Author
Guo-yan Zhou
Bio: Guo-yan Zhou is an academic researcher from East China University of Science and Technology. The author has contributed to research in topics: Pressure drop & Heat transfer. The author has an hindex of 5, co-authored 5 publications receiving 213 citations.
Papers
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TL;DR: In this article, the effects of geometrical parameters on the performance of the twisted oval tube have been analyzed numerically and experimentally and the results reveal that the heat transfer coefficient and friction factor both increase with the increasing of axis ratio a/b, while both decrease with the increase of twist pitch length P.
89 citations
TL;DR: In this article, the authors analyzed the influence of twisted pitch length P and aspect ratio A/B on the performance of the shell side of twisted oval tube heat exchanger and found that the intensity of spiral flow becomes more and more drastic with the increasing of A and decreasing of P.
73 citations
TL;DR: In this paper, the heat transfer and pressure drop performance of a twisted oval tube heat exchanger has been experimentally studied and compared with a rod baffle and a smooth round tube.
69 citations
TL;DR: In this article, the effect of degree of saturation of inlet air on the heat transfer rate and process-water outlet temperature was presented, and little difference was found between the unsaturated and supersaturated conditions if the outlet air was supersaturated.
23 citations
TL;DR: In this article, the thermal and hydraulic performance of plain and oval tubes closed wet cooling tower (CWCT) is investigated numerically using Computational Fluid Dynamics (CFD), ANSYS Fluent 12.1.
Abstract: The thermal and hydraulic performance of plain and oval tubes closed wet cooling tower (CWCT) are investigated numerically. Computational fluid dynamics (CFD), ANSYS Fluent 12.1, is implemented for the numerical solution. Species transport without reactions is adopted to simulate the mass transfer from the air-deluge water interface to the air. Different turbulence models and near-wall treatments are used to assess which model fits the data better. The mass transfer Colburn factor j m , and friction factor f are presented and compared with experimental data. The proposed CFD model is also applied to predict the mass transfer coefficient of another CWCT and compares well with the experimental data.
9 citations
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TL;DR: In this paper, the authors compared the heat transfer performance of twisted tri-lobed tube (TTT) and twisted oval tube (TOT) with Reynolds number of 8000-21,000 with a validated SST k − ω turbulence model.
108 citations
TL;DR: In this article, the heat transfer and friction factor characteristics of air flow inside twisted square ducts are studied experimentally and through three-dimensional numerical simulations for both laminar and turbulent flow regimes.
81 citations
TL;DR: In this article, a new tube insert, called centrally hollow narrow twisted tape, is developed and its effect on the heat transfer enhancement performance of a tube under laminar flow conditions is numerically simulated.
75 citations
TL;DR: In this article, the authors analyzed the influence of twisted pitch length P and aspect ratio A/B on the performance of the shell side of twisted oval tube heat exchanger and found that the intensity of spiral flow becomes more and more drastic with the increasing of A and decreasing of P.
73 citations
TL;DR: In this paper, a finite volume method (FVM) solver with k-e turbulence model and enhanced wall treatment is used first time to investigate the flow of water at different velocities with higher Reynolds number in a 3D pipe.
72 citations