Transport phenomena in the thin-film region of a micro-channel
Transport phenomena in the thin-film region of a micro-channel
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DOI：
10.1016/s0017-9310(02)00541-0
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发表时间：
2003-06
影响因子：
5.2
通讯作者：
Kyoungwoo Park;Kwanghae Noh;Kwan-Soo Lee
中科院分区：
文献类型：
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作者：
Kyoungwoo Park;Kwanghae Noh;Kwan-Soo Lee
提出了一种预测微通道薄膜区流动和换热特性的数学模型。考虑了蒸汽压的梯度和毛细管力。研究了流道高度、热流密度和固液界面滑移边界条件对热流密度的影响。薄膜区域的长度是通过比较毛细压力和分离压力的大小来计算的。随着热流密度的增加，薄膜区域的长度和厚度呈指数减小。通道高度对膜厚形状没有影响。在滑移的情况下，油膜厚度的减小会导致毛细压力和分离压力增加。
A mathematical model to predict the flow and heat transfer characteristics for a thin film region of a micro-channel is proposed. Gradient of the vapor pressure and the capillary force are considered. The effects of channel height, heat flux and slip boundary condition at the solid–liquid interface are investigated. The length of the thin film region is calculated by comparing the magnitude of the capillary and disjoining pressures. The length and the thickness of the thin film region decrease exponentially with increasing heat flux. The channel height has no effect on the shape of film thickness. In the case of slip condition, the decreased film thickness causes the capillary and disjoining pressures to increase.