Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts a and B 2007
DOI: 10.1115/imece2007-41311
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Steady “Attractors” for Forced Flow of Vapor Condensing Over a Horizontal Plate (Problem in Cess and Koh) and Their Unsteady Responses to Initial Disturbances and Noise

Abstract: Accurate steady and unsteady numerical solutions of the full 2-D governing equations – that model the film condensation of saturated vapor flowing over a horizontal plate (the problem of Cess [1] and Koh [2]) – are obtained and new results on the solutions’ unsteady response to disturbances are presented. The computations reveal important features of this classical condensing flow problem. The results highlight the scope and limitations of the well-known similarity solution given by Koh [2]. For the steady pro… Show more

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“…In fact, the strong versus weak attractor situations depicted, respectively, in Figures 2 and 3 for vertical (gravity‐driven) and 0g (shear driven) flows is quite typical and are also present, respectively, for their external flow counterparts, namely the Nusselt problem (see Phan and Narain 28 ) and the Koh problem (see Kulkarni et al 2–3 …”
Section: Introductionmentioning
confidence: 87%
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“…In fact, the strong versus weak attractor situations depicted, respectively, in Figures 2 and 3 for vertical (gravity‐driven) and 0g (shear driven) flows is quite typical and are also present, respectively, for their external flow counterparts, namely the Nusselt problem (see Phan and Narain 28 ) and the Koh problem (see Kulkarni et al 2–3 …”
Section: Introductionmentioning
confidence: 87%
“…The experiments reported here involve a single pure working fluid (FC‐72 by 3M Corp. (St. Paul, MN)) and focus on inlet mass flow rates that correspond to inlet vapor Reynolds numbers in the range of 10,000–40,000 and vapor to wall temperature differences of 3°–60°C (i.e., 0 ≤ Ja ≤ 0.4). Furthermore, computational results for external condensing flows that are obtained from this simulation tool have a proven record (see Phan and Narain 28 and Kulkarni et al 2,3 ) for making qualitatively and quantitatively correct predictions for steady flows. The steady flow predictions are in excellent agreement with the classical solutions of Nusselt 21 and Koh 29 .…”
Section: Introductionmentioning
confidence: 99%
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