Выходит 18 номеров в год
ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561
Indexed in
Experimental and Computational Investigation of the Hydrodynamics and Heat Transfer in a Flat Channel of Variable Width for Smooth and Intensified Surfaces
Краткое описание
We present the results of experimental and computational investigation of the resistance and heat transfer in a flat channel of variable width with converging and diverging flows at rather small convergence (divergence) angles. The results were obtained for both smooth surfaces and surfaces with intensification by dimples. It is showed experimentally that for long channels, laminarization and flow instability effects appear even at angles of 1-2°. But there is a noticeable influence only on the resistance coefficient, whereas the behavior of heat transfer is almost the same as in the absence of acceleration for both smooth and intensified surface. The numerical analysis of convective heat transfer in a narrow converging channel with a package of 15 conical dimples on one of its sides generally confirmed the data obtained in physical experiments on the advanced increase in heat transfer as compared to hydraulic resistance. Vortex-type flow synchronization effect in dimples is established.
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Isaev S. A., Baranov P. A., Zhukova Yu. V., Usachov A. E., Kharchenko V. B., Correction of the Shear-Stress-Transfer Model with Account of the Curvature of Streamlines in Calculating Separated Flows of an Incompressible Viscous Fluid, Journal of Engineering Physics and Thermophysics, 87, 4, 2014. Crossref
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Isaev S.A., Schelchkov A.V., Leontiev A.I., Gortyshov Yu F., Baranov P.A., Popov I.A., Vortex heat transfer enhancement in the narrow plane-parallel channel with the oval-trench dimple of fixed depth and spot area, International Journal of Heat and Mass Transfer, 109, 2017. Crossref
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Isaev S. A., Experience of application of SST-model-2003 with correction on streamline curvature according to Rodi-Leshziner-Isaev approach for (U)RANS calculations of separated and vortex sub- and supersonic flows, 2027, 2018. Crossref
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Rashidi Saman, Hormozi Faramarz, Sundén Bengt, Mahian Omid, Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications, Applied Energy, 250, 2019. Crossref
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Isaev S.A., Gritckevich M.S., Leontiev A.I., Milman O.O., Nikushchenko D.V., NT Vortex enhancement of heat transfer and flow in the narrow channel with a dense packing of inclined one-row oval-trench dimples, International Journal of Heat and Mass Transfer, 145, 2019. Crossref
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Isaev Sergey, Nikushchenko Dmitry, Sudakov Alexandr, Tryaskin Nikita, Egorova Ann, Iunakov Leonid, Usachov Alexandr, Kharchenko Valery, Standard and Modified SST Models with the Consideration of the Streamline Curvature for Separated Flow Calculation in a Narrow Channel with a Conical Dimple on the Heated Wall, Energies, 14, 16, 2021. Crossref
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Isaev S. A., Genesis of Anomalous Intensification of Separation Flow and Heat Transfer in Inclined Grooves on Structured Surfaces, Fluid Dynamics, 57, 5, 2022. Crossref
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Isaev Sergey, Leontiev Alexandr, Gritskevich Mikhail, Nikushchenko Dmitry, Guvernyuk Sergey, Sudakov Alexandr, Chung Kung-Ming, Tryaskin Nikita, Zubin Mikhail, Sinyavin Alexey, Development of energy efficient structured plates with zigzag arrangement of multirow inclined oval trench dimples, International Journal of Thermal Sciences, 184, 2023. Crossref