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Newsletter Nagare2025.3.31 Update
― Theme :"The Conference of Fluid Engineering Division" (Part 2) " ―
- Preface
Hyun Jin PARK, Shoichi MATSUDA, Chungpyo HONG - Simultaneous multi-point measurement for thickness distribution of rivulet-like liquid film flow using fiber-optic probes
Kosuke NAKANO, Yuki MIZUSHIMA (Shizuoka University) - Lagrangian statistics in turbulent flows of viscoelastic fluids
Yusuke KOIDE (Nagoya University), Susumu GOTO (Osaka University) - Fabrication of Cellulose/Silver Composite Filament by Nozzle Flow with Applied Electric Field
Wakana HIRA, Yutaka KANEKO, Hidemasa TAKANA (Tohoku University) - Effects of Airfoil Surface Orientation on the Output Characteristics of a V-Type Vertical Axis Wind Turbine with NACA0018-Based Blades
Sho OOI, Moch Fakhrul FAUZI, Takanori BABASAKI, Ryo SAKURAI, Takaaki KONO, Takahiro KIWATA, Nobuyoshi KOMATSU (Kanazawa University) - Motion and drag reduction effect of bubbles in a turbulent boundary layer developed beneath a moving wall
Itsuki MORI, Yasufumi HORIMOTO, Hyun Jin PARK, Yuji TASAKA, Yuichi MURAI (Hokkaido University)
― Theme : "The Conference of Fluid Engineering Division (Part 1)" ―
- Preface
Hyun Jin PARK, Shoichi MATSUDA, Chungpyo HONG - Present to Future of Rocket Propulsion -JAXA Kakuda Space Center Initiatives-
Takeo TOMITA (JAXA) - The 21st Dream contest of the flow Moment of healing
Shoma HIJIKATA (Meisei University) - Thinking about the SDGs from another point of view
Yui YAMADA, Taichi WATANABE and Haruto KAWATA (Nihon University) - Report of The Dream of Flow Contest
Masashi KAMBE and Taro MATSUSHIMA (Kanazawa University)
Enjoy Fluid Experiments Lab.2026.2.16 Update
| Surface tension, inertia | Why does the Water Dome Grow Larger? |  |
Touching a water dome formed on a bottle cap with your finger causes it to grow. Why does this happen? |
| Surface tension, inertia | Is It due to a Pressure Difference? |  |
Could the increased size of the water dome be explained by pressure changes inside the dome? |
| Coandă effect | Is this due to the Coandă Effect? (Part 1) |  |
Does the Coandă effect explain the dome’s growth when touched? |
| Coandă effect | Is this due to the Coandă Effect? (Part 2) |  |
Does the Coandă effect explain the dome’s growth when touched? |
| Surface tension, inertia | What Causes the Water Dome to Grow? |  |
A summary of the most likely explanation for the dome’s behavior. |
| Surface tension, inertia | Dishwashing detergent Makes the Dome Larger |  |
Adding dishwashing detergent can increase the size of the water dome. |
| Surface tension, inertia | Miniature Dome |  |
A simple toy demonstrating how a small water dome can be made. |
| Surface tension, inertia | Water Dome Shaped Like an Umbrella |  |
A water dome that resembles an opening umbrella. |
| Depth and pressure, negative pressure | A Balloon that Inflates when Lifted |  |
Lifting a plastic bottle causes the balloon inside to inflate. |
| Depth and pressure, negative pressure | A Plastic Bottle that Draws up Water |  |
When lifted, the plastic bottle draws water upward. |
| Depth and pressure, buoyancy, Cartesian diver, negative pressure | A Cartesian Diver that Floats when the Bottle Is Lifted |  |
The Cartesian diver inside rises on lifting the plastic bottle. |
| Flow around objects, Coandă effect | Lifting a Balloon with a Circulator |  |
Try making a balloon float using a circulator fan. |
| Flow around objects, Coandă effect | Lifting Three Tied Balloons |  |
Tie three balloons together with string and make them float. |
| Flow around objects, momentum theory | Rotating Two Balloons |  |
Attach tails to two balloons and observe their spinning motion while floating. |
| Flow around objects, Coandă effect | When Two Styrofoam Balls Float |  |
What happens when two Styrofoam balls are released into an airstream? |
| Flow around objects, Coandă effect | Yakiniku |  |
Yakiniku without fire? |
| Refraction of light | Mysterious Bowl |  |
