NDLI: Effects of Gravity and Surface Tension and Interfacial-Waves and Heat-Transfer Rates in Internal Condensing Flows

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Liang, Q. Wang, X. Barve, A. S. Narain, A.
Copyright Year	2003
Abstract	The paper presents accurate numerical solutions of the full 2D governing equations for steady and unsteady laminar/laminar internal condensing flows. The chosen geometry allows for film condensation on the bottom wall of a tilted (from vertical to horizontal) channel. It is found that it is important to know whether the exit conditions are constrained or unconstrained because incompressible vapor flows occur only for exit conditions that are unconstrained. For the incompressible vapor flow situations, a method for computationally obtaining the stable steady/quasi-steady solutions is given here and the resulting solutions are shown to be in good agreement with some relevant experimental data for horizontal channels. These solutions are shown to be sensitive to the frequency-content and strength of ever-present minuscule transverse vibrations of the condensing surface. The effects of noise-sensitivity, gravity (terrestrial to zero-gravity), and surface tension on the attainability of stable steady/quasi-steady solutions, structure of superposed waves, and heat-transfer rates are discussed. It is shown that significant enhancement in wave-energy and heat-transfer rates are possible by designing the condensing surface noise to be in resonance with the intrinsic waves.
Sponsorship	Heat Transfer Division
Starting Page	663
Ending Page	670
Page Count	8
File Format	PDF
ISBN	0791836940
DOI	10.1115/HT2003-47472
e-ISBN	0791836797
Volume Number	Heat Transfer: Volume 2
Conference Proceedings	ASME 2003 Heat Transfer Summer Conference
Language	English
Publisher Date	2003-07-21
Publisher Place	Las Vegas, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Wave energy Vibration Gravity (force) Vapors Flow (dynamics) Waves Noise (sound) Design Geometry Film condensation Surface tension Resonance Heat transfer
Content Type	Text
Resource Type	Article

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