Laminar Convective Heat Transfer and Pressure Drop of TiO2/Turbine Oil Nanofluid

Farshad, Farzin; Heris, Saeed Zeinali; Rahimi, Sadegh

doi:10.2514/1.t3935

Cited by 26 publications

(8 citation statements)

References 30 publications

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“…The results of the study showed that the addition of non-covalently functionalized CNTsbased water nanofluids improved the heat transfer coefficient compared to pure water. The statement you provided suggests that Heris et al 15,[30][31][32][33] conducted a study on the heat transfer properties of turbine oil-based nanofluids inside a circular tube. The study likely involved measuring various heat transfer parameters such as heat transfer coefficient, [34][35][36] pressure drop, and thermal conductivity of the nanofluid in the circular tube.…”

Section: Introductionmentioning

confidence: 99%

“…The study likely involved measuring various heat transfer parameters such as heat transfer coefficient, [34][35][36] pressure drop, and thermal conductivity of the nanofluid in the circular tube. The statement you provided suggests that the study conducted by Heris et al 13,15,30,33 found that the addition of TiO 2 nanoparticles to turbine oil improved its heat transfer properties. Specifically, the study found that the heat transfer coefficient and pressure drop of the turbine oil increased, which indicates that the oil was more efficient at transferring heat.…”

Section: Introductionmentioning

confidence: 99%

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Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Pandey,

Tiwari,

Paliwal

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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A combined experimental and theoretical study on thermal conductivity, heat transfer specific heat, and electronic properties has been done for doped CeO2/water nanofluid. First, the sol-gel method was implemented for the synthesis of doped CeO2 nanoparticles and then a mixture of nanoparticles with different concentrations of nanofluid. X-ray diffraction and SEM analysis confirm the structural phase purity and homogeneous mixing of nanofluids. Experimental thermal conductivity and specific heat of pure and 4f-doped CeO2 were estimated and found very close to our theoretical calculations. Experimental investigations have been carried out for the measurement of heat transfer using pure and doped CeO2/water nanofluid as the coolant. The experiments were aimed at determining the heat transfer and other thermal properties with different concentrations and with various fluid with Reynolds number 2500 and 3500. The heat transfer coefficient of nanofluids increases not only with an increase in the volume flow rate of the hot water but also increases with increase in the atomic number of dopant elements in CeO2. Electronic states show variation in band gap with doping which may also play an important role in the improvement of solar collectors. It is clear from experimental and theoretical findings that the thermal and electronic properties depend on number of valance electrons. Hence doping of 4f-element in CeO2 plays a vital role to increase the thermal conductivity and tuning of electronic properties leads to many applications in thermal sensors and solar cell-based industries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Pandey,

Tiwari,

Paliwal

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Hybrid nanofluids have also attracted the attention of researchers due to the possibility of having enhanced heat transfer and thermal properties. [12][13][14][15][16][17] With a volume concentration of less than 0.50%, Farzin et al 18 found that by adding TiO 2 to the nanoturbine oil, the heat transfer, pressure-drop, and quality of the turbine oil would increase, while Mansour et al 19 used Al 2 O 3 -Cu/water hybrid nanofluid to study the entropy generation in a square porous cavity. Han et al 20 produced a hybrid sphere/CNT nanoparticle with CNTs attached at the surface of spherical oxide nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on frequency pulsation effects on a single pass plate heat exchanger performance

Alasady

Maghrebi

2022

Heat Trans

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This paper investigates combined heat transfer improvement methods. These methods include introducing pulsating flow, adding nanofluids, and manipulating the flow's characteristics in a corrugated plate heat exchanger. Tests are carried out with multi‐walled carbon nanotube (MWCNT), graphene nanoplate (GNP), and a mixture of GNP and MWCNT meeting the requirement of 0.01% nanofluids volume fraction and exposed to pulsation. Results demonstrated that the use of pulsating frequencies from 0 to 30 Hz of GNP‐water, MIX nanofluids–water, and MWCNT–water nanofluids with a constant concentration of 0.01 wt% leads to a significant improvement in heat transfer. Using pure water at frequency f = 0 Hz as a benchmark, the Nusselt number of the mixture nanofluid increases by 15.2%, 27.5%, 40.4%, and 52.8% with the increase of frequency pulsation from 0 to 30 Hz with a slight effect on the pressure‐drop at this low used constant nanofluid concentration = 0.01%. The highest Nusselt number value for GNP‐water nanofluid improved by an amount of 58.3% at the highest frequency compared with pure water at f = 0 Hz.

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“…One of the reasons is due to the thermal conductivity of metal and metal oxide particles exhibits much higher thermal conductivity than those of the basefluids [4,5]. However, due to the weak stability of microfluids (the mixing of micro size particle with basefluid), their applications have not been feasible over the past decade.…”

Section: Introductionmentioning

confidence: 99%

“…Different nanoparticles such as copper oxide (CuO), aluminum oxide (Al 2 O 3 ), titanium dioxide (TiO 2 ) and etc. have been used to produce nanoÀuids for heat transfer enhancement [5,14]. Lee et al.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of heat transfer to separation tio₂/water nanofluids flow in an asymmetric abrupt expansion

Oon

Yew

Chew

et al. 2015

EPJ Web of Conferences

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Abstract. Flow separation and reattachment of 0.2% TiO 2 nanofluid in an asymmetric abrupt expansion is studied in this paper. Such flows occur in various engineering and heat transfer applications. Computational fluid dynamics package (FLUENT) is used to investigate turbulent nanofluid flow in the horizontal doubletube heat exchanger. The meshing of this model consists of 43383 nodes and 74891 elements. Only a quarter of the annular pipe is developed and simulated as it has symmetrical geometry. Standard k-epsilon second order implicit, pressure based-solver equation is applied. Reynolds numbers between 17050 and 44545, step height ratio of 1 and 1.82 and constant heat flux of 49050 W/m 2 was utilized in the simulation. Water was used as a working fluid to benchmark the study of the heat transfer enhancement in this case. Numerical simulation results show that the increase in the Reynolds number increases the heat transfer coefficient and Nusselt number of the flowing fluid. Moreover, the surface temperature will drop to its lowest value after the expansion and then gradually increase along the pipe. Finally, the chaotic movement and higher thermal conductivity of the TiO 2 nanoparticles have contributed to the overall heat transfer enhancement of the nanofluid compare to the water.

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Laminar Convective Heat Transfer and Pressure Drop of TiO2/Turbine Oil Nanofluid

Cited by 26 publications

References 30 publications

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Experimental investigation on frequency pulsation effects on a single pass plate heat exchanger performance

Numerical simulation of heat transfer to separation tio₂/water nanofluids flow in an asymmetric abrupt expansion

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Laminar Convective Heat Transfer and Pressure Drop of TiO2/Turbine Oil Nanofluid

Cited by 26 publications

References 30 publications

Doped CeO2/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Doped CeO2/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Experimental investigation on frequency pulsation effects on a single pass plate heat exchanger performance

Numerical simulation of heat transfer to separation tio2/water nanofluids flow in an asymmetric abrupt expansion

Contact Info

Product

Resources

About

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Doped CeO₂/water nanofluids analyzed the performance of thermal conductivity and heat transfer: An experimental and theoretical investigations

Numerical simulation of heat transfer to separation tio₂/water nanofluids flow in an asymmetric abrupt expansion