Experimental study of the turbulent flow around a single wall-mounted cube exposed to a cross-flow and an impinging jet

Masip, Yunesky; Rivas, Alejandro; Larraona, Gorka S.; Antón, Raúl; Ramos, Juan Carlos; Moshfegh, Bahram

doi:10.1016/j.ijheatfluidflow.2012.07.004

Cited by 32 publications

(27 citation statements)

References 36 publications

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“…To validate our digital work, we tested three different meshes (Table 1), and finally selected only the mesh comprising 552888 elements and 532720 nodes for each case studied as being the optimal mesh. We validated our simulations results with the experimental work of Massip et al [24], who validated his results with those of Meinders [30]. The velocity profiles obtained numerically using the SST model for four different positions as shown in Figure 12.…”

Section: Boundary Conditionssupporting

confidence: 71%

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Impact of Geometry of Electronic Components on Cooling Improvement

Meghdir¹,

Benabdallah²,

Dellil³

2019

IJHT

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In this paper we have numerically treated the thermal and dynamic aspect of different prismatic bodies simulating electronic components, heated and mounted on the lower wall of a channel. These components are cooled by forced convection using a turbulent flow flowing along the channel and an impinging jet flowing from the upper wall perpendicularly to them. The fluid used is air of which we vary the Reynolds number in order to see its impact on the component cooling. We opted for four different geometries of the prismatic body taken in the same working conditions. We compared the results obtained to propose one of the geometries which will permit a better evacuation of the heat, thus a good cooling of the component. By combining an unstructured mesh with the finite volume method, the solution is obtained by using the SIMPLE algorithm (pressure-velocity coupling). Turbulence is modeled using the so-called Shear Stress Transport (SST) model to evaluate the heat exchange in these configurations. This numerical study is carried out with the code ANSYS.CFX 14 to evaluate the thermal exchanges.

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Section: Boundary Conditionssupporting

confidence: 71%

“…Masip et al [24], experimentally studied the influence of the Reynolds numbers of the impinging jet (Rej) and that of the channel air flow (ReH), on the flow structure. Three Reynolds numbers of the channel flow were used (3410, 5752, 8880), while taking the ratio Rej/ReH equal to 0.5, 1.0, 1.5, respectively.…”

Section: Introductionmentioning

confidence: 99%

Impact of Geometry of Electronic Components on Cooling Improvement

Meghdir¹,

Benabdallah²,

Dellil³

2019

IJHT

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“…Figure 5 shows the contours of the magnitude velocities and the streamlines one on the other for different values of R with Re j = 6593. These figures show the behavior of the fluid flow in a rectangular channel; the same structure was obtained from References [8,10,17]. First, we noticed a point of stagnation generated on the upper face of the cube due to the striking jet.…”

Section: Validationsupporting

confidence: 67%

Three‐dimensional turbulent forced convection around a hot cubic block exposed to a cross‐flow and an impinging jet

Boudraa

Bessaïh

2020

Heat Trans

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A numerical study of a three-dimensional, turbulent, forced convection flow around a hot cubic block exposed to cross-flow and an impinging jet is carried out. The standard k-ε turbulence model is used to study the effects of Reynolds number ratio on the flow and heat transfer. For each value of the Reynolds number of the jet, the Reynolds number ratio is equal to 1, 1.5, and 2. The influence of the channel height and the jet axis location are also examined. The governing equations are solved by using Ansys Fluent software 14.5. Results show that the heat transfer increases with the increase in the Reynolds number ratio. At the top of the cube, better cooling occurs with an increase in the speed of the impinging jet. A reduction in the height of the channel and the displacement of the axis of the jet toward the channel inlet improve the heat transfer. Our simulations are compared with experimental data found in the literature, using different turbulence models.

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“…9(a)). In addition to ventilation provision, impinging jets offer high rates of heat/mass transfer and have been used in a wide variety of industrial applications (Hollworth and Durbin, 1992; Rundström and Moshfegh, 2008;Masip et al, 2012;Larraona et al, 2013). Impinging jets are also of scientific interest due to the presence of different flow regimes in the jet flow.…”

Section: Impinge Jet Ventilation (Ijv)/confluent Jets Ventilation (Cjv)mentioning

confidence: 99%

A review of advanced air distribution methods - theory, practice, limitations and solutions

Yang

Melikov

Kabanshi

et al. 2019

Energy and Buildings

184

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Ventilation and air distribution methods are important for indoor thermal environments and air quality. Effective distribution of airflow for indoor built environments with the aim of simultaneously offsetting thermal and ventilation loads in an energy efficient manner has been the research focus in the past several decades. Based on airflow characteristics, ventilation methods can be categorized as fully mixed or non-uniform. Non-uniform methods can be further divided into piston, stratified and task zone ventilation. In this paper, the theory, performance, practical applications, limitations and solutions pertaining to ventilation and air distribution methods are critically reviewed. Since many ventilation methods are buoyancy driving that confines their use for heating mode, some methods suitable for heating are discussed. Furthermore, measuring and evaluating methods for ventilation and air distribution are also discussed to give a comprehensive framework of the review.

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Experimental study of the turbulent flow around a single wall-mounted cube exposed to a cross-flow and an impinging jet

Cited by 32 publications

References 36 publications

Impact of Geometry of Electronic Components on Cooling Improvement

Impact of Geometry of Electronic Components on Cooling Improvement

Three‐dimensional turbulent forced convection around a hot cubic block exposed to a cross‐flow and an impinging jet

A review of advanced air distribution methods - theory, practice, limitations and solutions

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