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  • 1
    Electronic Resource
    Electronic Resource
    An analysis of the effect of the solid layer for the modified chemical vapor deposition process (1993)
    Springer
    Heat and mass transfer 28 (1993), S. 169-176 
    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 wurde das Wärmeübergangsproblem beim modifizierten chemischen Aufdampfprozeß untersucht, und zwar im Hinblick auf die Einflüsse bezüglich Feststoffdichtdicke, Brennergeschwindigkeit und Rohrrotation. Die Lösung der quasistationären dreidimensionalen Energiegleichungen für die Temperaturfelder im Gas und in der Feststoffschicht erfolgte unter Ausprägung einer Gaußschen Wärmefluß-Randbedingung am Außenumfang. Von besonderem Interesse ist der Einfluß der Feststoffschichtdicke und der Brennergeschwindigkeit auf die Temperaturverteilung am Innenumfang, die Gastemperatur und die Thermophoresegeschwindigkeit. Starke Änderungen der achsialen Temperaturverteilung am Innenumfang resultieren sowohl aus verschiedenen Feststoffschichtdicken wie Brennergeschwindigkeiten. Zunehmende Schichtdicke und Rohrrotation reduzieren den Einfluß ungleichförmiger Aufheizung durch den Brenner in Umfangrichtung und bewirken dort eine sehr gleichförmige Oberflächentemperatur.
    Notes: Abstract The heat transfer problem relative to the modified chemical vapor deposition process has been analyzed and the effects of solid layer thickness, torch speed and tube rotation are studied. The quasi-steady three-dimensional energy equations have been solved for the temperature fields in the gas and the solid layer with a Gaussian heat flux boundary condition on the outer surface. Of particular interest is the effect of the solid layer thickness and the torch speed on inner surface temperature, gas temperature and thermophoretic velocity. The large change of the axial temperature distribution of the surface occurs for different solid layer thicknesses or torch speeds. The presence of the solid layer and tube rotation reduce the effects of nonuniform torch heating in the circumferential direction and the resulting surface temperatures are very uniform in this direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01541187
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  • 2
    Electronic Resource
    Electronic Resource
    Two dimensional analysis of transient flow and heat transfer in a natural circulation loop (1984)
    Springer
    Heat and mass transfer 18 (1984), S. 89-98 
    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 Instationärer Wärmeübergang, Strömungs- und Druckverlauf wurden in einem laminaren Naturkonvektionskreislauf untersucht. Die meisten Arbeiten auf diesem Gebiet basieren auf einer eindimensionalen Näherungslösung, die Kenntnis des Reibungs- und Wärmeübergangskoeffizienten voraussetzt. Die vorliegende Arbeit beschreibt die Änderung des Reibungs- und Wärmeübergangskoeffizienten. Sie zeigt die einzelnen Druck-, Temperatur- und Geschwindigkeitsverläufe auf.
    Notes: Abstract The transient heat transfer, fluid flow and pressure in a natural circulation loop have been studied under laminar flow conditions. Most studies of these systems have utilized a onedimensional approach which requires a priori specifications of the friction and the heat-transfer coefficients. In the present work the variation of the friction and heat-transfer coefficients are determined. Detailed pressure, temperature and velocity distributions are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01006604
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  • 3
    Electronic Resource
    Electronic Resource
    Measurements in a natural convection loop (1987)
    Springer
    Heat and mass transfer 21 (1987), S. 277-282 
    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 über Messungen der Fluid-Temperatur in einem mit freier Konvektion stationär betriebenen Kreislauf berichtet. Die Messungen wurden bei leichten Fluktuationen an einem toroidalen Thermosyphon mit vertikaler beheizter Platte durchgeführt, bei dem die untere Hälfte beheizt und die obere gekühlt war. Die Temperaturenmessungen wurden über den Rohrdurchmesser am Eintritt und Austritt der beheizten Strecke für Wärmestromdichten von 1400-8410 w/m2 durchgeführt. Die Amplituden der Temperaturfluktuationen überstiegen 10 K in der Nähe der inneren Wand und zeigten dabei Rezirkulationseffekte der Strömung am Eintritt des beheizten und des gekühlten Abschnitts an.
