2017 Fiscal Year Final Research Report
Three-dimensional vortical structures and Lagrange velocity measurements
| Project/Area Number |
16K14158
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Fluid engineering
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Keywords | 乱流 / 超流動 / 可視化 |
|---|
| Outline of Final Research Achievements |
The three-dimensional visualization system was constructed with 4 high-speed cameras. And the Lagrange trajectories are recorded in a short period of time. The camera system, small luminescence particles, laser system, and optical systems were improved. This visualization system enables us to obtain the velocity filed in space and the small eddy structures are visualized by means of 2nd invariant of velocity gradient tensor. For applying to the visualization of quantum eddy, each camera is connected with one another by ran cables and is synchronized by trigger input signal. Small particle trajectories are recorded at 4 different times. Lagrange velocity and acceleration were calculated and their probability density functions are analyzed in the counter flow. Changing the heater power, the counter flow pattern varies, and their statistical properties are studied.
|
| Free Research Field |
流体工学
|
