Numerical investigation and thermal transfer on a wall corrugated without and with artificial roughness

被引：0

作者：

Ferhat R. ^{[1
]}

Dellil A.Z.D. ^{[2
]}

Hamidou M.-K. ^{[1
]}

机构：

[1] Faculté de Génié Mécanique, Université des Sciences et de la Technologie d'Oran, El-Mnaouar, Oran

[2] Institut de maintenance et de Sécurité Industrielle, ORAN

来源：

Defect and Diffusion Forum | 2019年 / 392卷

关键词：

Amplitude; Artificial Roughness; Corrugated Wall; Friction Coefficient; Nusselt Number; SST;

D O I：

10.4028/www.scientific.net/DDF.392.189

中图分类号：

学科分类号：

摘要：

The objective of this study is to give the designer an appreciation of the heat transfer enhancement in turbulent flows through corrugated channels in a heat plate exchanger. Precisely, the influence of a new technic named the artificial roughness is probed on corrugated walls, with their variable wall amplitudes for assessing the effectiveness of the heat exchange. For that purpose, a numerical simulation approach is adopted. The rectangular, triangular, trapezoidal and sinusoidal corrugated wall and artificial roughness wall shapes are investigated, in order to determine the optimal wall profile resulting in significance increase in the heat exchange process with a minimum friction loss. The numerical results are presented in the form of isotherms, streamlines, contour, Nusselt number (Nu) and friction coefficient (Cf ) using commercial software ANSYS- Fluent where the Reynolds number is in the range from 3 000 to 12 000. Our simulations reveal that the sinusoidal-corrugated channel has the highest heat transfer enhancement followed by rectangular, triangular and trapezoidal-corrugated channel. In addition, introduction of artificial roughness in the wavy channel induces stronger secondary flow which makes the flow three-dimensional and improve the heat transfer by a maximum 40% at a Reynolds number equal to 12 000. This may indicate benefits for designing heat plate compact exchangers capable of higher performances in the turbulent flow regimes. © 2019 Trans Tech Publications, Switzerland

引用

页码：189 / 199

页数：10

共 29 条

[1]

Sebbar Y.Y., Budiman A.C., Mitsudharmadi H., Development of pre-set counter-rotating streamwise vortices in wavy channel, Experimental Thermal and Fluid Science, 71, pp. 77-85, (2016)

[2]

Rush, An experimental study of flow and heat transfer in sinusoidal wavy passages, Int. J. Heat Mass Transfer., 42, pp. 1541-1553, (1999)

[3]

Metwally H.M., Manglik R.M., Enhanced heat transfer due to curvature-induced lateral vortices in laminar flows in sinusoidal corrugated-plat channel, Int. J. Heat Mass Transfer., 47, pp. 2283-2292, (2004)

[4]

Sidik N.A.C., Muhamad M.N.A.W., Japar W.M.A.A., Rasid Z.A., An overview of passive techniques for heat transfer augmentation in microchannel heat sink, Int. Commun. Heat Mass Transf., 88, pp. 74-83, (2017)

[5]

Ghani I.A., Sidik N.A.C., Kamaruzaman N., Hydrothermal performance of microchannel heat sink: The effect of channel design, Int. J. Heat Mass Transf., 107, pp. 21-44, (2017)

[6]

Ghani I.A., Kamaruzaman N., Sidik N.A.C., Heat transfer augmentation in a microchannel heat sink with sinusoidal cavities and rectangular ribs, Int. J. Heat Mass Transfer, Part B, 108, pp. 1969-1981

[7]

Ramgadia A.G., Saha A.K., Characteristics of fully developed flow and heat transfer in channels with varying wall geometry, ASME J. Heat Transfer., 136, (2014)

[8]

Akbarzadeh M., Rashidi S., Bovand M., Ellahi R., A sensitivity analysis on thermal and pumping power for the flow of nanofluid inside a wavy channel, J. Mol. Liq., 220, pp. 1-13, (2016)

[9]

Pop A.I., Convective heat transfer of micropolar fluid in a horizontal wavy channel under the local heating, Int. J. Mech. Sci., 128, pp. 541-549, (2017)

[10]

Lin L., Zhao J., Lu G., Wang X.D., Yan W.M., Heat transfer enhancement in microchannel heat sink by wavy channel with changing wavelength/ amplitude, Int. J. Therm. Sci., 118, pp. 423-434, (2017)

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