Experimental study on heat transfer enhancement of wavy finned flat tube with longitudinal vortex generators

Du, Xiaoze; Feng, Li Ying; Yang, Yongping; Yang, Linlin

doi:10.1016/j.applthermaleng.2012.05.024

Cited by 68 publications

(23 citation statements)

References 18 publications

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“…Gong et al (2013) and Du et al (2014) numerically studied on flow and heat transfer behaviors in wavy fin-and-tube heat exchanger with combined longitudinal vortex generators. The experimental investigation on thermo-hydraulic performance in wavy finand-tube heat exchanger with combined longitudinal vortex generators was also reported by Du et al (2013). Ahmed et al (2015) numerically investigated on heat transfer augmentation in a wavy channel.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional Numerical Investigation on Laminar Forced Convection and Heat Transfer in a Circular Tube Inserted With Right Triangular Wavy Surfaces

Jedsadaratanachai¹,

Boonloi²

2017

Frontiers in Heat and Mass Transfer

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As the results, the wavy surface can generate the vortex flow and impinging flow through the test section that helps to improve the heat transfer rate and thermal performance. The impingement of the flow on the tube wall disturbs the thermal boundary layer that is an important factor to enhance the heat transfer rate. The V-Downstream wavy surface can create the highest strength of the impinging flow that leads to the highest heat transfer rate. In the range investigate, the augmentations are around 1.2 -7.6 and 4 -43.6 times above the smooth tube for the heat transfer and friction loss, respectively. In addition, the optimum thermal enhancement factor, TEF, is around 2.42 for the V-Downstream wavy surface at α = 30 o and Re = 2000.

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Section: Introductionmentioning

confidence: 99%

“…They said that the V-shaped wavy channel has advantage for using nanofluid. Yang et al (2013) numerically studied the heat transfer enhancement in a wavy channel. The influences of the wavy amplitude and the wavy number were presented.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Numerical Investigation on Laminar Forced Convection and Heat Transfer in a Circular Tube Inserted With Right Triangular Wavy Surfaces

Jedsadaratanachai¹,

Boonloi²

2017

Frontiers in Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…The wavy surface can increase the strength of the flow in the heat exchanger. The combinations between wavy fin and the other types of the turbulators in the fin-and-tube heat exchanger had been reported by many researchers [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Effect of Flow Attack Angle for V-Wavy Plate on Flow and Heat Transfer in a Square Channel Heat Exchanger

Boonloi

Jedsadaratanachai

2018

Journal of Engineering

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Effects of flow attack angles of the V-wavy plate on flow and heat transfer in a square channel heat exchanger are investigated numerically. The V-wavy plates with V-tips pointing downstream and upstream called V-Downstream and V-Upstream, respectively, are examined for the Reynolds number in the range of 3000-10,000. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The numerical results are presented in terms of flow and heat transfer visualization. The thermal performance analysis is also concluded in the form of Nusselt number ratio (Nu/Nu 0 ), friction factor ratio ( / 0 ), and thermal enhancement factor (TEF). The numerical result shows that the wavy plate can induce the swirling flow through the test section for all cases. The swirling flow disturbs the thermal boundary layer on the channel wall which is the reason for heat transfer enhancement. In range studies, the heat transfer rate increases around 3-6.5 and 2.8-6 times above the smooth channel for VDownstream and V-Upstream, respectively. The optimum TEF is found at = 20 ∘ and Re = 3000 to be around 2.09 for V-Upstream case.

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“…They found that the best thermal performance of the system is around 1.23. Du et al (2013) experimentally studied the flow pattern in a wavy fin-and-flat-tube heat exchanger at Re = 1500-4500. They stated that the Nusselt number and friction factor are around 21-60 and 13-83%, respectively, while the thermal performance is around 1.31.…”

Section: Introductionmentioning

confidence: 99%

Laminar Flow and Heat Transfer in a Square Channel Installed with Inclined Wavy Surface

Boonloi¹,

Jedsadaratanachai²

2017

Journal of Mathematics and Statistics

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Laminar flow and heat transfer characteristic in a square channel heat exchanger installed with inclined wavy surface are investigated numerically. The inclined wavy surface is designed with the main the aim to help the installation, production and maintenance when using the inclined wavy surface in the heat exchanger. The finite volume method with SIMPLE algorithm is selected to solve the present problem. The effects of flow attack angle (α = 15°-60°) and Reynolds number (Re = 100-1200) on heat transfer, friction loss and thermal performance are considered. The numerical model is validated with the smooth channel. The grid independence of the computational domain is checked. The numerical results show that the heat transfer enhancement is around 1.9-7.5 times above the smooth channel. The optimum thermal performance is found at the flow attack angle of 45° around 2.35 at Re = 1200.

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Experimental study on heat transfer enhancement of wavy finned flat tube with longitudinal vortex generators

Cited by 68 publications

References 18 publications

Three-Dimensional Numerical Investigation on Laminar Forced Convection and Heat Transfer in a Circular Tube Inserted With Right Triangular Wavy Surfaces

Three-Dimensional Numerical Investigation on Laminar Forced Convection and Heat Transfer in a Circular Tube Inserted With Right Triangular Wavy Surfaces

Effect of Flow Attack Angle for V-Wavy Plate on Flow and Heat Transfer in a Square Channel Heat Exchanger

Laminar Flow and Heat Transfer in a Square Channel Installed with Inclined Wavy Surface

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