Experimental study on near wall transport characteristics of slug flow in a vertical pipe(PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Experimental study on near wall transport characteristics of slug flow in a vertical pipe(PDF)
- 发表刊物：
- Heat and Mass Transfer
- 摘要：
- In this work, the wall shear stress and the masstransfer coefficient of the gas–liquid two-phase upwardslug flow in a vertical pipe are investigated experimentally,using limiting diffusion current probes and digital high-speed video system. In experiments, the instantaneous and averaged characteristics of wall shear stress and mass transfer coefficient are concerned. The experimental results are compared with the numerical results in previous paper of the authors. Both experiment and numerical simulation show that the superficial gas and liquid velocities have an obvious influence on the instantaneous characteristics of the two profiles. The mass transfer coefficient has charac-teristics similar to the wall shear stress. The instantaneous wall shear stress and mass transfer coefficient profiles have the periodicity of slug flow. The averaged wall shear stress and mass transfer coefficient increase with increased superficial gas velocity. However, there is inconsistency in the variation trends of the averaged wall shear stress and mass transfer coefficient with superficial liquid velocity between experimental result and numerical simulation result, which can be attributed to the difference in flow condition. Moreover, the Taylor bubble length is also another impacting factor. The experimental and numerical results all shows that the product scale can not be damaged directly by the flow movement of slug flow. In fact, the alternative forces and fluctuations with high frequency acting on the pipe wall due to slug flow is the main cause for the slug flow enhanced CO 2 corrosion process.
- 合写作者：
- K Yan, Y Zhang, D Che
- 卷号：
- 48
- 页面范围：
- 1193-1205
- 是否译文：
- 否
- 发表时间：
- 2012-01-15