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  • 1
    Electronic Resource
    Electronic Resource
    Investigation of flow and heat transfer in corrugated-undulated plate heat exchangers (2000)
    Springer
    Heat and mass transfer 36 (2000), S. 449-462 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract  An experimental and numerical investigation of heat transfer and fluid flow was conducted for corrugated-undulated plate heat exchanger configurations under transitional and weakly turbulent conditions. For a given geometry of the corrugated plates the geometrical characteristics of the undulated plates, the angle formed by the latter with the main flow direction, and the Reynolds number were made to vary. Distributions of the local heat transfer coefficient were obtained by using liquid-crystal thermography, and surface-averaged values were computed; friction coefficients were measured by wall pressure tappings. Overall heat transfer and pressure drop correlations were derived. Three-dimensional numerical simulations were conducted by a finite-volume method using a low-Reynolds number k–ɛ model under the assumption of fully developed flow. Computed flow fields provided otherwise inaccessible information on the flow patterns and the mechanisms of heat transfer enhancement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002310000106
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental and theoretical study on the radiation of gases containing dust particles (1993)
    Springer
    Heat and mass transfer 28 (1993), S. 185-193 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Es wird die Abschwächung thermischer Strahlung in einer verdünnten Wolke aus pulverisierter Kohle und Asche experimentell und theoretisch für verschiedene Bereiche der Partikelgröße untersucht. Zur Bestimmung des Absorptions- und Emissionsvermögens einer Kohle/Asche-Wolke wird ein empirisch gefundener Ausdruck entwickelt, der außerdem Grundlage eines neuen Nomogramms ist.
    Notes: Abstract The attenuation of thermal radiation within a dilute cloud of pulverised coal and ash is investigated experimentally and theoretically, for different ranges of particle size. An empirical expression is developed for obtaining the absorptivity and emissivity of a coal/ash cloud. A new nomogram is also presented on the basis of this expression.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01541189
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    Paper (German National Licenses)
    Fulltext
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