Thermodynamic model for heterogeneous bubble nucleation in a temperature gradient

Thermodynamic model for heterogeneous bubble nucleation in a temperature gradient
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温度梯度下异质气泡成核的热力学模型

DOI:
10.1063/1.3483191
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发表时间:
2010-08
影响因子:
4
通讯作者:
Yang, Zhen
Yang, Zhen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Duan, Yuan-Yuan;Wu, Di;Yang, Zhen

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建立了一个考虑壁面温度梯度影响的非均质气泡成核热力学模型。壁面温度梯度(热通量)的增加被示出抑制气泡成核或增加成核所需的温度。在临界温度梯度以上,气泡成核被完全抑制。核态沸腾的起始点与沸腾系统的qw″-Tw曲线和流体的qw,c″-Tw曲线的交点有关。理论预测与实验结果一致。
A thermodynamic model for heterogeneous bubble nucleation was developed to include the effect of the fluid temperature gradient next to a heated wall. An increase of the wall temperature gradient (heat flux) is shown to suppress bubble nucleation or increase the superheat needed for nucleation. Bubble nucleation is completely suppressed above a critical temperature gradient. The onset of nucleate boiling is shown to be related to the intersection of the qw″−Tw curve of the boiling system and the qw,c″−Tw curve of the fluid. The theoretical predictions agree with experimental results.
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