Library Subscription: Guest
Home Archives Officers Future meetings Assembly for International Heat Transfer Conferences
International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

EXPERIMENTAL STUDY ON HEAT TRANSPORT IN TURBULENT RAYLEIGH-BÉNARD CONVECTION WITH VISCOELASTIC FLUIDS

DOI: 10.1615/IHTC16.cov.023495
pages 2911-2917

Tongzhou Wei
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Wei-Hua Cai
School of Energy Science and Engineering, Harbin Institute of Technology, 92 Xi Dazhi St. Nangang District, Harbin 150090, China

Feng-Chen Li
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Zhuhai, China, 519082


KEY WORDS: Convection, Turbulent transport, Viscoelastic fluid, Rayleigh-Bénard convection, Large-scale circulation, Heat transport

Abstract

Rayleigh-Bénard convection is the most typical model of thermal convection. There are only a few researches about the influence of polymer additives in Rayleigh-Bénard convection. And how surfactant additives influence the heat transport in RBC system remains unclear. This paper presents an experimental study on the heat transport in turbulent Rayleigh-Bénard convection with polymer solutions and surfactant solutions. A decrease of the measured Nusselt number is observed in both polymer solution case and surfactant solution case, while the Nusselt number in surfactant solution case is smaller than that in polymer case. The velocity field was obtained by particle image velocimetry. The results show that the large-scale circulation in polymer solution case is similar to that in Newtonian fluid case but it fails to form in surfactant solution case. For the Reynolds number, the curves do not change with the addition of polymer, but the Reynolds number decreased obviously in surfactant solution case. The above phenomena of surfactant solution case are caused by its shear-shinning and elastic characteristics.

Download article Publication Ethics and Malpractice Recommend to my Librarian Bookmark this Page