2012 Fiscal Year Final Research Report
Measurements of Turbulence Kinetic Energy Budget in Turbulent Bubbly Flows using Photobleaching Molecular Tagging Method
| Project/Area Number |
22560167
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Kobe University |
|---|
Principal Investigator |
HOSOKAWA Shigeo 神戸大学, 大学院・工学研究科, 准教授 (10252793)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TOMIYAMA Akio 神戸大学, 大学院・工学研究科, 教授 (30211402)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | 乱流 / 分子タグ法 / 気泡流 |
|---|
| Research Abstract |
Understanding turbulence kinetic energy (TKE) budget in gas-liquid two-phase bubbly flows is indispensable to develop and improve turbulence models for the bubbly flows. Simultaneous measurement of velocity and velocitygradients with a spatial resolution smaller than the Kolmogorov scale is required to evaluate the TKE budget experimentally. We therefore improved a molecular tagging velocimetry based on photobleaching reaction (PB-MTV) to accurately evaluate TKE budget. We measured TKE budget in a turbulent water flow and bubbly flows in a square duct by using the PB-MTV to examine effects of bubbles on TKE budget. The experimental results will contribute to improve a numerical simulation method for turbulent bubbly flows.
|
