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Experimental Methods for Investigating the Discrete Droplet Impact Phenomena of a Model Fluid Relevant for LNG Heat Exchangers

[+] Author Affiliations
Amy L. Brunsvold, Åsmund Ervik

SINTEF Energy Research, Trondheim, Norway

He Zhou

Norwegian University of Science and Technology, Trondheim, Norway

Paper No. FEDSM2013-16108, pp. V01CT17A003; 10 pages
doi:10.1115/FEDSM2013-16108
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

To improve knowledge on the design and operational issues of heat exchangers used in the liquefaction process of liquefied natural gas (LNG), experiments were conducted to investigate the complex two-phase flow phenomena in an n-pentane environment. Special focus was placed on characterizing the impact thresholds (bouncing, coalescence, splashing, etc.) of n-pentane droplets impinging on a flowing liquid film of various angles. In the phase diagram of velocity and diameter, the threshold of splashing for n-pentane was found to be below that for water (i.e. lower translational energies lead to splashing). The splashing threshold was well-characterized by a model reported previously for water droplets on stationary surfaces, adjusted slightly for non-normal impacts, which is influenced greatly by the thickness of the liquid film. In addition, the bouncing threshold of n-pentane was found to decrease with higher liquid film velocities with a threshold generally lower than that of water.

Copyright © 2013 by ASME

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