2015 Fiscal Year Final Research Report
Bubble motion control using a functional plate and comprehensive understanding of two-phase heat transfer mechanism through multi-scale analysis
| Project/Area Number |
25420160
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Kyoto Institute of Technology |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Keywords | 混相流 / 熱伝達 / 機能面 |
|---|
| Outline of Final Research Achievements |
In this study, the effect of the wall surface wettability on bubble motion characteristics has been investigated experimentally. The probability density distribution of bubbles near the wall increases at higher wettability, and as a result, the increase in the bubble rise velocity occurs at higher wettability. In addition, temperature measurements of natural convection gas-liquid two-phase flows have been performed using a functional plate with two types of wettability (i.e., hydrophobicity and hydrophilicity). The heat transfer coefficient with the functional plate increases by 5 %. This increase is due to the suppression of the wall-normal bubble diffusion resulting from bubble capturing at the hydrophobic region.
|
| Free Research Field |
熱流体工学
|
