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A mechanism of heat transfer enhancement or deterioration of nanofluid flow boiling
International Journal of Heat and Mass Transfer, 2020Abstract In present work, the heat transfer characteristics of SiC/H2O and Graphite/H2O nanofluids flow boiling are experimentally studied with the consideration of pressure, mass flux and heat flux. Compared with based fluid, both enhancement and deterioration of nanofluids boiling heat transfer are found.
Suizheng Qiu, Yun Wang
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Heat transfer under supercritical pressures and heat transfer deterioration boundaries
Thermal Engineering, 2006Some relations for technical calculations of the normal heat transfer in a rising water flow under supercritical pressure (SCP) are analyzed and compared with recent experimental data obtained at the Institute of Physics and Engineering (Obninsk). The accuracy of recommendations concerning the calculation of heat transfer is estimated.
V. A. Grabezhnaya, P. L. Kirillov
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Deterioration in heat transfer of endothermal hydrocarbon fuel
Journal of Thermal Science, 2011Numerical studies under supercritical pressure are carried out to study the heat transfer characteristics in a single-root coolant channel of the active regenerative cooling system of the scramjet engine, using actual physical properties of pentane. The relationships between wall temperature and inlet temperature, mass flow rate, wall heat flux, inlet ...
Weixing Zhou +3 more
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Heat transfer deterioration in a supercritical water channel
Nuclear Engineering and Design, 2010Abstract Supercritical water is the working fluid in the supercritical water reactor (SCWR) because of its high thermal efficiency and simplicity. Computational fluid dynamics (CFD) technology has been applied in the studies of supercritical water in circular channels by solving conservation equations of mass, momentum, and energy.
Min-Tsung Kao +3 more
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Heat Transfer at Supercritical Pressures and the Onset of Deterioration
Volume 2: Thermal Hydraulics, 2006The comparison of the data on heat transfer at supercritical pressures (SCP) demonstrates that they have a considerable spread, which shows a complex nature of the process and a probable inaccuracy in the methods of data processing caused by a sharp change in thermophysical properties near the pseudocritical point.
Pavel L. Kirillov, Vera A. Grabezhnaya
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On the Onset of Heat Transfer Deterioration in Supercritical Coolant Flow Channels
43rd AIAA Thermophysics Conference, 2012The deterioration of forced convection heat transfer can affect channel flows of supercritical fluids, and therefore has to be taken in consideration when dealing with regenerative cooling of liquid rocket engines. A threshold value of the ratio between the heat flux and the specific mass flow rate is identified as the main parameter controlling the ...
URBANO, ANNAFEDERICA, NASUTI, Francesco
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Deterioration of Heat Transfer at Supercritical Pressures of a Substance
Journal of Engineering Physics and Thermophysics, 2001Results of an experimental investigation of the transition from the enhanced mode of heat transfer to a deteriorated mode at supercritical pressures of toluene are presented.
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On the heat transfer deterioration during condensation of binary mixtures
Applied Physics Letters, 2019Heat transfer processes involving binary- and multicomponent mixtures are ubiquitous in nature, particularly in several industries like the chemical and petrochemical ones. Condensation of binary mixtures inside pipes has been extensively studied during the past decades for unraveling the physical mechanisms controlling heat transfer. In particular, it
C. A. Dorao, M. Fernandino
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Deterioration of heat transfer in turbulent channel flows due to nanoparticles
International Journal of Heat and Mass Transfer, 2021Abstract Custom-designed nanoparticles offer the possibility of influencing the thermo-physical properties of heat carriers, such as water and transformer oil. The present study aims to clarify to what extent such nanofluids may improve convective heat transfer under turbulent flow conditions.
Silvio Tschisgale, Tobias Kempe
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