Development of heat and mass transfer model for condensation
Development of heat and mass transfer model for condensation
复制标题
冷凝传热传质模型的开发
DOI：
10.1016/j.icheatnasstransfer.2017.03.009
复制
发表时间：
2017-05
影响因子：
7
通讯作者：
Jin Tao
中科院分区：
文献类型：
--
作者：
Shen Qie;Sun Daming;Su Shiyue;Zhang Ning;Jin Tao
发散和界面温度偏差是Lee模型模拟冷凝过程的两个主要问题。基于汽-液界面的传热分析，揭示了描述界面温度偏差与模型参数的关系的关联式，qi_（Tsat-Ti）（Akv）0.5其中A =hfgrρv/Tsat。有了这种相关性，凝结频率的确定就不再是经验性的了。此外，关联式表明，蒸汽的导热系数起着重要的作用。据此，提出了一种改进的模型，该模型放大了相相互作用区的蒸汽导热系数。用Nusselt问题对该模型进行了验证，讨论了模型参数的影响，并与原Lee模型进行了比较。结果表明，蒸汽的热导率被放大，从而减小了界面温度偏差。通过同步增加Aandkv来维持收敛。并对R134 a的强制对流冷凝进行了验证。关联式预测的温度偏差为0.1K，数值计算结果成功地达到0.12K。
Divergence and the interfacial temperature deviation are the two main problems in condensation simulation with the Lee model. Based on the heat transfer analysis at the vapor-liquid interface, a correlation is revealed describing the relationship between interfacial temperature deviation and the model parameters,qi≈ (Tsat−Ti)(Akv)0.5whereA=hfgrρv/Tsat. With this correlation, the determination of the condensation frequencyris no longer empirical. Furthermore, the correlation indicates that the thermal conductivity of vapor plays an important role. Accordingly, an improved model is proposed amplifying the thermal conductivity of vapor in the phase interaction region. The model is verified with the Nusselt problem and the impacts of the model parameters are discussed and compared with the original Lee model. It is shown that the interfacial temperature deviation is reduced by the amplified thermal conductivity of vapor. The convergence is maintained by increasing bothAandkvsynchronously. Verification is also obtained on the forced convection condensation of R134a. The correlation predicts a temperature deviation at 0.1 K and the numerical result successfully reaches 0.12 K.
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影响因子：
--
作者：
E. D. Riva;D. Col
通讯作者：
E. D. Riva;D. Col
DOI：
10.1021/j150658a046
发表时间：
1984-07
期刊：
The Journal of Physical Chemistry
影响因子：
--
作者：
G. Rubel;J. Gentry
通讯作者：
G. Rubel;J. Gentry
影响因子：
--
作者：
Yuwen Zhang;A. Faghri;M. Shafii
通讯作者：
Yuwen Zhang;A. Faghri;M. Shafii
DOI：
10.1142/9789814460286_0004
发表时间：
2002
期刊：
--
影响因子：
--
作者：
W. Lee
通讯作者：
W. Lee
DOI：
10.1016/j.cep.2013.12.004
发表时间：
2014-02
期刊：
Chemical Engineering and Processing
影响因子：
--
作者：
Sihan Chen;Zhen Yang;Y. Duan;Ying Chen;Di Wu
通讯作者：
Sihan Chen;Zhen Yang;Y. Duan;Ying Chen;Di Wu