Recent literature suggests that the droplets that form in horizontal-tube, falling-film absorbers play a major role in the absorption process. The performance of such absorbers is critical to the performance of many absorption heat pump systems. The simulation of droplets of aqueous Lithium Bromide pendant from horizontal tubes was performed by numerically solving the equations of motion on a fixed three-dimensional (3D) grid. The so-called volume of fluid method was used to handle the interface between the liquid and vapor phase. Results are compared with simplified axisymmetric models and with high speed video taken during flow visualization experiments. The results show that simplified axisymmetric models do not satisfactorily represent the evolution of the droplets under horizontal tubes, and that the 3D numerical model appears to accurately match the important characteristics of droplet formation, detachment, and impact observed in the experiments.
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Research Papers
Simulation of Pendant Droplets and Falling Films in Horizontal Tube Absorbers
Jesse D. Killion,
Jesse D. Killion
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
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Srinivas Garimella
e-mail: srinivas.garimella@me.gatech.edu
Srinivas Garimella
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Search for other works by this author on:
Jesse D. Killion
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
Srinivas Garimella
George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405
e-mail: srinivas.garimella@me.gatech.edu
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division October 31, 2003; revision received June 8, 2004. Associate Editor: S. P. Vanka.
J. Heat Transfer. Dec 2004, 126(6): 1003-1013 (11 pages)
Published Online: January 26, 2005
Article history
Received:
October 31, 2003
Revised:
June 8, 2004
Online:
January 26, 2005
Citation
Killion , J. D., and Garimella, S. (January 26, 2005). "Simulation of Pendant Droplets and Falling Films in Horizontal Tube Absorbers ." ASME. J. Heat Transfer. December 2004; 126(6): 1003–1013. https://doi.org/10.1115/1.1833364
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