Mean velocity and temperature scaling for near-wall turbulence with heat transfer at supercritical pressure

doi:10.1063/5.0002855

	Mean velocity and temperature scaling for near-wall turbulence with heat transfer at supercritical pressure
	Wan, Teng 1; Zhao, Pinghui 2; Liu, Jiaming 1; Wang, Chaozheng 1; Lei, Mingzhun 2
刊名	PHYSICS OF FLUIDS
	2020-05-01
卷号	32
ISSN号	1070-6631
DOI	10.1063/5.0002855
通讯作者	Zhao, Pinghui(phzhao@mail.ustc.edu.cn)
英文摘要	Compared with conventional gaseous and liquid fluids, fluids operating at supercritical pressure undergo drastic variations in thermophysical properties within a small temperature range across the pseudo-critical point. Therefore, the effect of these variations on flow and heat transfer must be studied. This paper presents direct numerical simulations (DNSs) of the turbulent heat transfer of CO2 at supercritical pressure in a fully developed channel flow between two isothermal walls. The thermophysical property tables generated from the REFPROF 9.1 database were used in this DNS. The velocity and temperature scaling and the analogy between momentum and scalar transport are comprehensively explored by using stress balance and semi-local methods. The results show that at small temperature differences, the velocity transformation developed by Trettel and Larsson ["Mean velocity scaling for compressible wall turbulence with heat transfer," Phys. Fluids 28, 026102 (2016)] with a semi-local coordinate provides a good description of the near-wall turbulence of supercritical fluids. Upon including how large specific-heat variations affect temperature transformation, the logarithmic region of the cooled wall becomes consistent, as does the heated wall in a certain temperature range. In addition, in near-wall turbulence with small temperature differences at supercritical pressure, momentum transport is highly analogous to scalar transport.
资助项目	Collaborative Innovation Program of Hefei Science Center, CAS[2019HSC-CIP006] ; National Key Research and Development Program of China[2017YFE0300500] ; National Key Research and Development Program of China[2017YFE0300503]
WOS关键词	DIRECT NUMERICAL-SIMULATION ; MIXED CONVECTION ; CHANNEL FLOW ; FORCED-CONVECTION ; CARBON-DIOXIDE ; BOUNDARY-LAYER ; FLUID ; STATISTICS ; WATER ; DNS
WOS研究方向	Mechanics ; Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000533632200003
资助机构	Collaborative Innovation Program of Hefei Science Center, CAS ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103227]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhao, Pinghui
作者单位	1.Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wan, Teng,Zhao, Pinghui,Liu, Jiaming,et al. Mean velocity and temperature scaling for near-wall turbulence with heat transfer at supercritical pressure[J]. PHYSICS OF FLUIDS,2020,32.
APA	Wan, Teng,Zhao, Pinghui,Liu, Jiaming,Wang, Chaozheng,&Lei, Mingzhun.(2020).Mean velocity and temperature scaling for near-wall turbulence with heat transfer at supercritical pressure.PHYSICS OF FLUIDS,32.
MLA	Wan, Teng,et al."Mean velocity and temperature scaling for near-wall turbulence with heat transfer at supercritical pressure".PHYSICS OF FLUIDS 32(2020).