    Notes: Abstract Fluid temperature measurements are reported for a natural convection loop operating in the steady state regime. Averaged and fluctuating measurements were made for a toroidal thermosyphon oriented in the vertical plane that was heated over the lower half and cooled over the upper half. The measurements were made along the tube diameter at the entrance and exit of the heating sections for heat inputs from 1400 to 8410 w/m2. The amplitude of the temperature fluctuations exceeded 10 °C near the inner walls indicating the effects from recirculating flow regions at the entrances to the heating and cooling sections.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009288
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  • 4
    Electronic Resource
    Electronic Resource
    Laminar convection with an absorbing and emitting gas (1975)
    Springer
    Flow, turbulence and combustion 31 (1975), S. 110-122 
    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: Abstract The heat transfer and fluid flow are determined for fully developed laminar flow in a vertical channel. The effects of natural and forced convection and thermal radiation are included in the analysis. The spectral variation of the radiation properties are included through the use of the total band absorptance. The analysis is general and specific numerical results have been obtained for the 15 micron band of carbon dioxide. A simplified approach for large path is also presented which is in excellent agreement with the more exact results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01795830
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  • 5
    Electronic Resource
    Electronic Resource
    Heat transfer in turbulent flow with radiation for small optical depths (1970)
    Springer
    Flow, turbulence and combustion 22 (1970), S. 31-43 
    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: Abstract A study of the effects of radiation on the heat transfer in fully developed turbulent flow in a channel is carried out. The analysis is valid for both small optical depths and for the optically thin limit. Nongrey effects are included through use of the total band absorptance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00400513
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  • 6
    Electronic Resource
    Electronic Resource
    Thermally developing laminar flows with radiative interaction using the total band absorptance model (1972)
    Springer
    Flow, turbulence and combustion 25 (1972), S. 234-244 
    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: Abstract The problem of energy transfer in a thermally developing, radiating and conducting medium is studied. In particular, laminar flow of carbon monoxide is considered although the results may be interpreted more generally as referring to any infra red radiating diatomic gas. The effects of radiation and conduction on the temperature profile and the Nusselt number are presented for slug flow and for the parabolic velocity distribution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382298
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  • 7
    Electronic Resource
    Electronic Resource
    Mass transfer to rotating cones (1973)
    Springer
    Flow, turbulence and combustion 28 (1973), S. 442-452 
    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: Abstract The mass transfer of oxygen to a rotating cone has been measured in a quiescent fluid. Cones with vertex angles of 19.2°, 30°, 60°, 90°, 120° and 180° (disks) were used in both laminar and turbulent flow at a Schmidt number of 400. The laminar flow mass transfer data is in agreement with an equation derived for cones at high Schmidt numbers. The turbulent flow mass transfer data for cones with vertex angles greater than 19.2° is in agreement with the high Schmidt number expression of Deissler. The 19.2° cone angle, however, results in experimental values for the mass transfer which are greater than the predicted values. Lastly, the values of the Reynolds number for transition from laminar to turbulent flow, as determined directly from the mass transfer data, are in agreement with previous results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413082
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  • 8
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    Experimental investigation of ablation efficiency and plasma expansion during femtosecond and nanosecond laser ablation of silicon (2005)
    Springer
    Details
    Publication Date: 2005-02-01
    Print ISSN: 0947-8396
    Electronic ISSN: 1432-0630
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
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  • 9
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    Thermally developing laminar flows with radiative interaction using the total band absorptance model (1972)
    Springer
    Details
    Publication Date: 1972-01-01
    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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  • 10
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    Laminar convection with an absorbing and emitting gas (1975)
    Springer
    Details
    Publication Date: 1975-08-01
    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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