Experimental study of Al2O3/water nanofluid turbulent heat transfer enhancement in the horizontal double pipes fitted with modified twisted tapes

Maddah, Heydar; Alizadeh, Mostafa; Ghasemi, Nahid; Alwi, Sharifah Rafidah Wan

doi:10.1016/j.ijheatmasstransfer.2014.07.059

Cited by 102 publications

(23 citation statements)

References 45 publications

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“…were obtained by diluting the concentrated nanofluids with calculated amounts of deionized water. The corresponding volume concentrations are 0.56% vol., 1.02% vol., 1.5% vol., 1 nanofluid was mechanically mixed for 30 min, followed by ultrasonic oscillation for 4 h. Marginal sedimentation in the prepared Al 2 O 3 /water nanofluids was noticed after two weeks. The MWCNT suspension was purchased from Nanocyl, Belgium and prepared by dispersing 97% mass fraction MWCNTs in de-ionized (DI) water.…”

Section: Nanofluid Preparation and Propertiesmentioning

confidence: 99%

“…Therefore, many efforts have been devoted to improving the heat transfer equipment design and enhancing the heat transfer performance of working fluids [1]. The plate heat exchanger (PHE) is widely used in many applications including food processing, heating and cooling applications and chemical industry for its high efficiency (high heat transfer coefficient) and compactness (low volume/surface ratio) [2,3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pressure drop and convective heat transfer of Al2O3/water and MWCNT/water nanofluids in a chevron plate heat exchanger

Huang

Sundén

2015

International Journal of Heat and Mass Transfer

127

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Section: Nanofluid Preparation and Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pressure drop and convective heat transfer of Al2O3/water and MWCNT/water nanofluids in a chevron plate heat exchanger

Huang

Sundén

2015

International Journal of Heat and Mass Transfer

127

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“…39,40 In recent years, efforts have been made to enhance heat transfer performance of heat exchangers. The applied methods mostly include creation of turbulent flow, 41,42 use of fins, twisters, and baffles. [43][44][45] An obstacle in heat transfer improvement of heat exchangers is the limited thermal properties of conventional coolants.…”

Section: Inside Heat Exchangersmentioning

confidence: 99%

A survey on experimental and numerical studies of convection heat transfer of nanofluids inside closed conduits

Safaei

Shadloo

Goodarzi

et al. 2016

Advances in Mechanical Engineering

105

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Application of nanofluids in heat transfer enhancement is prospective. They are solid/liquid suspensions of higher thermal conductivity and viscosity compared to common working fluids. A number of studies have been performed on the effect of nanofluids in heat transfer to determine the enhancement of properties in addition to rearrangement of flow passage configurations. The principal objective of this study is to elaborate this research based on natural, forced, and the mixed heat transfer characteristics of nanofluids exclusively via convection for single-and two-phase mixture models. In this study, the convection heat transfer to nanofluids has been reviewed in various closed conduits both numerically and experimentally.

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“…Despite, heat transfer enhanced for tubes with center cleared twisted tapes, because of applying a proper center clearance ratio. An experimental study of Al 2 O 3 -water nanofluid on turbulent heat transfer increment in horizontal double pipes fitted with modified twisted tapes was carried out by Maddah et al [14]. It indicated that by using the reducer geometrical progression ratio twisted tape, the friction factor and heat transfer coefficient both rises in compared with the tube with regular twisted tapes and nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on heat transfer and nanofluid flow in pipes fitted with different dimpled spiral center plate

Khouzestani

Ghafouri

2020

SN Appl. Sci.

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This research presents a numerical study on heat transfer and flow characteristics for two pipe fitted by two different dimpled spiral center plate by utilizing Al 2 O 3 , CuO and TiO 2 nanofluids as cooling fluids. Considering the effect of dimples arrangement, nanoparticle diameter d p , nanofluids volume fraction φ and also the heat transfer coefficient, thermal property. Average amount of entropy generation S a and maximum local temperature of wall T max were discussed. Results demonstrate that the in-line arrangement geometry behaves better in compare to the geometry with the staggered arrangement. 47.3% is the maximum enhancement of convection heat transfer for the in-line arrangement in compare with the smooth spiral central plate with base flow. Using nanofluids improved the wall temperature distribution, and using nanofluid caused great improvement in thermal conductivity with a little raise in dynamic viscosity. Using nanofluids caused a considerable decrease in S a , which also as the result of rising φ, and S a maximum reduction is about 24.7%. T max considerably declines by using nanofluids and enhanced by a rising φ. Also, CuO-water nanofluid has a better effect on heat transfer and flow characteristics than the other nanofluids.

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Experimental study of Al2O3/water nanofluid turbulent heat transfer enhancement in the horizontal double pipes fitted with modified twisted tapes

Cited by 102 publications

References 45 publications

Pressure drop and convective heat transfer of Al2O3/water and MWCNT/water nanofluids in a chevron plate heat exchanger

Pressure drop and convective heat transfer of Al2O3/water and MWCNT/water nanofluids in a chevron plate heat exchanger

A survey on experimental and numerical studies of convection heat transfer of nanofluids inside closed conduits

Numerical study on heat transfer and nanofluid flow in pipes fitted with different dimpled spiral center plate

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