Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Bubble dynamics in nucleate pool boiling on micro-pin-finned surfaces in microgravity
- 发表刊物：
- Applied Thermal Engineering. 2014. 70(1): 172-182.
- 摘要：
- Bubble dynamics is an important phenomenon, which basically affects the nucleate boiling heat transfer
coefficient. Nucleate boiling heat transfer of gas-saturated FC-72 on micro-pin-finned surface was
experimentally investigated in microgravity environment by utilizing the drop tower facility in Beijing.
The dimensions of the silicon chips were 10 mm 10 mm 0.5 mm (length width thickness) on
which two kinds of micro-pin-fins with the dimensions of 30 30 60 mm3,50 50 120 mm3
(width thickness height, named PF30-60, PF50-120) were fabricated by the dry etching technique.
The experimental data were presented for the bubble departure radius on micro-pin-finned surface.
Experimental results showed that the bubble detachment radius increases with increasing heat flux, but
the traditional force balance model failed to predict the bubble detachment radius on micro-pin-finned
surfaces especially at high heat fluxes. Therefore, a new modified model for predicting bubble departure
radius on micro-pin-finned surface in microgravity was developed. In this model, both bubble force
balance and bubble coalescence are considered as two main factors influencing the size of bubble de-
parture radius, and the predictions agree much better with the experimental data at moderate and high
heat fluxes than the force balance model.
- 合写作者：
- Yonghai Zhang, Jinjia Wei*, Yanfang Xue, Xin Kong, Jianfu Zhao
- 卷号：
- 70(1)
- 页面范围：
- 172-182
- 是否译文：
- 否
- 发表时间：
- 2014-05-09