Purpose

The purpose of this study is to promote laminar heat transfer from the channel heated through a slab with slits and inclined ribs protruding across.

Design/methodology/approach

The novel design of this study is performed through making the slits in the slab (C1–C3: with slits; C4–C6: without slits) and changing the vertical location of this slab (1/4, 1/2 and 3/4 channel height). The thermal fluid characteristics of all cases are analyzed for various Reynolds numbers (500, 1,000, 1,500 and 2,000) by the SIMPLE-C algorithm.

Findings

The results display that the ribbed slab effectively improves the heat transfer. The slits can modify the flow field in the vortexes around the inclined ribs and remove more heat from this zone to promote the heat transfer. As compared with C0 (without a slab), C2 (the slab with slits and inclined ribs protruding across located vertically on the 3/4 channel height) raises the averaged Nusselt number up to 27.7% at Re = 2,000. As compared with C4 (without slits), C1 (with slits) gains the maximum increase in the averaged Nusselt number by 5.07% at Re = 1,000.

Research limitations/implications

The constant thermo-physical properties of incompressible fluid and the steady flow are considered in this study.

Practical implications

The numerical results will profit the design of heated passageway using a slab with slits and inclined ribs protruding across to acquire better heat transfer promotion.

Originality/value

This slab with slits and inclined ribs protruding across can be applied to the heat transfer promotion and thus be viewed as a useful cooling mechanism in the thermal engineering.

中文翻译：

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采用具有狭缝和斜肋突出的板条在通道层流中的传热促进

目的

这项研究的目的是促进层流传热从通道加热，通过带有狭缝和斜肋突出的板坯。

设计/方法/方法

本研究的新颖设计是通过在平板上制作狭缝（C1-C3：有狭缝；C4-C6：无狭缝）并改变该平板的垂直位置（1/4、1/2 和 3/4通道高度）。通过 SIMPLE-C 算法分析各种雷诺数（500、1,000、1,500 和 2,000）的所有情况的热流体特性。

发现

结果表明，带肋板有效地改善了传热。狭缝可以改变倾斜肋周围涡流中的流场，并从该区域带走更多热量以促进热传递。与 C0（无板）相比，C2（在 3/4 通道高度上垂直突出的带有狭缝和斜肋的板）在 Re = 2,000 时将平均努塞尔数提高了 27.7%。与 C4（无狭缝）相比，C1（有狭缝）在 Re = 1,000 时平均努塞尔数增加了 5.07%。

研究限制/影响

本研究考虑了不可压缩流体的恒定热物理性质和稳定流动。

实际影响

数值结果将有益于使用带有狭缝和斜肋突出的板的加热通道设计，以获得更好的传热促进。

原创性/价值

这种带有狭缝和斜肋突出的板坯可用于传热促进，因此被视为热工程中有用的冷却机制。