A hidden medal appears on pouring water into the bowl. |
| Refraction of light, siphon principle | The Gold Medal Appears and Disappears |  |
Pour water into the cup to reveal a gold medal, then pour more to make it vanish. |
| Depth and pressure | Container and Lid 1 (Something Happens with a Countdown) |  |
Cover the can with a plastic plate, submerge it in water, and when the countdown ends... |
| Depth and pressure | Container and Lid 2 (Container with a Hole) |  |
When you submerge the can in water with the plastic plate at the bottom... |
| Depth and pressure | Container and Lid 3 (Lid is Heavier than Water) |  |
Submerge a can covered with a hole-punched plastic plate... |
| Depth and pressure | Container and Lid 4 (Lid is Lighter than Water) |  |
Cover a can with a hole-punched Styrofoam lid and submerge it in water... |
| Refraction and reflection of light, total reflection | Principle of Optical Fiber |  |
When light is shone on the water surface from below, it may reflect entirely. |
| total reflection | Water as Optical Fiber |  |
Water flows from a hole in a plastic bottle— if you shine a light through it... |
| total reflection | Observing Static Electricity using Light |  |
Use light and flowing water to visualize the effects of static electricity. |
| total reflection | Observing a Shower using Light |  |
Create a simple shower and observe how light travels through the water stream. |
| Buoyancy | Which is Heavier, Water or Stone? (What is Density?) |  |
The stone sinks in water—but is it really because it's heavier? |
| Buoyancy | Is the Gold Medal Genuine? |  |
Are the gold, silver, and bronze medals I bought actually authentic? |
| Buoyancy | Floating Stainless Steel Ball |  |
A stainless steel ball that floats—how is that possible? |
| Buoyancy | Rock Density |  |
Measure and compare the densities of different types of rock. |
| Buoyancy | Measuring Volume 1 (Archimedes' Principle) |  |
Use the buoyancy principle to measure the volume of an object. |
| Buoyancy | Measuring Volume 2 (Things that Float on Water) |  |
Use the buoyancy principle to measure the volume of an object. |
| Buoyancy | Volume of an Inflated Balloon |  |
Measure the volume of a balloon inflated underwater. |
| Buoyancy | Volume of Bubbles |  |
Determine the volume of air bubbles released in water. |
| Buoyancy | Measure Bottle Volume |  |
Measure the internal volume of a bottle. |
| Jet propulsion, law of momentum | Balloon Car 1 (Mechanism) |  |
Propel a car by releasing air from a balloon. |
| Jet propulsion, law of momentum | Balloon Car 2 (Nozzle Size) |  |
How does changing the nozzle size affect the car's speed and distance? |
| Jet propulsion, potential energy | Water-powered Car 1 (High Water Level) |  |
Use water at a high level in the tank to power a model car. |
| Jet propulsion, potential energy | Water-powered Car 2 (Low Water Level) |  |
What happens to the car's performance when the water tank is positioned lower? |
The hot topic on study, technological development and R&D in fluids engineering fields2024.9.5 Update
| Performance prediction model of contra-rotating axial flow pump with separate rotational speed of front and rear rotors and its application for energy saving operation De ZHANG（Torishima Pump Mfg. Co., Ltd.）， |
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| Mechanism of aerodynamic force generation concerning train vibration in tunnel (LES of large-scale flow structure around simplified train model) Koji NAKADE（Railway Technical Research Institute）， Yutaka SAKUMA（Railway Technical Research Institute, currently Tokushima Bunri University）， Takeo KAJISHIMA（Osaka University, currently Shikoku Polytechnic College） |
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Let's explore lab! (Introduction of laboratories)2022.10.17 Update
The New Carbon-neutral Fuel Engineering Laboratory! （Yamaguchi University）
Ryoya Shiraishi, Associate professor Carbon-neutral Fuel Engineering Laboratory, |
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