Lattice Boltzmann method simulation of backward-facing step on convective heat transfer with field synergy principle

Chen, Cha’o-Kuang; Yen, Tzu-Shuang; Yang, Yue-Tzu

doi:10.1016/j.ijheatmasstransfer.2005.08.027

Cited by 24 publications

(11 citation statements)

References 23 publications

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“…Considering that the heat transfer can be related to distribution characteristics of the velocity field and temperature field, Guo et al proposed the field synergy principle of heat transfer enhancement. Verified in a series of experiments and numerical simulations [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], the principle provided a theoretical foundation for evaluating the performance of heat transfer enhancement.…”

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confidence: 99%

Application of a multi-field synergy principle in the performance evaluation of convective heat transfer enhancement in a tube

Liu

2012

Chin. Sci. Bull.

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For laminar and turbulent convective heat transfer, the synergy among vectorial physical quantities of a fluid particle is analyzed to reveal the relation between the multi-field synergy mechanism and heat transfer enhancement. Additionally, the efficiency evaluation criterion (EEC) is proposed to evaluate the overall performance of heat transfer enhancement. Meanwhile, using synergy angles , , ,  and , a unified evaluation system and corresponding evaluation indexes for heat transfer enhancement are suggested. A model of a heat-transfer-enhanced tube inserted with poles in a triangular configuration is built, and a corresponding numerical simulation is conducted to verify the proposed evaluation system and criterion. The calculation results show that there is correlation between synergy angles reflecting the direction of heat transfer enhancement and evaluation criterion reflecting the effect of heat transfer enhancement. In the Re number range of 300-1800, the performance evaluation criterion PEC lies in the range of 1.2-2.3, but the efficiency evaluation criterion EEC lies in the range of 0.33-0.45. multi-field synergy, heat-transfer-enhanced tube, laminar flow, turbulent flow, performance evaluation Citation:Liu W, Liu Z C, Ma L. Application of a multi-field synergy principle in the performance evaluation of convective heat transfer enhancement in a tube.

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confidence: 99%

Application of a multi-field synergy principle in the performance evaluation of convective heat transfer enhancement in a tube

Liu

2012

Chin. Sci. Bull.

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“…Also, the channel expansion ratio is taken as two. Figure shows Nusselt number comparison of our calculation with the result obtained from Chen et al where Re = 100 and Pr = 1.0 are taken. The comparison shows that our result and the results produced by Chen et al are in a fantastic compliance.…”

Section: Code Validationmentioning

confidence: 78%

“…To elucidate the exactitude of our developed code, the backward facing step fluid flow problem presented by Chen et al is considered. The case of forced convection with constant inlet velocity and temperature profile is solved to compute the Nusselt number.…”

Section: Code Validationmentioning

confidence: 99%

LBM simulation of forced convective channel flow containing multiple obstacles: Effects of obstacles height and position

Bala

Saha

2019

Heat Trans. Asian Res.

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We examine the effects of the obstacles, height, and position on the forced convective flow in a channel having three obstacles on the lower wall of the channel. All the walls of the channel and obstacles are retained at a constant temperature while the fluid with temperature more than the walls are entered into the channel. The flow governing equations, vorticity equation, and energy equation are solved numerically by using the lattice Boltzmann method (LBM) together with the finite difference successive over relaxation method (SOR). The effects of obstacles height, h, and distance, d, between the obstacles on the streamlines and isotherms are presented. To investigate the heat transfer rate for changing the height and position of the obstacles, local Nusselt number distribution and the mean Nusselt number distribution are also presented. It is observed that vortices, produced backward to each obstacle, increase axially with increasing the height of each obstacle. Also vortices, produced between obstacles, change its shape with decreasing the distance between obstacles. It is asserted that heat transfer rate can be increased by extending only the height of first obstacle.

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“…Some numerical computations and experiment data in refs. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] verified that the field synergy principle can be used as a guide to design heat transfer surfaces and heat exchangers.…”

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confidence: 85%

Physical quantity synergy in laminar flow field of convective heat transfer and analysis of heat transfer enhancement

Liu

Zhang

2009

Sci. Bull.

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Lattice Boltzmann method simulation of backward-facing step on convective heat transfer with field synergy principle

Cited by 24 publications

References 23 publications

Application of a multi-field synergy principle in the performance evaluation of convective heat transfer enhancement in a tube

Application of a multi-field synergy principle in the performance evaluation of convective heat transfer enhancement in a tube

LBM simulation of forced convective channel flow containing multiple obstacles: Effects of obstacles height and position

Physical quantity synergy in laminar flow field of convective heat transfer and analysis of heat transfer enhancement

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