Volume 4, Issue 1 (9-2023)
jste 2023, 4(1): 56-66 |
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Hassani Z, Pouranfard A, Karimi H. (2023). Laboratory study of drag reduction and heat transfer improvement in vertical pipe using crude oil/nanosilica/Polyisobutylene polynanofluids. jste. 4(1), : 6
URL: http://yujs.yu.ac.ir/jste/article-1-118-en.html
URL: http://yujs.yu.ac.ir/jste/article-1-118-en.html
Yasouj university , r.pouranfard@yu.ac.ir
Abstract: (76 Views)
In this study, the effect of adding polyisobutylene (PIB) as drag reducing agent (DRA) and nanoSiO2 particles as heat transfer enhancer to crude oil, separately and also the simultaneous addition of these materials to crude oil as poly-nanofluids (PNFs) in a vertical pipe and under constant heat flux conditions is investigated. The use of drag reducers is one of the most important and simplest methods to overcome some of the energy losses during fluid transpotation. The aim of this study is to investigate the effects of PIB solution and crude oil/silica nanofluid, separately and also the simultaneous effect of adding these two materials, called polyanofluid, on heat transfer and drag reduction in a vertical pipe. In order to make PNFs, polymer-based solutions with concentrations of 10-30 ppm are prepared. Then, nanoSiO2 with concentrations of 0.1-0.5wt% are added to the base fluid. The experiments were performed in the range of Reynolds 5800-8700 and temperature was 25°C. Experimental conclusions predicted that with increasing Reynolds number, temperature and concentration, Nusslet number and heat transfer rate in supplied nanofluids and PNFs enhanced with nanoparticle concentrations, while PIB concentration cause to reduce thermal propertied and improve the tribological properties of prepared PNFs. This occurrence can be attributed to the formation of the polymeric layer around the nanosilica particles.
Article number: 6
Keywords: Heat transfer, Upward vertical flow, Drag reduction, Crude oil, Crude oil/nanosilica/PIB polynanofluids
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