An analytical study of the periodic laminar forced convection of non-Newtonian nanofluid flow inside an elliptical duct

Ragueb, Haroun; Mansouri, Kacem

doi:10.1016/j.ijheatmasstransfer.2018.07.051

Cited by 26 publications

(11 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Today, the potential for energy demand is increasing and to improve the performance and the efficiency of thermal devices, several solutions have been considered. Among the solutions proposed to improve the heat transfer rate, either by increasing the heat exchange surface by adding internal or external fins [1,2], or the use of corrugated tubes [3] and elliptical tubes [4]. However, the fluids used in the heat transfer fields such as water, ethylene glycol, and motor oil have weak thermal conductivity compared to solid materials.…”

Section: Introductionmentioning

confidence: 99%

Analytical Solution of Non-Newtonian Nanofluid Flows Within Circular Duct under Convective Boundary Condition

Tahiri¹,

Mansouri²,

Kouider³

et al. 2021

MMEP

Self Cite

View full text Add to dashboard Cite

At the outset, this work aims to carried out an analytical investigation of forced convection by establishing a laminar flow into circular duct under convective boundary conditions of the third type for non-Newtonian nanofluid, the fluid containing TiO2 uniformly dispersed in aqueous solution with 0.5wt% of CMC solutions (Carboxymethyl Cellulose) is used as working fluid. The viscous dissipation effects are taken into account, the employed methodology is based on a combination of the Ritz variational approach with the Laplace transformation technique, so the power-law fluids flow model is used to describe the non-Newtonian fluid behavior. The effect of dimensionless parameters such as Biot (Bi), Brinkman (Br), Peclet (Pe) numbers, power-law index (n), and nanoparticles concentration (φ) on the temperature distribution contours and on the examined local Nusselt number. Our results have been compared with those found in the literature in particular the cases of base fluids (φ=0) with and without viscous dissipation effects.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytical Solution of Non-Newtonian Nanofluid Flows Within Circular Duct under Convective Boundary Condition

Tahiri¹,

Mansouri²,

Kouider³

et al. 2021

MMEP

Self Cite

View full text Add to dashboard Cite

show abstract

“…Compared with a circular duct, a better thermal efficiency can be found in an elliptical passage because the perimeter of an elliptical configuration is wider than the other for the same cross-sectional area [19]. Generally, the elliptical channel heat sinks design can significantly reduce the size and weight of the apparatus [20]. Furthermore, it is worth noting that the elliptical shape is very common in current mini- and micro-devices since it can be easily manufactured with micro-drilling techniques or chemical etching.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicated that the value of the fully developed Nusselt number increases with the aspect ratio. They further studied the laminar forced convection of non-Newtonian nanofluids in elliptical ducts using the generalized integral transform technique under the same wall boundary condition [20]. Their results demonstrated that the heat transfer coefficient can be improved dramatically when reducing aspect ratio and increasing nanoparticle concentration.…”

Section: Introductionmentioning

confidence: 99%

Thermally Developing Flow and Heat Transfer in Elliptical Minichannels with Constant Wall Temperature

Duan

et al. 2019

Micromachines

View full text Add to dashboard Cite

Laminar convective heat transfer of elliptical minichannels is investigated for hydrodynamically fully developed but thermal developing flow with no-slip condition. A three-dimensional numerical model is developed in different elliptical geometries with the aspect ratio varying from 0.2 to 1. The effect of Reynolds number (25 ≤ Re ≤ 2000) on the local Nusselt number is examined in detail. The results indicate that the local Nusselt number is a decreasing function of Reynolds number and it is sensitive to Reynolds number especially for Re less than 250. The effect of aspect ratio on local Nusselt number is small when compared with the effect of Reynolds number on local Nusselt number. The local Nusselt number is independent of cross-section geometry at the inlet. The maximum effect of aspect ratio on local Nusselt number arises at the transition section rather than the fully developed region. However, the non-dimensional thermal entrance length is a monotonic decreasing concave function of aspect ratio but a weak function of Reynolds number. Correlations for the local Nusselt number and the thermal developing length for elliptical channels are developed with good accuracy, which may provide guidance for design and optimization of elliptical minichannel heat sinks.

show abstract

“…He indicated that heat transfer co-efficient is dependent of frequency of oscillations. Periodic variations of temperature through ducts was studied by Haroun Ragueb, Kacem Mansouri [6]. They found that amplitude of temperature oscillations is dependent on wall heat flux.…”

Section: Introductionmentioning

confidence: 99%

Oscillating Flows in Circular Pipes

2019

IJITEE

View full text Add to dashboard Cite

Pulsation flows in pipes heated externally produces oscillating temperature field. This type of unsteady flow happens in heat exchangers. Simulating this type of flows is complex in engineering. In this present study the field variables like velocity and temperature are calculated by numerical control volume scheme. Velocity pulsation is applied at inlet of pipe to produce oscillations. Simulation variables like lengths, diameter and thickness of the pipe are considered as parameters for this study. Also additionsl structural constraints has been added to see how it influences effective thermal stresses.

show abstract

An analytical study of the periodic laminar forced convection of non-Newtonian nanofluid flow inside an elliptical duct

Cited by 26 publications

References 70 publications

Analytical Solution of Non-Newtonian Nanofluid Flows Within Circular Duct under Convective Boundary Condition

Analytical Solution of Non-Newtonian Nanofluid Flows Within Circular Duct under Convective Boundary Condition

Thermally Developing Flow and Heat Transfer in Elliptical Minichannels with Constant Wall Temperature

Oscillating Flows in Circular Pipes

Contact Info

Product

Resources

About