Experimental measurement of dynamic concentration of nanofluid in laminar flow

Hong, Jiaju and Liu, Sheng and Yan, Yuying and Glover, Paul (2017) Experimental measurement of dynamic concentration of nanofluid in laminar flow. Experimental Thermal and Fluid Science, 88 . pp. 483-489. ISSN 0894-1777

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Abstract

Nanofluid is thought to have a potential enhancement in heat transfer behaviour of fluid. The nanoparticle concentration in nanofluid is one of the most important factors that affect the nanofluid behaviour. The static concentration was applied in the researches under flowing condition. In this paper, Nuclear Magnetic Resonance (NMR) scanning was applied to study the dynamic concentration of nanofluid flow in pipe. The experiments were carried out with ferrofluid under different concentration and temperature. A new parameter T2* was introduced in the study. Experiments were carried out to obtain the T2* of nanofluid in the pipe. An empirical equation based on T2* and temperature was proposed to calculate the concentration of nanoparticles. Then, experiments were carried out with flowing ferrofluid in pipe. The dynamic concentration was calculated with the empirical equation. It has a highest concentration near the pipe wall. The concentration decreases from the wall to the pipe centre. Furthermore, the experiment result also gives out a chance to investigate the mechanism of nanoparticle movement in laminar flow with the concentration gradient along radius.

Item Type: Article
Keywords: Dynamic concentration; Nanofluid; NMR
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1016/j.expthermflusci.2017.06.022
Depositing User: Eprints, Support
Date Deposited: 29 Jun 2017 12:43
Last Modified: 31 Jul 2017 17:12
URI: http://eprints.nottingham.ac.uk/id/eprint/43874

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