A note on the flow and heat transfer enhancement in a channel with built-in winglet pair

Hiravennavar, Sadashiv; Tulapurkara, E. G.; Biswas, Gautam

doi:10.1016/j.ijheatfluidflow.2006.03.030

Cited by 72 publications

(32 citation statements)

References 7 publications

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“…In this study [2], turbulent flow was also analyzed using the k-ε model. Hiravennavar et al [3] investigated the flow structure and the average Nusselt number in a rectangular channel with a built-in winglet pair. The thickness of the winglet was also considered and the overall heat transfer of the channel was found to increase by 12.49% with a change in thickness to height ratio from zero to 0.2485.…”

Section: Heat Transfer-asian Research 39 (3) 2010mentioning

confidence: 99%

Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger

Sachdeva

Kasana

Vasudevan

2010

Heat Trans. Asian Res.

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The present numerical analysis pertains to the heat transfer enhancement in a plate-fin heat exchanger employing triangular shaped fins with a rectangular wing vortex generator on its slant surfaces. The study has been carried out for three different angles of attack of the wing, i.e., 15°, 20° and 26°. The aspect ratio of the wing is not varied with its angle of attack. The flow considered herein is laminar, incompressible, and viscous with the Reynolds number not exceeding 200. The pressure and the velocity components are obtained by solving the continuity and the Navier-Stokes equations by the Marker and Cell method. The present analysis reveals that the use of a rectangular wing vortex generator at an attack angle of 26° results in about a 35% increase in the combined spanwise average Nusselt number as compared to the plate-triangular fin heat exchanger without any vortex generator.

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Section: Heat Transfer-asian Research 39 (3) 2010mentioning

confidence: 99%

Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger

Sachdeva

Kasana

Vasudevan

2010

Heat Trans. Asian Res.

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“…The results showed that the average Nusselt number increases by about 46% while the local heat transfer coefficient increases by several times. Hiravennavar et al [16] numerically studied a delta winglet pair of non-zero thickness in a hydrodynamically developed and thermally developing laminar channel flow and observed that the heat transfer is enhanced by 33% when single delta winglet is used and 67% when a winglet pair is used.…”

Section: Relevant Studiesmentioning

confidence: 99%

Computation of heat transfer enhancement in a plate‐fin heat exchanger with triangular inserts and delta wing vortex generator

Sachdeva

Vasudevan²,

Kasana

2010

Numerical Methods in Fluids

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SUMMARYLongitudinal vortices disrupt the growth of the thermal boundary layer, thereby the vortex generators producing the longitudinal vortices are well known for the enhancement of heat transfer in compact heat exchangers. The present investigation determines the heat transfer characteristics with secondary flow analysis in plate fin triangular ducts with delta wing vortex generators. This geometrical configuration is investigated for various angles of attack of the wing i.e. 15 • , 20 • , 26 • and 37 • and Reynolds numbers 100 and 200. The constant wall temperature boundary condition is used. The solution of the complete Navier Stokes equation and the energy equation is carried out using the staggered grid arrangement. The performance of the combination of triangular secondary fins and delta wing with stamping on slant surfaces has also been studied.

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“…This mixing rate was stated by the mixing efficiency. Potential VG of winglet type in heat transfer enhancement in the channel by considering the thickness of the VG itself investigated by Hiravennavar et al [17]. Taking into account the VG thickness, heat transfer increased by 12.5%.…”

Section: Introductionmentioning

confidence: 99%

Effect of concave rectangular winglet vortex generator on convection coefficient of heat transfer

Syaiful¹,

Sugiri²,

Soetanto³

et al. 2017

AIP Conference Proceedings

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A note on the flow and heat transfer enhancement in a channel with built-in winglet pair

Cited by 72 publications

References 7 publications

Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger

Heat transfer enhancement by using a rectangular wing vortex generator on the triangular shaped fins of a plate‐fin heat exchanger

Computation of heat transfer enhancement in a plate‐fin heat exchanger with triangular inserts and delta wing vortex generator

Effect of concave rectangular winglet vortex generator on convection coefficient of heat transfer

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