Experimental and numerical study of air-water flow characteristics in a horizontal duct
| Autor: | Ali Zahran, Mohamed H. Mansour, Ibrahim M. Shabaka, Lotfy Rabie |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy Mechanical Engineering 02 engineering and technology Mechanics Flow pattern 01 natural sciences 010305 fluids & plasmas Mass transfer 0103 physical sciences Bubble velocity 0202 electrical engineering electronic engineering information engineering Air water Duct (flow) Two-phase flow |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 235:843-858 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1177/0954406220936312 |
| Popis: | The horizontal bubbly two-phase flow is preferably used in various industrial applications because it provides high interfacial areas which enhance the heat and mass transfer. In the present research, the phase distribution of controlled air-water flow in a horizontal acrylic round pipe with 60 mm inside diameter (D) has been investigated experimentally and modeled numerically. The modeled differential pressure and the mixture velocity profile at a distance of 33D from the mixing section (fully developed region) are computed numerically and compared with those obtained experimentally from the two-phase flow system established and maintained at the National Institute of Standards (NIS-Egypt). Furthermore, the numerical and the experimental data have been compared with previous correlations and models. Reasonable quantitative agreement between all data is found. An electronic device based on Arduino Uno board was designed and used with careful data manipulation for measuring the slug bubble velocity. The results point out that the air volume fraction has a maximum value at the upper pipe wall as the gas bubbles tend to migrate to the upper wall. A new correlation was obtained for bubble migration length to the upper pipe wall which is very important in chemical industrial processes and other engineering application. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|