The effective installation of an inclined plate for the enhancement of forced convection over rectangular sources

Wu, Hung‐Wei; Wang, S.-W.; Perng, Shiang‐Wuu

doi:10.1007/s002310050211

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…The increase in the heat transfer in this type of channel depends largely on propelling the flow toward this region and disturbing the formed thermal boundary layer as discussed [12][13][14][15][16][17][18][19][20][21]. The present study aims to apply propelling flow strategy towards the recirculation zone between the heated blocks that simulating the electronic modules using VGs.…”

Section: Heat Transfer Resultsmentioning

confidence: 99%

“…They found enhancement in the forced convective heat transfer coefficient up to 82% when cylinders were placed periodically above the back edge row of chips. Chou and Lee [15] and Wu et al [16] investigated the unsteady flow and heat transfer characteristics of rectangular sources with vortex generation from a rectangular plate on the top of a down-stream chip. The results show that the installation of an inclined plate above an upstream heat source results in a periodically unsteady flow and it can effectively enhance the heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer enhancement of a heat source located in a wake zone using rectangular vortex generators

Ali

2016

Applied Thermal Engineering

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Section: Heat Transfer Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement of a heat source located in a wake zone using rectangular vortex generators

Ali

2016

Applied Thermal Engineering

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“…In steady operating conditions of electronic components, it is reasonable to assume that each components reaches a constant temperature. So, there are many studies that assume constant surface temperature on the heated blocks simulates electronic components [27,36]. All other surfaces are adiabatic and pressure is taken as zero at the outlet of the channel.…”

Section: Geometrical Model Computational Domain and Boundary Conditionsmentioning

confidence: 99%

“…In their study, peak Nusselt number locations and causes of increased Nusselt numbers were discussed in detail by considering flow behaviors for both the smallest and larger generator-rib spacings. The paper of Wu et al [27] investigates the unsteady flow and heat transfer characteristics of rectangular sources with and without an inclined plate in a channel. Their results show that the installation of an inclined plate above an upstream source results in a periodically unsteady flow and enhances the heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

Cooling of Heated Blocks with Triangular Guide Protrusions Simulating Printed Circuit Boards

et al. 2022

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There is no study that investigates triangular guide protrusions including their systematical geometrical changes together with the effects of channel height in the open literature in the context of the authors’ knowledge. Moreover, the number of laminar studies is less than turbulent studies, whereas low velocity or natural convection cases are still important, especially for small devices in small PCB passages. The objective of this study is to investigate numerically the effects of triangular guide protrusions for the enhancement of heat transfer from the blocks’ simulated electronic components in laminar flow conditions. Two-dimensional, incompressible, steady, and laminar flow analysis was performed to predict fluid flow and heat transfer characteristics for three heated blocks in a PCB (printed circuit board) passage with triangular guide protrusions mounted on the upper wall. The Galerkin finite element method of weighted residuals was used to discretize conservation equations. The effects of the channel expansion ratio and inlet velocity were investigated for five geometrical cases. If the size of the protrusions is increased, the existence of protrusions starts to affect the flow patterns on the lower wall. The size of the last protrusion controls the flow structure downstream of the last block. On the upper wall, after the last protrusion, a recirculation is formed and the length of the recirculation increases with an increasing Re number. Moreover, the reattachment length of recirculation after the last block increases with an increasing Reynolds number for a fixed expansion ratio. Expansion ratio and inflow conditions caused by blocks and protrusions have a great influence on the formation of secondary recirculation in addition to the Reynolds number. Heat transfer increases with increasing sizes of upper triangular protrusions. Maximum overall heat transfer enhancement is provided as 47.7% with the geometry of the maximum sized protrusions for the channel height of 3 h. In the case of 4 h, the maximum overall heat transfer enhancement is 24.21%. These enhancements in heat transfer that can be encountered in PCB cooling applications may help the PCB cooling designers.

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Heat transfer: a review of 1998 literature

Goldstein¹,

Eckert

Ibele

et al. 2001

International Journal of Heat and Mass Transfer

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The effective installation of an inclined plate for the enhancement of forced convection over rectangular sources

Cited by 3 publications

References 5 publications

Heat transfer enhancement of a heat source located in a wake zone using rectangular vortex generators

Heat transfer enhancement of a heat source located in a wake zone using rectangular vortex generators

Cooling of Heated Blocks with Triangular Guide Protrusions Simulating Printed Circuit Boards

Heat transfer: a review of 1998 literature

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