Looking through inside of the Guinness cascades by using Near Infrared Ray Camera

1. Looking through
inside of the Guinness cascades
by using
Near Infrared Ray Cam
Jun Hirabayashi
jun@hirax.net http://www.hirax.net
Twitter:@hirax

2. This is me!
▪ Hobby-­‐Scientist as my Life work
– Daily log : http://www.hirax.net
– Field of the my works;
▪ Science behind our daily life
▪ Science for Adults
▪ To Explore various invisible world
▪ Imaging-­‐science for Money
– If you have any small problem and much plenty of money, then you’d better to call me!

3. Guinness Beer cascades invites us into here!
▪ The phenomena fascinates all of us.
▪ Actually, I always drink Guinness beer when I’ve been studying OpenFOAM
with our small study group (The leader: Masami Kadonaga)

4. Let’s learn “Electromagnetic spectrum”
▪ Wavelength around one micro meters, and frequency 30 Tera Hertz

5. My Nude Picture taken with NIR Camera
▪ We can see very different world from normal visible light world!

6. Near Infrared Ray Images
▪ We can see very different world from normal visible light world!

7. How drink materials look like with NIR-­‐eyes?
▪ Many dark/black drinks change their looks!
(into “Transparent”)

8. Ok. We can see inside the Guinness Cascades!
▪ I shot Guinness Cascades every Sunday morning!
(using NIR camera and sun light)

9. When sun rise, we can do it!
▪ koew

10. Ok. We can see inside the Guinness Cascades!
▪ I shot Guinness Cascades every Sunday morning!
(using NIR camera and sun light)

11. ▪ これ

12. PIV (Particle Image Velocimetry)
▪ To estimate velocity distribution of nitrogen bubble motion by using
Particle Image Velocimetry (PIV)
▪ “Velocity of image patterns”
▪ With ImageJ PIV plugin
×mmくらい

13. PIV (Particle Image Velocimetry) result
Vertical velocity
(White:Up)
Horizontal velocity
(White:Going outside)
Field of view
(Yellow rectangle)

14. What I did, today
Real Situation Measurement
Simulation
Understandings
Modification

15. Future works
▪ Stereo PIV would be interesting to construct 3D result
▪ 3D VR flow viewing with HMD devices
▪ Estimation / separation bubble mouton and liquid motion