Heat transfer in falling film on a horizontal tube

Armbruster, R; Mitrovic, J

Title: Heat transfer in falling film on a horizontal tube

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Abstract

This paper presents some results of an experimental investigation of heat transfer in liquid films falling on a horizontal smooth tube performed under still and flowing air conditions. Heat transfer measurements conducted with water and isopropyl alcohol were supplemented by investigations of film breakdown and temperature distributions in axial and circumferential direction of the test tube. Film breakdown was observed to depend mainly on the heat flux, the flow rate, the flow pattern (droplets, columns, sheet), and the physical properties of the liquid. Temperature distributions were affected by the flow pattern. Heat transfer measurements in still air showed satisfactory agreement with some existing correlations. In the case of flowing air, a considerable increase in heat transfer due to evaporation at the film surface was observed.

Authors:

Armbruster, R; Mitrovic, J ^[1]

Univ. Stuttgart (Germany). Inst. fuer Technische Thermodynamik und Thermische Verfahrenstechnik

Publication Date:: Sun Dec 31 00:00:00 EST 1995

Sponsoring Org.:: Deutsche Forschungsgemeinschaft, Bonn (Germany)

OSTI Identifier:: 445430

Report Number(s):: CONF-950828-
ISBN 0-7918-1713-X; TRN: IM9713%%166

Resource Type:: Book

Resource Relation:: Conference: 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 national heat transfer conference: Proceedings. Volume 12: Falling films; Fundamentals of subcooled flow boiling; Compact heat exchanger technology for the process industry; HTD-Volume 314; Sernas, V. [ed.] [Rutgers-the State Univ., New Brunswick, NJ (United States)]; Boyd, R.D. [ed.] [Prairie View A and M Univ., TX (United States)]; Jensen, M.K. [ed.] [Rensselaer Polytechnic Inst., Troy, NY (United States)]; PB: 191 p.

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; HEAT TRANSFER; FILM FLOW; TUBES; EXPERIMENTAL DATA; TEMPERATURE DISTRIBUTION; HEAT EXCHANGERS

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                    Armbruster, R, and Mitrovic, J. Heat transfer in falling film on a horizontal tube.  United States: N. p., 1995. 
        Web.

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                    Armbruster, R, & Mitrovic, J. Heat transfer in falling film on a horizontal tube.  United States.

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                    Armbruster, R, and Mitrovic, J. 1995.  
        "Heat transfer in falling film on a horizontal tube".  United States.

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@article{osti_445430,

  title        = {Heat transfer in falling film on a horizontal tube},

  author       = {Armbruster, R and Mitrovic, J},

  abstractNote = {This paper presents some results of an experimental investigation of heat transfer in liquid films falling on a horizontal smooth tube performed under still and flowing air conditions. Heat transfer measurements conducted with water and isopropyl alcohol were supplemented by investigations of film breakdown and temperature distributions in axial and circumferential direction of the test tube. Film breakdown was observed to depend mainly on the heat flux, the flow rate, the flow pattern (droplets, columns, sheet), and the physical properties of the liquid. Temperature distributions were affected by the flow pattern. Heat transfer measurements in still air showed satisfactory agreement with some existing correlations. In the case of flowing air, a considerable increase in heat transfer due to evaporation at the film surface was observed.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/445430},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Dec 31 00:00:00 EST 1995},

  month        = {Sun Dec 31 00:00:00 EST 1995}

}

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