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A method for enhancing heat transfer in micro-nanoscale channels using nanofluids

A nano-fluid, micro-nano technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of optimizing the heat transfer performance of nano-fluids, which no one has raised, to reduce pressure drop and enhance heat transfer characteristics Effect

Inactive Publication Date: 2018-08-17
FUZHOU UNIV
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Problems solved by technology

[0004] Summarizing many patents related to nanofluids, we found that although many preparation methods and practical applications of nanofluids have been proposed, no one has proposed how to optimize the heat transfer performance of nanofluids

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  • A method for enhancing heat transfer in micro-nanoscale channels using nanofluids
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  • A method for enhancing heat transfer in micro-nanoscale channels using nanofluids

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Please refer to figure 1 , the present invention provides a method of using nanofluids to enhance heat transfer in micro-nano-scale channels, which is characterized in that it includes the following steps:

[0033] Step S1: if figure 2 As shown, the physical model of the determined channel is a horizontal channel of micro-nano size, and the nanofluid is a mixture of metal oxide nanoparticles and water. The diameter of the metal oxide nanoparticles ranges from 1nm to 100nm. This embodiment uses A mixture of titanium dioxide nanoparticles and water, the horizontal channel includes two flat plates, the outer hot side of the two flat plates, the inner side is the cold side, the nanofluid flows through the inner side of the two flat plates; near the wall of the slip flow region There are velocity slips and temperature jumps, and due to the synergis...

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Abstract

The present invention relates to a method for enhancing heat transmission of a micro-nano channel by adopting a nanofluid. The method is characterized by comprising the following steps of: confirming a physical model of the channel; building a mathematical model according to the physical model; confirming a relation of influence of temperature jump on the heat transmission property of the channel; confirming the influence of the changes of Knudsen number (Kn) on the heat transmission property of the channel at different nano-particle volume fractions phi B, and confirming a parameter when the influence is maximal; and confirming the influence of the changes of NBT on the heat transmission property of the channel, and confirming a parameter when the influence is maximal. The method realizes the optimal utilization of the heat transmission property of the nanofluid; and a heat transmission coefficient can be increased by 28.59%.

Description

technical field [0001] The invention relates to a method for enhancing heat transfer in micro-nano-scale channels by using nanofluid. Background technique [0002] Nanofluids are fluids that contain nanometer-sized particles (also called nanoparticles) in pure fluids. With the significant increase of high-energy load devices, such as power stations, manufacturing and transportation industries, traditional coolants can no longer effectively remove heat. Wang (1999) et al. and Pantzali (2009) et al. found that the addition of nanoparticles to pure fluids can greatly enhance the heat transfer effect. Therefore, the application of nanofluids has attracted extensive attention of scientists. [0003] In recent years, many patents related to the preparation methods of nanofluids have been proposed. For example, a method for preparing carbon nanofluid proposed by Liu Minsheng et al. (publication number CN101063032A); a preparation method of alcohol-based diamond nanofluid propose...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 杨臣郭加栋邱挺王红星黄智贤李玲叶长燊
Owner FUZHOU UNIV