Laminar mixed convective heat transfer enhancement by using Ag-TiO2-water hybrid Nanofluid in a heated horizontal annulus

Benkhedda, Mohamed; Boufendi, Toufik; Touahri, Sofiane

doi:10.1007/s00231-018-2302-x

Cited by 45 publications

(12 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In some studies, the enhanced performance was attributed to a higher Nusselt number. The Nusselt number can be improved with the use of hybrid nanofluids to make convective heat transfer more efficient [125,126].…”

Section: Efficiency Observations Of Solar Collectors With Hybrid Nano...mentioning

confidence: 99%

A Comprehensive Review on Efficiency Enhancement of Solar Collectors Using Hybrid Nanofluids

et al. 2022

View full text Add to dashboard Cite

Because of its potential to directly transform solar energy into heat and energy, without harmful environmental effects such as greenhouse gas emissions. Hybrid nanofluid is an efficient way to improve the thermal efficiency of solar systems using a possible heat transfer fluid with superior thermo-physical properties. The object of this paper is the study the latest developments in hybrid applications in the fields of solar energy systems in different solar collectors. Hybrid nanofluids are potential fluids with better thermo-physical properties and heat transfer efficiency than conventional heat transfer fluids (oil, water, ethylene glycol) with single nanoparticle nanofluids. The research found that a single nanofluid can be replaced by a hybrid nanofluid because it enhances heat transfer. This work presented the recent developments in hybrid nanofluid preparation methods, stability factors, thermal improvement methods, current applications, and some mathematical regression analysis which is directly related to the efficiency enhancement of solar collector. This literature revealed that hybrid nanofluids have a great opportunity to enhance the efficiency of solar collector due to their noble thermophysical properties in replace of conventional heat transfer working fluids. Finally, some important problems are addressed, which must be solved for future study.

show abstract

Section: Efficiency Observations Of Solar Collectors With Hybrid Nano...mentioning

confidence: 99%

A Comprehensive Review on Efficiency Enhancement of Solar Collectors Using Hybrid Nanofluids

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Very recently, a new type of nanofluid, known as hybrid nanofluid, which consists of a mixture of two different nanoparticles suspended in the base fluid has been discovered by the researchers [21][22][23][24]. Superior thermal characteristics of hybrid nanofluids have not only been declared it to be the most emerging heat transfer fluid but also the most fascinating one for future studies.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analysis of Laminar Mixed Convective Flow of Ag-TiO2-Water Hybrid Nanofluid in a Horizontal Annulus

Albeshri

Islam

Bokhary

et al. 2021

CFDL

View full text Add to dashboard Cite

Nanofluids occupy a large place in many fields of technology due its improved heat transfer and pressure drop characteristics. Very recently, a new type of nanofluid, known as hybrid nanofluid, which consists of a mixture of two different nanoparticles suspended in the base fluid has been found to be the most emerging heat transfer fluid. It is well also established that entrance region effect enhances heat transfer rate. The present study deals with numerical investigations of the hydrodynamic behavior of the laminar mixed convective flow of a hybrid nanofluid in the entrance region of a horizontal annulus. A thermal boundary condition of uniform heat flux at the inner wall and an adiabatic outer wall is selected. The SIMPLER numerical algorithm is adopted in the present study. The hybrid nanofluid consists of water as base fluid and Ag-TiO2 as nanoparticles. The ratio of Ag to TiO2 is maintained as 1:3. The objective of the current study is mainly to analyze the hydrodynamic behavior hybrid nanofluid in the entrance region. The investigation reveals that the effect of the secondary flow due to the buoyancy forces is more intense in the upper part of the annular cross-section. It increases throughout the cross-section until its intensity reaches a maximum and then it becomes weak far downstream. The development of axial flow and temperature field is strongly influenced by the buoyancy forces.

show abstract

“…Lu and Wang 46 experimentally investigated the thermal convection characteristics of water flowing in a narrow annulus. Benkhedda et al 47 have compared the laminar mixed convective heat transfer enhancement between a hybrid nanofluid and nanofluid in an annulus subject heat flux condition. In their studies, they developed new Nusselt number correlations for TiO 2 ‐based nanoliquid and Ag–TiO 2 ‐based hybrid nanoliquid in terms of the study parameters.…”

Section: Introductionmentioning

confidence: 99%

Toward the thermohydrodynamic behavior of a nanofluid containing C‐MWCNTs flowing through a 3D annulus channel under constant imposed heat flux

2021

View full text Add to dashboard Cite

The heat transport and friction factor in a three‐dimensional horizontal concentric annular duct filled with nanofluids comprising clove‐treated multiwalled carbon nanotubes are investigated numerically in this paper. The cylinder's outer surface is thermally insulated, while uniform heat flux is imposed on the cylinder's inner surface. The problem is formulated in dimensionless cylindrical coordinates. The numerical solutions were obtained based on the finite volume technique with second‐order precision, and cover a range of the Reynolds number 1000 ≤ Re ≤ 2000 and nanoparticle weight fractions 0.075, 0.125, and 0.175 wt%. To describe the results for both heat exchange and fluid flow performance, the temperature profile, Nusselt number, heat transfer coefficient, and friction factor are represented. The findings state that heat transport increases as Reynolds is increased and nanoparticles are introduced. The friction factor was also observed to improve as the concentration of nanoparticles increased. In addition, two new Nusselt number and friction factor correlations were established.

show abstract

Laminar mixed convective heat transfer enhancement by using Ag-TiO2-water hybrid Nanofluid in a heated horizontal annulus

Cited by 45 publications

References 41 publications

A Comprehensive Review on Efficiency Enhancement of Solar Collectors Using Hybrid Nanofluids

A Comprehensive Review on Efficiency Enhancement of Solar Collectors Using Hybrid Nanofluids

Hydrodynamic Analysis of Laminar Mixed Convective Flow of Ag-TiO2-Water Hybrid Nanofluid in a Horizontal Annulus

Toward the thermohydrodynamic behavior of a nanofluid containing C‐MWCNTs flowing through a 3D annulus channel under constant imposed heat flux

Contact Info

Product

Resources

About