Novel design of delta winglet pair vortex generator for heat transfer enhancement

Oneissi, Mohammad; Habchi, Charbel; Russeil, S.; Bougeard, D.; Lemenand, Thierry

doi:10.1016/j.ijthermalsci.2016.05.025

Cited by 109 publications

(37 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their results indicated that WVGs could generate longitudinal and transverse vortices to induce both impingement flow and recirculation zone leading to higher heat transfer and comparatively lower pressure drop. Based on decreasing pressure drop, an innovative vortex generator configuration, named inclined projected winglet pair was examined by Oneissi et al Their design showed superior performance relative to the classical delta winglet pair.…”

Section: Introductionmentioning

confidence: 99%

A magnetic vortex generator for simultaneous heat transfer enhancement and pressure drop reduction in a mini channel

Bezaatpour

Goharkhah

2020

Heat Trans

View full text Add to dashboard Cite

An active vortex generator is proposed for heat transfer enhancement in heat sinks and heat exchangers and removal of highly concentrated heat fluxes. It is based on applying a uniform magnetic field of permanent magnets to a magnetic fluid (ferrofluid) flowing in a heated channel.Numerical simulations are carried out for a 2 Vol% ferrofluid at different Reynolds numbers (150-210) and magnetic field intensities (0-1400 G) to investigate the possibility of simultaneous heat transfer enhancement and pressure drop reduction by the proposed method. Comparisons are also made with the other conventional vortex generators. Results indicate that the external magnetic field acts as a vortex generator that changes the velocity distribution, improves the flow mixing, and thereby increases the convective heat transfer. Surprisingly, the heat transfer enhancement is accompanied by a decrease of the friction coefficient due to the flow separation and decrease of the flow contact with the surface. It is also concluded that increasing the magnetic field intensity, decreasing the flow rate, and adding a second identical magnetic vortex generator have favorable effects on both pressure drop and heat transfer. A maximum of 37.8% enhancement of heat transfer with a 29.18% reduction of pressure drop has been achieved at the optimum condition. K E Y W O R D S flow mixing, forced convection, heat transfer, magnetic field effect, magnetite ferrofluid, vortex generator

show abstract

Section: Introductionmentioning

confidence: 99%

A magnetic vortex generator for simultaneous heat transfer enhancement and pressure drop reduction in a mini channel

Bezaatpour

Goharkhah

2020

Heat Trans

View full text Add to dashboard Cite

show abstract

“…The performance ratio, (Nua/Nuc), based on equal pumping power and constant heat transfer area, has found to be in the range of 1.0 to 6.0. M. Oneissi et al [14] checked novel design of delta winglet pair vortex generator for heat transfer enhancement. numerical simulations are conducted for the classical delta winglet pair (DWP) which is introduced as the reference case in there study.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental & Analytical Investigation of Heat Transfer Improvement by using Wavy Delta Winglet in Inline & Staggered Arrangement over Flat Plate

Pendharkar¹

2019

IJRASET

View full text Add to dashboard Cite

Vortex generators are important heat transfer enhancers utilized now days to improve the performance of heat sinks. Wavy delta winglet is a novel vortex generator chosen for this study. In this study, experimental data for local heat transfer coefficients are presented for a plate with square cross section and wavy delta winglet vortex generators. Experiments are conducted to access turbulent forced convection heat transfer for air flow through a over a flat plate fitted with wavy delta winglet. Two arrangement namely in-line and staggered arrays, are checked. The flow rate is in terms Reynolds number based on hydraulic diameter of channel in range of 7000 to 24500. The analytical result shows a significant effect of presence of Wavy winglet on heat transfer rate over smooth flat plate.

show abstract

“…FLUENT has well-validated physical modelling capable of delivering fast, accurate results for multiphysics applications, and has been widely applied in numerical simulation and is considered to be a very powerful CFD tool. As shown in Table 2, most of the published CFD works in the past ten years have applied FLUENT software, for example, References [4,16,48,[77][78][79][80][82][83][84][85][86][87][89][90][91][92][93]95,96,100,103,[105][106][107].…”

Section: -9700mentioning

confidence: 99%

A Review of Airside Heat Transfer Augmentation with Vortex Generators on Heat Transfer Surface

Chai

Tassou

2018

Energies

View full text Add to dashboard Cite

Heat exchanger performance can be improved via the introduction of vortex generators to the airside surface, based on the mechanism that the generated longitudinal vortices can disrupt the boundary layer growth, increase the turbulence intensity and produce secondary fluid flows over the heat transfer surfaces. The key objective of this paper is to provide a critical overview of published works relevant to such heat transfer surfaces. Different types of vortex generator are presented, and key experimental techniques and numerical methodologies are summarized. Flow phenomena associated with vortex generators embedded, attached, punched or mounted on heat transfer surfaces are investigated, and the thermohydraulic performance (heat transfer and pressure drop) of four different heat exchangers (flat plate, finned circular-tube, finned flat-tube and finned oval-tube) with various vortex-generator geometries, is discussed for different operating conditions. Furthermore, the thermohydraulic performance of heat transfer surfaces with recently proposed vortex generators is outlined and suggestions on using vortex generators for airside heat transfer augmentation are presented. In general, the airside heat transfer surface performance can be substantially enhanced by vortex generators, but their impact can also be significantly influenced by many parameters, such as Reynolds number, tube geometry (shape, diameter, pitch, inline/staggered configuration), fin type (plane/wavy/composite, with or without punched holes), and vortex-generator geometry (shape, length, height, pitch, attack angle, aspect ratio, and configuration). The finned flat-tube and finned oval-tube heat exchangers with recently proposed vortex generators usually show better thermohydraulic performance than finned circular tube heat exchangers. Current heat exchanger optimization approaches are usually based on the thermohydraulic performance alone. However, to ensure quick returns on investment, heat exchangers with complex geometries and surface vortex generators, should be optimized using cost-based objective functions that consider the thermohydraulic performance alongside capital cost, running cost of the system as well as safety and compliance with relevant international standards for different applications.

show abstract

Novel design of delta winglet pair vortex generator for heat transfer enhancement

Cited by 109 publications

References 37 publications

A magnetic vortex generator for simultaneous heat transfer enhancement and pressure drop reduction in a mini channel

A magnetic vortex generator for simultaneous heat transfer enhancement and pressure drop reduction in a mini channel

Experimental & Analytical Investigation of Heat Transfer Improvement by using Wavy Delta Winglet in Inline & Staggered Arrangement over Flat Plate

A Review of Airside Heat Transfer Augmentation with Vortex Generators on Heat Transfer Surface

Contact Info

Product

Resources

About