Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry

doi:10.1088/1674-1056/22/1/014402

Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (1): 14402-014402.doi: 10.1088/1674-1056/22/1/014402

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry

肖波齐

School of Physics and Electromechanical Engineering, Sanming University, Sanming 365004, China

收稿日期:2012-05-31 修回日期:2012-06-20 出版日期:2012-12-01 发布日期:2012-12-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11102100), the Natural Science Foundation of Fujian Province, China (Grant No. 2012J01017), and the Scientific Research Special Foundation for Provincial University of Education Department of Fujian Province, China (Grant No. JK2011056).

Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry

Xiao Bo-Qi (肖波齐)

School of Physics and Electromechanical Engineering, Sanming University, Sanming 365004, China

Received:2012-05-31 Revised:2012-06-20 Online:2012-12-01 Published:2012-12-01
Contact: Xiao Bo-Qi E-mail:xiaoboqi2006@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11102100), the Natural Science Foundation of Fujian Province, China (Grant No. 2012J01017), and the Scientific Research Special Foundation for Provincial University of Education Department of Fujian Province, China (Grant No. JK2011056).

摘要/Abstract

摘要： Analytical expressions for nucleate pool boiling heat transfer of nanofluid in the critical heat flux (CHF) region are derived with taking into account the effect of nanoparticles moving in liquid based on the fractal geometry theory. The proposed fractal model for the CHF of nanofluid is explicitly related to the average diameter of nanoparticles, the volumetric nanoparticle concentration, the thermal conductivity of nanoparticles, the fractal dimension of nanoparticles, the fractal dimension of active cavity on the heated surfaces, the temperature, and the properties of fluid. It is found that the CHF of nanofluid decreases with the increase of the average diameter of nanoparticles. Each parameter of the proposed formulas on CHF has a clear physical meaning. The model predictions are compared with the existing experimental data, and a good agreement between the model predictions and experimental data is found. The validity of the present model is thus verified. The proposed fractal model can reveal the mechanism of heat transfer for nanofluid.

关键词: nanofluid, fractal geometry, heat transfer

Abstract: Analytical expressions for nucleate pool boiling heat transfer of nanofluid in the critical heat flux (CHF) region are derived with taking into account the effect of nanoparticles moving in liquid based on the fractal geometry theory. The proposed fractal model for the CHF of nanofluid is explicitly related to the average diameter of nanoparticles, the volumetric nanoparticle concentration, the thermal conductivity of nanoparticles, the fractal dimension of nanoparticles, the fractal dimension of active cavity on the heated surfaces, the temperature, and the properties of fluid. It is found that the CHF of nanofluid decreases with the increase of the average diameter of nanoparticles. Each parameter of the proposed formulas on CHF has a clear physical meaning. The model predictions are compared with the existing experimental data, and a good agreement between the model predictions and experimental data is found. The validity of the present model is thus verified. The proposed fractal model can reveal the mechanism of heat transfer for nanofluid.

Key words: nanofluid, fractal geometry, heat transfer

中图分类号: (Heat flow in multiphase systems)

44.35.+c

44.25.+f (Natural convection) 05.45.Df (Fractals)

肖波齐. Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry[J]. Chin. Phys. B, 2013, 22(1): 14402-014402.

Xiao Bo-Qi (肖波齐). Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry[J]. Chin. Phys. B, 2013, 22(1): 14402-014402.

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Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry

Prediction of heat transfer of nanofluid on critical heat flux based on fractal geometry

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