Embedded vortices in internal flow: heat transfer and pressure loss enhancement

Fiebig, M.

doi:10.1016/0142-727x(95)00043-p

Cited by 249 publications

(91 citation statements)

References 11 publications

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“…Another review which proved to be of supreme importance in those days was the one presented by Martin Fiebig [6]. In this review he described three enhancement mechanisms as follows: (1) developing boundary layers on the vortex generator surface; (2) swirl; and (3) flow destabilization.…”

Section: Passive Vortex Methods: a Detailed Review On Recent Geomentioning

confidence: 99%

Review on Recent Progresses in Heat Transfer Enhancement Through the Use of Passive Vortex Generators and Its Applications in Solar Parabolic Trough Systems

2017

IJAERD

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Section: Passive Vortex Methods: a Detailed Review On Recent Geomentioning

confidence: 99%

Review on Recent Progresses in Heat Transfer Enhancement Through the Use of Passive Vortex Generators and Its Applications in Solar Parabolic Trough Systems

2017

IJAERD

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“…For example, as flow passes through an orifice in a rotating component its tangential or swirl velocity will change. The tangential velocity will affect vortex pressure losses and windage heating of the air in the system downstream of the orifice [1][2][3]. Thus the "velocity pick-up" of orifice flows is important, but there is little information available in the literature about how this might be estimated.…”

Section: Introductionmentioning

confidence: 99%

Velocity pick-up and discharge coefficient for round orifices with cross flow at inlet

Chew

Sun

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…In fin and tube heat exchanger often negligible heat transfer takes place in the downstream of the circular tube due to a low velocity fluid which can be enhanced by several hundred percent by placing VG in the wake region behind the tubes (Biswas et al , 1994;Joardar and Jacobi , 2008). Several experimental and numerical studies on different configurations of VGs have been carried out over the last two decades (Turk and Junkhan , 1986;Joardar and Jacobi , 2008;Tiggelbeck et al , 1992Tiggelbeck et al , , 1993Jacobi and Shah , 1995;Jang et al , 2013) including fin and tube heat exchangers (Fiebig , 1995;. However, most of the studies are commonly based on convective heat transfer analysis.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of conjugate heat transfer and flow performance of a fin and tube heat exchanger with vortex generators

Singh

Sørensen

2017

Linköping Electronic Conference Proceedings

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Vortex generator is considered as an effective device for augmentation of the thermal-hydraulic performance of a heat exchanger. The aim of present study is to examine the influence of vortex generators on a double fin and tube heat exchanger performance. Vortex generator of rectangular winglet type is chosen and investigated at different angles of attack 0 • , −10 • and −20 • with the flow direction. Three-dimensional numerical model is developed and simulations are performed for a Reynolds number range 5000 ≤ Re ≤ 11000 taking conjugate heat transfer into account. The heat transfer and pressure loss characteristics are determined and analyzed for an in-line configuration of a fin and tube heat exchanger. In order to evaluate the enhancement in the performance on an equitable basis, the heat exchanger with plain fin surface is considered as a reference design. Results show that the angle of attack of a vortex generator has a significant impact on the volume goodness factor, and enhance the thermal performance of a fin and tube heat exchanger in comparison to the design with plain fin. The vortex generator at an angle of attack −10 • is found to perform superior over the Reynolds number range studied. At Re = 5000, the vortex generator with an angle of attack −10 • increases the volume goodness factor by 32% with respect to the baseline heat exchanger design.

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Embedded vortices in internal flow: heat transfer and pressure loss enhancement

Cited by 249 publications

References 11 publications

Review on Recent Progresses in Heat Transfer Enhancement Through the Use of Passive Vortex Generators and Its Applications in Solar Parabolic Trough Systems

Review on Recent Progresses in Heat Transfer Enhancement Through the Use of Passive Vortex Generators and Its Applications in Solar Parabolic Trough Systems

Velocity pick-up and discharge coefficient for round orifices with cross flow at inlet

Numerical investigation of conjugate heat transfer and flow performance of a fin and tube heat exchanger with vortex generators

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