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  • 1
    Electronic Resource
    Electronic Resource
    Heat Transfer from Water to Ice by Thermal Convection (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 460-461 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] By submerging a sphere of ice in water of temperature Too ( C.) and studying the gradual decrease of its diameter or its change of weight in the course of time, we have found the experimental points, as shown in the graph. As the phenomenon is evidently related to the anomalous expansion of water, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172460b0
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  • 2
    Electronic Resource
    Electronic Resource
    Analysis of heat-driven oscillations of gas flows (1959)
    Springer
    Flow, turbulence and combustion 8 (1959), S. 1-27 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary In two previous papers the unstable combustion of premixed gases was studied assuming there to be no heat transfer in the burner ports. Generally, however, the walls of the burner ports are rather hot, so that the fluctuating flow through them induces a fluctuating heat transfer from their hot walls to the gas. This effect may influence the stability of the combustion and is therefore studied in the present paper. The fluctuating heat transfer in the burner ports and especially the fluctuations in the temperature of the gas at the exit of the burner ports are related to the fluctuations in velocity by means of transfer functions. The quasi-steady parts of these transfer functions are calculated for fully established flow and varying wall temperature. The complete transfer functions are only calculated for uniform flow through the burner ports. The characteristic equation accounting for heat transfer in the burner ports is derived on the assumptions that the Mach numbers are very low and that the length of the flames is very short. The theory is applied to a simple model of the flow system in the low-frequency region. Some effects induced by the heat transfer in the burner ports are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411735
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  • 3
    Electronic Resource
    Electronic Resource
    Mass transfer in the laminar boundary layer along a flat plate calculated by means of the integral method (1959)
    Springer
    Flow, turbulence and combustion 8 (1959), S. 261-277 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The approximation method propounded by von Kármán and Pohlhausen for hydrodynamic boundary layers has been applied to the calculation of the mass transfer in the laminar boundary layer along a flat plate without longitudinal pressure gradient. The velocity and concentration profiles are represented by polynomials of the 4th degree in terms of the distance from the wall. It is shown that for mass transfer this method leads to a rather complicated system of formulae. The calculations based upon this method are performed for several values of the Schmidt number Sc, viz. for Sc=0.1, 0.6, 1, 2, 5, 10, 50 and 100. The general trend of the results is in accordance with the exact theory. However, it appears that the numerical work involved is extensive and its accuracy disappointing. Furthermore, for Schmidt numbers lower than 1 the approximation method fails at certain negative values of the transfer parameter B.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411754
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  • 4
    Electronic Resource
    Electronic Resource
    Mass transfer in laminar boundary layers calculated by means of a perturbation method (1959)
    Springer
    Flow, turbulence and combustion 8 (1959), S. 237-260 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The macroscopic equations for combined heat and mass transfer discussed in a foregoing paper are simplified and applied to transfer of momentum, heat and mass in laminar boundary layers. The mass transfer is described in a fairly general manner, as was indicated first by Spalding. On the assumption that the Lewis number is unity, the heat transfer is easily related to the mass transfer. This relation is restricted to low values of the Mach number, but it does account for the dependence of the enthalpy on the concentration, the latter effect having been apparently neglected in the literature hitherto. For flat plates the dependence of the Sherwood number on the Schmidt number and on the differences in concentration is investigated, the latter effect being expressed in terms of a dimensionless transfer parameter B. For low values of B the Sherwood number is obtained as an explicit function of the Schmidt number in the range 0.5〈Sc〈∞. Furthermore, the Sherwood number is calculated for large values of the Schmidt number and finite values of B. The results of the calculations are compared with some other calculations found in the literature. It is shown that the approximations used in the present paper result in suitable formulae for rapid calculation of the Sherwood number.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411753
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  • 5
    Electronic Resource
    Electronic Resource
    The macroscopic equations for simultaneous heat and mass transfer in isotropic, continuous and closed systems (1959)
    Springer
    Flow, turbulence and combustion 8 (1959), S. 73-99 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary In the literature concerning the phenomenological theory of heat and mass transfer in multicomponent systems various formulations of the macroscopic equations are found. In order to decide which formulations are correct, a more or less complete survey of the macroscopic equations is given. Since no disagreements exist concerning the ultimate formulation of the equation of motion, special attention is given to the diffusion equations and the thermal energy equation. The ultimate formulation of the latter equation given in the present paper differs in some details from that found in the literature, the difference being caused by the effect of the diffusing heat capacities and by the dependence of the enthalpy on the concentration. In order to find a proper driving force for the mass transfer, use is made of formulae taken from the thermodynamics of irreversible processes. It appears that for binary systems the barycentric description of the diffusion is the most suitable, especially when convection phenomena play an important role. For multicomponent systems it seems better to relate the diffusion fluxes to the activity. In this case Maxwell's diffusion laws are easily obtained, showing that relations, hitherto only derived in a first approximation for ideal gases, are generally valid for ideal as well as non-ideal systems. From the exact relations simplified descriptions of the diffusion may be derived. If it is, for instance, assumed that Maxwell's dirfusion coefficients are all equal and that the system is ideal, then diffusion equations can be derived which are analogous to those for binary systems. In addition, a simplified version of the thermal energy equation is indicated, which differs somewhat from that given by Spalding and Emmons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411741
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  • 6
    Electronic Resource
    Electronic Resource
    Critical remarks on the thickness of dynamic and thermal boundary layers (1959)
    Springer
    Flow, turbulence and combustion 8 (1959), S. 100-104 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411742
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  • 7
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    The macroscopic equations for simultaneous heat and mass transfer in isotropic, continuous and closed systems (1959)
    Springer
    Details
    Publication Date: 1959-01-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 8
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    Mass transfer in laminar boundary layers calculated by means of a perturbation method (1959)
    Springer
    Details
    Publication Date: 1959-01-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 9
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    Analysis of heat-driven oscillations of gas flows (1957)
    Springer
    Details
    Publication Date: 1957-07-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 10
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    Mass transfer in the laminar boundary layer along a flat plate calculated by means of the integral method (1959)
    Springer
    Details
    Publication Date: 1959-01-01
    Print ISSN: 1386-6184
    Electronic ISSN: 1573-1987
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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