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首页> 外文期刊>Journal of Heat Transfer >Pore-Scale Simulation on Pool Boiling Heat Transfer and Bubble Dynamics in Open-Cell Metal Foam by Lattice Boltzmann Method
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Pore-Scale Simulation on Pool Boiling Heat Transfer and Bubble Dynamics in Open-Cell Metal Foam by Lattice Boltzmann Method

机译：用格子Boltzmann方法对池沸腾热传递和泡沫动力学的孔径仿真

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摘要

Based on the newly developed geometrical model of open-cell metal foam, pool boiling heat transfer in open-cell metal foam, considering thermal responses of foam skeletons, is investigated by the phase-change lattice Boltzmann method (LBM). Pool boiling patterns are obtained at different heat fluxes. The effects of pore density and foam thickness on bubble dynamics and pool boiling heat transfer are revealed. The results show that "bubble entrainment" promotes fluid mixing and bubble sliding inside metal foam. Based on force analysis, the sliding bubble is pinned on the heating surface and cannot lift off completely at high heat flux due to the increasing surface tension force. Pool boiling heat transfer coefficient decreases with increasing pore density and foam thickness due to high bubble escaping resistance.
机译：基于新开发的开发的开放式电池金属泡沫模型，考虑到泡沫骨架热响应的开放式电池金属泡沫中的池沸腾热传递，通过相变格螺栓玻璃法（LBM）研究了泡沫骨架的热反应。在不同的热通量下获得池沸腾图案。揭示了孔密度和泡沫厚度对泡沫动力学和池沸腾热传递的影响。结果表明，“泡沫夹带”促进了金属泡沫内部的流体混合和泡沫。基于力分析，滑泡气泡在加热表面上固定，并且由于表面张力增加，不能在高热通量下完全抬起。由于高气泡逸出阻力，池沸腾传热系数随着孔密度和泡沫厚度而降低。

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