Numerical Investigation of nano-PCM Melting Enhanced by Thermocapillary Convection under Microgravity Condition

被引：0
作者：
Xiaoming Zhou
Wenhao Duan
Faxuan Chi
Yanni Jiang
机构：
[1] Hohai University,College of Mechanical and Electrical Engineering
来源：
Microgravity Science and Technology | / 34卷
关键词：
Nano-PCM; Thermocapillary convection; Microgravity; Heat transfer;
D O I：
暂无
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学科分类号：
摘要：
Natural convection is greatly weakened under microgravity condition, so the nano-PCM (phase change material) melting enhanced by thermocapillary effect is an effective method. This paper reports the numerical investigation of nano-PCM melting under microgravity condition, and the influence of thermocapillary effect and nanoparticles volume fraction on the melting process and heat transfer is studied. The computational results show that, for PCM-CNT, with nanoparticles volume fraction increasing the melting time decreases, however, for PCM-Al2O3 and PCM-Cu, the melting time increases gradually. With temperature difference increasing the molten time of nano-PCM decreases, the melting front of nano-PCM at free surface becomes more convex, and thermocapillary convection instability is more likely to occur in the melting process. For nanoparticles CNT, Cu and Al2O3, the CNT is more suitable for the phase change enhancement of n-octadecane.
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[1]  
Brinkman HC(1952)The viscosity of concentrated suspensions and solutions J. Chem. Phys. 20 571-803
[2]  
Chen X(2019)Numerical Study on Melting Phase Change under Microgravity Microgravity Sci. Technol. 31 793-196
[3]  
Hao GQ(2019)The Thermocapillary Effcts in Phase Change Materials in Microgravity experiment: Design, preparation and execution of a parabolic flight experiment Acta Astronaut. 162 185-191
[4]  
Yao F(2020)Experimental evidence of thermocapillarity in phase change materials in microgravity: Measuring the effect of Marangoni convection in solid/liquid phase transitions Int. Commun. Heat Mass Transfer 113 187-177
[5]  
Zhang CB(1962)Thermal conductivity of heterogeneous two component systems Ind. Eng. Chem. Fundam. 1 37-4428
[6]  
Ezquerro JM(2021)Effect of substrate microstructure on thermocapillary flow and heat transfer of nanofluid droplet on heated wall Microgravity Sci. Technol. 33 167-467
[7]  
Bello A(2020)Effects of nanoparticle shapes on heat and mass transfer of nanofluid thermocapillary convection around a gas bubble Microgravity Sci. Technol. 32 4410-1176
[8]  
Sánchez PS(2011)A critical synthesis of thermophysical characteristics of nanofluids Int. J. Heat Mass Transf. 54 467-277
[9]  
Laveron-Simavilla A(2021)The combined effect of natural and thermocapillary convection on the melting of phase change materials in rectangular containers Int. J. Heat Mass Transf. 168 1169-1817
[10]  
Lapuerta V(1983)Solar heat storage: latent heat material-Volume 1: background and scientific principles J. Solar Energy Eng. 105 A20-undefined
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