Numerical study on laminar convection heat transfer in a channel with longitudinal vortex generator. Part B: Parametric study of major influence factors

Wu, Jiangbo; Tao, Wen‐Quan

doi:10.1016/j.ijheatmasstransfer.2007.03.031

Cited by 142 publications

(60 citation statements)

References 15 publications

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“…Although the total control volume element number used in the present study (up to 600,000 elements) seems to be lower than that of the models used in comparison, the geometrical dimensions of the models used in comparison are also much greater than those of the models used in the numerical investigation of the present study. Additionally the wind tunnel channel dimensions investigated in [23] are also noticeably greater than the distance between the fins (2.6 mm) and the width of one tenth fin segment (17.5 mm) investigated in this study. Thus, it can be easily said that the mesh quality of the models investigated in the present study is significantly finer.…”

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 67%

“…Since the fins considered by other researchers differ from the ones investigated in the present study, it was not possible to compare directly the numerical results found for the investigated cases with numerical and experimental results given by other authors. For this reason, the fins used in a similar study [23], in which the effects of a winglet pair on heat transfer are investigated numerically and experimentally, are analyzed numerically in order to accomplish validation of the current study.…”

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

“…In the experimental part of the mentioned study [23], aluminum fins with a length of 400 mm are tested in a thermally isolated wind tunnel for different air velocity values. The winglet dimensions are 60 mm length and 27 mm height.…”

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

“…A 0.15 mm thick electrical heating element is placed between two aluminum plates, each with a 1 mm thickness. The total heating power dissipated by the heating film is 35 W. The experimental average convective heat transfer coefficients over the upper and lower fin surfaces (h) are determined and additionally computational results for h for the investigated fins are presented in [23]. The fin with a 45 angle of attack is modeled for the comparison, because this is the winglet angle of attack value for the investigated fins in the present study.…”

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

“…Their results indicated that the highest performance can be achieved when the winglets have a 45 o angle of attack. Wu and Tao [23] continued their numerical study and investigated the winglet pair effect for a laminar flow in a channel using the field synergy principle. Tian et al [24] made numerical simulations investigating the effects of rectangular and delta winglet pairs placed on a flat plate channel laminar flow.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Numerical optimization of a fin-tube gas to liquid heat exchanger

Bilir

İlken

Erek

2012

International Journal of Thermal Sciences

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Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 67%

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

Section: Verification Of the Numerical Models Used In The Present Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical optimization of a fin-tube gas to liquid heat exchanger

Bilir

İlken

Erek

2012

International Journal of Thermal Sciences

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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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Turbulent heat transfer enhancement in a triangular duct using delta‐winglet vortex generators

Althaher

Abdul-Rassol

Ahmed

et al. 2011

Heat Trans. Asian Res.

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The augmentation of convective heat transfer of a turbulent flow using deltawinglet vortex generators (VG) in a triangular duct was experimentally investigated. Two side walls of the heated test section are electrically heated with a constant heat flux while the lower wall is indirectly heated. Single, double, and triple pairs of VG are utilized. Each pair of VG was punched on one wall of the test duct. The effects of the number of VG pairs, the VG angle of attack, the VG location from the leading edge of the test duct, the VG geometry, and Reynolds number are examined in this paper. The results indicate that the Nusselt number and friction factor are relatively proportional to the size, number, and the inclination angle of the VG. The Nusselt number increases and the friction factor decreases as the Reynolds number increases. The present results were compared with the available literature and they show good agreement. Correlation equations of Nusselt number and friction factor for turbulent flow are developed, for the cases studied, as a function of Reynolds number and VG angle of attack.

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Numerical study on laminar convection heat transfer in a channel with longitudinal vortex generator. Part B: Parametric study of major influence factors

Cited by 142 publications

References 15 publications

Numerical optimization of a fin-tube gas to liquid heat exchanger

Numerical optimization of a fin-tube gas to liquid heat exchanger

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

Turbulent heat transfer enhancement in a triangular duct using delta‐winglet vortex generators

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