electronic Resource
    Electronic Resource
    A transient hot-wire method for measuring the thermal conductivity of gases and liquids (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 673-686 
    Details
    ISSN: 1572-9567
    Keywords: chlorofluorocarbons ; fluorocarbons ; nitrogen ; thermal conductivity ; toluene ; transient hot-wire method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this paper we describe a version of a transient hot-wire apparatus which employs an integrating digital voltmeter to measure the bridge out-of-balance signal. The integrating period of the voltmeter is variable and is routinely set equal to one 60-Hz power-line cycle, 16.67 ms. Use of measurement or integration periods less than an integral multiple of the power-line period results in substantially more electronic noise and a significant degradation in experimental precision. A correction to the working equation which accounts for the integration of the out-of-balance signal is also presented. The precision of the digital voltmeter used with the apparatus is ±0.1 μV, which translates into an ultimate precision of ±0.03 mK in the measured temperature rise. In practice the precision in the temperature rise is typically ±0.3 mK, which represents a moderate improvement over the precision generally obtained with transient techniques employing automatic bridge balancing schemes. Although the current apparatus is designed principally for measurements of the thermal conductivity of liquids, it can been used for gas-phase measurements, with some decrease in accuracy due to the somewhat larger heat capacity correction which must be applied to the temperature rise measurements. The operation of the instrument was verified by measuring the thermal conductivities of toluene and nitrogen. Preliminary data are presented for the new environmentally acceptable fluorocarbons such as R-134a (CF3CH2F), R-123 (CHCl2CF3), and R-141b (CCl2FCH3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00507988
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  • 8
    Electronic Resource
    Electronic Resource
    A simplified representation for the thermal conductivity of fluids in the critical region (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 417-426 
    Details
    ISSN: 1572-9567
    Keywords: carbon dioxide ; critical phenomena ; ethane ; methane ; thermal conductivity ; thermal diffusivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A practical representation for the critical thermal conductivity enhancement is developed by incorporating a finite cutoff into the asymptotic mode-coupling integrals for the diffusivity associated with the critical fluctuations. This procedure yields a simplified approximation to a more complete nonasymptotic solution of the mode-coupling integrals obtained by us earlier. A comparison is made with thermal conductivity data for carbon dioxide, ethane, and methane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01133538
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  • 9
    Electronic Resource
    Electronic Resource
    The thermal conductivity of propane (1989)
    Springer
    International journal of thermophysics 10 (1989), S. 1013-1027 
    Details
    ISSN: 1572-9567
    Keywords: high pressure ; propane ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents thermal conductivity measurements of propane over the temperature range of 192–320 K, at pressures to 70 MPa, and densities to 15 mol · L−1, using a transient line-source instrument. The precision and reproducibility of the instrument are within ±0.5%. The measurements are estimated to be accurate to ±1.5%. A correlation of the present data, together with other available data in the range 110–580 K up to 70 MPa, including the anomalous critical region, is presented. This correlation of the over 800 data points is estimated to be accurate within ±7.5%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503170
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  • 10
    Electronic Resource
    Electronic Resource
    Thermal conductivity of B2O3 glass under pressure (1985)
    Springer
    International journal of thermophysics 6 (1985), S. 267-273 
    Details
    ISSN: 1572-9567
    Keywords: high pressure ; thermal conductivity ; vitreous boron trioxide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal conductivity, λ, of vitreous boron trioxide was measured, using a hot-wire procedure, from 170 to 570 K and under pressures of up to 1.7 GPa. The thermal conductivity at room temperature and zero pressure was found to be 0.52 W · m−1 · K−1. The values of the logarithmic pressure derivative, g = d(ln λ)/d(ln ρ), where ρ is the density, were found to be 1.1 for uncompacted glass and 0.7 for glass compacted to 1.2 GPa. The variation of λ with temperature at constant density was approximately linear, with a positive slope of 1.38×10−3W·m−1·K−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00522148
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