High-intensity drying process: Impulse drying. Progress report on modeling of fluid flow and heat transfer in a crown compensated impulse drying roll: The heat transfer problem

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Results of this study indicate that under the conditions where the two boundaries are maintained at the same temperature, the viscous heat dissipation within the lubricant, due to viscous drag and inertial effects, plays a major role in the net heat transfer. However, when the inner surface temperature is much greater than that of the shoe, the effect of viscous heat dissipation is reduced significantly. For the conditions analyzed in this study, the regions under the solid part of the shoe, which are associated with a greater lubricant velocity, had a significant influence on the magnitude of the heat transfer ... continued below

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111 p.

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Orloff, D.; Hojjatie, B. & Bloom, F. July 1, 1995.

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Description

Results of this study indicate that under the conditions where the two boundaries are maintained at the same temperature, the viscous heat dissipation within the lubricant, due to viscous drag and inertial effects, plays a major role in the net heat transfer. However, when the inner surface temperature is much greater than that of the shoe, the effect of viscous heat dissipation is reduced significantly. For the conditions analyzed in this study, the regions under the solid part of the shoe, which are associated with a greater lubricant velocity, had a significant influence on the magnitude of the heat transfer from the oil to the roll; because of a greater lubricant thickness for the left-hand sub-channel, the dissipated heat, and net heat transfer under the solid part in the left-hand sub-channel was greater than that for the corresponding region in the right-hand sub-channel. Numerical techniques such as finite difference or finite element analysis should be utilized to determine the thermal performance of the press roll subjected to a temperature dependent viscosity. and other types of boundary conditions. The temperature distributions predicted from such a model should be incorporated in a finite element model to determine the stress distribution within the roll coating for various design and operating conditions.

Physical Description

111 p.

Notes

OSTI as DE96002345

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  • Other Information: PBD: Jul 1995

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  • Other: DE96002345
  • Report No.: DOE/CE/40738--T11
  • Grant Number: FG07-85CE40738
  • DOI: 10.2172/183137 | External Link
  • Office of Scientific & Technical Information Report Number: 183137
  • Archival Resource Key: ark:/67531/metadc670083

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Dec. 7, 2015, 4:46 p.m.

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Orloff, D.; Hojjatie, B. & Bloom, F. High-intensity drying process: Impulse drying. Progress report on modeling of fluid flow and heat transfer in a crown compensated impulse drying roll: The heat transfer problem, report, July 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc670083/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.