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• W52938306 abstract "It is common practice to design water chiller units and heat exchangers in such a way that they do not operate within the transition region. This is mainly due to the perceived chaotic behaviour as well as the paucity of information in this region. Due to design constraints or change of operating conditions, however, exchangers are often forced to operate in this region. This is even worse for enhanced tubes as much less information within this region is available. It is also well known that the entrance has an influence on where transition occurs, adding to the woes of available information. The purpose of this study is thus to obtain heat transfer and friction factor data in the transition region of fully developed and developing flows inside smooth and enhanced tubes, using water as the working fluid, and to develop correlations from these results. The use of different inlets, tube diameters and enhanced tubes was also investigated with regards to the commencement of transition. Heat transfer and pressure drop data were obtained from six different types of tubes with diameters of 15.88 mm (5/8′′) and 19.02 mm (3/4′′). Low fin enhanced tubes with a fin height to diameter ratio of 0.4 and helix angles of 18◦ and 27◦ were investigated. Heat transfer was obtained by means of an in-tube heat exchanger with the cooling of water being used as the test fluid. Reynolds numbers ranged between 1 000 and 20 000 while Prandtl numbers were in the order of 4 to 6. Uncertainties in heat transfer coefficient and friction factors were on average below 2.5% and 10% respectively. Adiabatic friction factor results showed that the use of different inlets influenced the commencement of transition. The smoother the inlet profile the more transition was delayed, confirming previous work done. The effect of increasing tube diameters had a slight delay in transition. Enhanced tubes caused transition to occur at lower Reynolds numbers which was accounted for by the fin height and not the helix angle. Heat transfer results showed that transition occurred at approximately the same Reynolds number for all the different inlets and enhanced tubes. This was attributed to the secondary flow forces influencing the growing hydrodynamic boundary layer. These secondary flow forces also influenced the laminar heat transfer and diabatic friction factors with both these parameters being higher. Turbulent enhanced tube heat transfer results were higher than those of the smooth tube, with the tube with the greatest helix angle showing the greatest increase. Correlations were developed for all the tubes and their inlets and predicted all the data on average to within 3%." @default.
• W52938306 created "2016-06-24" @default.
• W52938306 creator A5036027929 @default.
• W52938306 date "2010-04-18" @default.
• W52938306 modified "2023-09-28" @default.
• W52938306 title "Single -phase heat transfer and pressure drop of water cooled at a constant wall temperature inside horizontal circular smooth and enhanced tubes with different inlet configuration in the transitional flow regime" @default.
• W52938306 cites W1214580979 @default.
• W52938306 cites W1523480373 @default.
• W52938306 cites W1526703155 @default.
• W52938306 cites W1565897330 @default.
• W52938306 cites W1585973949 @default.
• W52938306 cites W176193443 @default.
• W52938306 cites W1964818646 @default.
• W52938306 cites W1968116895 @default.
• W52938306 cites W1968524236 @default.
• W52938306 cites W1969173689 @default.
• W52938306 cites W1969830913 @default.
• W52938306 cites W1970651439 @default.
• W52938306 cites W1972996522 @default.
• W52938306 cites W1982380587 @default.
• W52938306 cites W1987956047 @default.
• W52938306 cites W1988518769 @default.
• W52938306 cites W1990536516 @default.
• W52938306 cites W1992338392 @default.
• W52938306 cites W1995179757 @default.
• W52938306 cites W1996421435 @default.
• W52938306 cites W2004377874 @default.
• W52938306 cites W2006317248 @default.
• W52938306 cites W2006872725 @default.
• W52938306 cites W2007179778 @default.
• W52938306 cites W2008750151 @default.
• W52938306 cites W2010119684 @default.
• W52938306 cites W2011373238 @default.
• W52938306 cites W2011796652 @default.
• W52938306 cites W2018623541 @default.
• W52938306 cites W2022273897 @default.
• W52938306 cites W2024008209 @default.
• W52938306 cites W2024229858 @default.
• W52938306 cites W2027525523 @default.
• W52938306 cites W2028787636 @default.
• W52938306 cites W2030915291 @default.
• W52938306 cites W2030918283 @default.
• W52938306 cites W2032426265 @default.
• W52938306 cites W2033829644 @default.
• W52938306 cites W2036712400 @default.
• W52938306 cites W2041007818 @default.
• W52938306 cites W2045475309 @default.
• W52938306 cites W2052712255 @default.
• W52938306 cites W2055784861 @default.
• W52938306 cites W2056754315 @default.
• W52938306 cites W2057967917 @default.
• W52938306 cites W2058739054 @default.
• W52938306 cites W2060444115 @default.
• W52938306 cites W2060716878 @default.
• W52938306 cites W2065291286 @default.
• W52938306 cites W2071830788 @default.
• W52938306 cites W2074976029 @default.
• W52938306 cites W2077077213 @default.
• W52938306 cites W2080225226 @default.
• W52938306 cites W2081899382 @default.
• W52938306 cites W2082344581 @default.
• W52938306 cites W2089499524 @default.
• W52938306 cites W2090206670 @default.
• W52938306 cites W2095061685 @default.
• W52938306 cites W2097256556 @default.
• W52938306 cites W2100236224 @default.
• W52938306 cites W2105173244 @default.
• W52938306 cites W2107180135 @default.
• W52938306 cites W2113980862 @default.
• W52938306 cites W2125561079 @default.
• W52938306 cites W2135768099 @default.
• W52938306 cites W2137661976 @default.
• W52938306 cites W2145280400 @default.
• W52938306 cites W2149988879 @default.
• W52938306 cites W2154504046 @default.
• W52938306 cites W2166194834 @default.
• W52938306 cites W2166553070 @default.
• W52938306 cites W2400863972 @default.
• W52938306 cites W2469274152 @default.
• W52938306 cites W2553310068 @default.
• W52938306 cites W2597032729 @default.
• W52938306 cites W2898067667 @default.
• W52938306 cites W2920875148 @default.
• W52938306 cites W2946565366 @default.
• W52938306 cites W3047649396 @default.
• W52938306 cites W3131587630 @default.
• W52938306 cites W3133751671 @default.
• W52938306 cites W622891708 @default.
• W52938306 cites W652067813 @default.
• W52938306 cites W1645074618 @default.
• W52938306 cites W2479161397 @default.
• W52938306 cites W323213729 @default.
• W52938306 cites W73569616 @default.
• W52938306 hasPublicationYear "2010" @default.
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