Numerical simulations of the piston effect for near-critical fluids in   spherical cells under small thermal disturbance

doi:10.1016/j.ijthermalsci.2016.03.019

CORC > 北京大学 > 工学院

	Numerical simulations of the piston effect for near-critical fluids in spherical cells under small thermal disturbance
	Hu, Zhan-Chao ; Zhang, Xin-Rong
刊名	INTERNATIONAL JOURNAL OF THERMAL SCIENCES
	2016
关键词	Near-critical fluids Piston effect Numerical simulations RAYLEIGH-BENARD CONVECTION SPACELAB MISSION D-2 VAPOR CRITICAL-POINT CRITICAL SPEEDING-UP PURE FLUIDS SUPERCRITICAL FLUIDS CRITICAL ISOCHORE CARBON-DIOXIDE HEAT TRANSPORT
DOI	10.1016/j.ijthermalsci.2016.03.019
英文摘要	Near the liquid vapor critical point, strong anomalies in thermodynamic and transport properties induce the piston effect. In the present study, the piston effect is investigated in spherical cells filled with near-critical fluids under zero gravity and small thermal disturbance conditions by numerically solving the thermodynamic model. The results show typical fast-responding bulk temperature, together with high and stable temperature efficiency, which is determined by the particular nature of near-critical fluids. Particularly, a nondimensionalization method is developed to study the influences of the specific heat ratio on the piston effect by simulations for eight near-critical fluids. Results show the specific heat ratio is an efficient indicator, which is negatively correlated with the nondimensional bulk temperature change. The influences of the characteristic length and the boundary conditions on the piston effect are also studied for near-critical carbon dioxide. In addition, some rules concerning the boundary heat flux and the overall heat transfer are also discussed and concluded. (C) 2016 Elsevier Masson SAS. All rights reserved.; National Science Foundation of China [51476001]; SCI(E); EI; ARTICLE; xrzhang@coe.pku.edu.cn; 131-140; 107
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437039]
专题	工学院
推荐引用方式 GB/T 7714	Hu, Zhan-Chao,Zhang, Xin-Rong. Numerical simulations of the piston effect for near-critical fluids in spherical cells under small thermal disturbance[J]. INTERNATIONAL JOURNAL OF THERMAL SCIENCES,2016.
APA	Hu, Zhan-Chao,&Zhang, Xin-Rong.(2016).Numerical simulations of the piston effect for near-critical fluids in spherical cells under small thermal disturbance.INTERNATIONAL JOURNAL OF THERMAL SCIENCES.
MLA	Hu, Zhan-Chao,et al."Numerical simulations of the piston effect for near-critical fluids in spherical cells under small thermal disturbance".INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2016).