Numerical Heat Transfer in a Rectangular Channel with Mounted Obstacle

Gareh, Salim

doi:10.18052/www.scipress.com/ilcpa.38.111

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…They reported that the individual rectangular modules caused a larger enhancement in the heat transfer inside the channel in comparison to the square modules. The results of other studies have provided evidence that, as the space between obstacles is decreased, the fluid flow in the channel is consequently enhanced, and that an increase in the Reynolds number (Re) enhances the process of heat removal around the obstacles, chiefly around the obstacle corners [2][3][4]. In a numerical study, Mohamed Toumi et al [5] investigated the three-dimensional shearing flows of Newtonian fluids around a cuboid obstacle.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement inside channel by using the Lattice Boltzmann Method

et al. 2021

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In this study, the Lattice Boltzmann Method (LBM) is employed in order to examine the fluid flow and forced convection heat transfer inside a twodimensional horizontal channel with and without obstacles. In order to enhance the heat and thermal energy transfer within the channel, different obstacle arrangements are posed to the flow field and heat transfer with the purpose of studying their sensitivity to these changes. The results indicate that, when the value of the Reynolds number is maximum, the maximum average Nusselt numbers happens on the lower wall (Case 4). The paper extends the topic to the use of nanofluids to introduce a possibility to enhancement of the heat transfer in the channel with an array of the obstacles with forced convection. For this purpose, the AgMgO/water micropolar hybrid nanofluid is used, and the volume fraction of the nanoparticle (50% Ag and 50% MgO by volume) is set between 0 and 0.02. The results showed that, when the hybrid nanofluid is used instead of a typical nanofluid, the rate of the heat transfer inside the channel increases, especially for the high values of the Reynolds number, and the volume fraction of the nanoparticles. Increasing the volume fraction of the nanoparticles increase the local Nusselt number (1.17-fold). It is shown that the type of obstacle arrangement and the specific nanofluid can exerts significant effects on the characteristics of the flow field and heat transfer in the channel. This study provides a platform for using the LBM to examine fluid flow through discrete obstacles in offset positions.

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Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement inside channel by using the Lattice Boltzmann Method

et al. 2021

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“…Parndtl number affects the precise location of the periodically fully developed region. Gareh [11] carried out numerical investigation of heat transfer in a rectangular channel with mounted obstacle. He showed that as the value of the Reynolds number increases, the heat removed from the obstacles increases sensibly with a maximum heat removal around the obstacle corners.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of flow and heat transfer in a channel with different configurations and alternately order obstacles

Lafta

2019

University of Thi-Qar Journal

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In the present study, a numerical investigation has been made to predict the laminar flow and heat transfer through a rectangular channel with adiabatic, different configuration obstacles which are arranged alternately on the upper and lower walls of the channel. These walls are subjected to a constant heat flux 500 W/m 2 . The effect of obstacles number, and obstacles shape on the flow and heat transfer characteristics with different Reynolds number (100,200,300,400,500,600and 700) have been studied. The continuity, momentum, and energy governing equations are solved by the finite volume method. The results of this study reveal that the obstacles have an obvious effect on parameters of the flow and heat transfer enhancement. The heat transfer is improved more as the obstacle's number increase. Further that, using rectangular obstacle leads to increase heat transfer rate higher than the rest of shapes for all Reynolds number tested.

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