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非均匀内热源对多孔介质中传热传质的影响

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摘要 采用数值方法分析了填充多孔介质的竖直同心套管内,非均匀分布的内热源和内外壁面温差对自然对流的影响。考察了内热源分布系数M、浮力比N对流场、温度场和内外壁面Nusselt数和Sherwood数的影响。结果表明:M增大流场中部形成逆向环流向壁面扩充;温度场中内、外壁面处等温线分布加密;套管近轴线处流体浓度与等间距水平线偏差增大。内壁面Nusselt数和上壁面Sherwood数变化范围增大,表明内热源分布梯度增大有助于传热、传质。
出处 《四川化工》 CAS 2006年第1期1-3,6,共4页 Sichuan Chemical Industry
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