Heat transfer and flow characteristics in a rectangular channel with miniature square column in aligned and staggered arrangements

Wang, Jiansheng; Sun, Zeyu; Liu, Xueling

doi:10.1016/j.ijthermalsci.2020.106413

Cited by 8 publications

(4 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, correlations for the Nu and friction factor are constructed for practical applications based on the experimental results Jiao et al, [18]. The numerical research of the performance of heat transfer and the dynamics of flows in channels by using a miniature cubic vortex generator (MCVGs), note that the MCVGs are completely immersed inside viscous sub-layers and within the heat transfer region and the logarithmic law area.…”

Section: Introductionmentioning

confidence: 99%

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Shlash¹,

KOÇ>

2022

ARFMTS

View full text Add to dashboard Cite

One of several effective methods for improving heat transfer in heat exchangers is the use of vortex generators in channels. The flow of fluid through a channel with a vortex generator is disrupted by the development of recirculation zones on the step wall, which improves fluid mixing and heat transmission. The current work investigates the flow and heat transfer of turbulent fluid flow through channels with various vortex generator designs mathematically (triangular, half-circle, and quarter circle). The finite volume method (FVM) is used to discretize and solve the continuity, momentum, and energy equations. The SIMPLE algorithm approach is used to connect the pressure and velocity fields within the domain. The effect of geometrical factors such as step height (2, 3, 4, 5, and 6 mm) on the flow and heat fields is demonstrated and analyzed, as is the effect of Reynolds number. As the step height increases, so do the surface Nusselt number and skin friction coefficient, which peak at 4 mm. According to the findings, as Re increases, so does the average Nusselt number. The quarter circle vortex generator has the best thermal-hydraulic performance at a 4 mm amplitude height, followed by the triangle vortex generator. The simulation results are consistent with those found in the literature.

show abstract

Section: Introductionmentioning

confidence: 99%

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Shlash¹,

KOÇ>

2022

ARFMTS

View full text Add to dashboard Cite

show abstract

“…Of course, potential drag reduction effects are also possessed by other attractive micro/nanostructures, such as hemispherical [53] and square column protrusions. [54,55]…”

Section: Appearancementioning

confidence: 99%

Focus on Bioinspired Textured Surfaces toward Fluid Drag Reduction: Recent Progresses and Challenges

et al. 2021

View full text Add to dashboard Cite

After a long period of biological evolution, natural creatures will inevitably evolve body surfaces suitable for the living environment. The functions of natural biological surfaces are abundant and powerful, including antiadhesion, self‐cleaning, drag reduction, anti‐icing, wear resistance, and other characteristics. In the context of coping with the energy crisis, inspired by natural biological surface microstructures, researchers explore biomimetic surface microstructures that reduce fluid drag and investigate the mechanisms of drag reduction. Herein, mainly the current state of research on biomimetic textured surfaces that can be applied to fluid drag reduction is reviewed and the microstructures’ morphology, drag reduction mechanisms, and the fabrication techniques of textured surfaces are discussed in detail. In particular, the experimental methods for measuring the drag reduction effect of textured surfaces are introduced, which is extremely rare. The article concludes with a summary of existing problems and future directions in the research of biomimetic surface drag reduction technology. This Review can provide a reference for practical application and laboratory research of drag reduction in marine transportation, military weapons, aviation, and pipeline systems.

show abstract

“…Comparative analyses were performed between these with those of a conventional microchannel heat sink. Wang et al [15] employed a large eddy simulation to investigate the heat transfer performance and flow characteristics of a rectangular channel with three-row miniature square column vortex generators when the Reynolds number varied from 3745 to 11,235. Ling et al [16] designed a novel interlaced microchannel.…”

Section: Introductionmentioning

confidence: 99%

Thermal–Hydrodynamic Behavior and Design of a Microchannel Pin-Fin Hybrid Heat Sink

et al. 2022

View full text Add to dashboard Cite

A three-dimensional convective heat transfer model of a microchannel pin-fin hybrid heat sink was established. Considering the non-uniform heat generation of 3D stacked chips, the splitting distance of pin-fins was optimized by minimizing the maximum heat sink temperature under different heat fluxes in the hotspot, the Reynolds numbers at the entrance of the microchannel, and the proportions of the pin-fin volume. The average pressure drop and the performance evaluation criteria were considered to be the performance indexes to analyze the influence of each parameter on the flow performance and comprehensive performance, respectively. The results showed that the maximum temperature of the hybrid heat sink attained a minimum value with an increase in the splitting distance. The average pressure drop in the center passage of the microchannel first increased and then decreased. Furthermore, the optimal value could not be simultaneously obtained with the maximum temperature. Therefore, it should be comprehensively considered in the optimization design. The heat flux in the hotspot was positively correlated with the maximum heat sink temperature. However, it had no effect on the flow pressure drop. When the Reynolds number and the pin-fin diameter increased, the maximum heat sink temperature decreased and the average pressure drop of the microchannel increased. The comprehensive performance of the hybrid heat sink was not good at small Reynolds numbers, but it significantly improved as the Reynolds number gradually increased. Choosing a bigger pin-fin diameter and the corresponding optimal value of the splitting distance in a given Reynolds number would further improve the comprehensive performance of a hybrid heat sink.

show abstract

Heat transfer and flow characteristics in a rectangular channel with miniature square column in aligned and staggered arrangements

Cited by 8 publications

References 40 publications

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Turbulent Fluid Flow and Heat Transfer Enhancement Using Novel Vortex Generator

Focus on Bioinspired Textured Surfaces toward Fluid Drag Reduction: Recent Progresses and Challenges

Thermal–Hydrodynamic Behavior and Design of a Microchannel Pin-Fin Hybrid Heat Sink

Contact Info

Product

Resources

About