NASA - National Aeronautics and Space Administration

Overview | Description | Applications | Operations | Results | Publications | Images

Experiment/Payload Overview

Information provided courtesy of the Japan Aerospace and Exploration Agency (JAXA) Brief Summary

Chaos, Turbulence and its Transition Process in Marangoni Convection (Marangoni) is a surface- tension-driven flow experiment. A liquid bridge of silicone oil (5 or 10 cSt) is formed into a pair of disks. Convection is induced by imposing the temperature difference between disks. We observe the flow and temperature fields in each stages and investigate the transition conditions and processes precisely.

Principal Investigator

Hiroshi Kawamura, Ph.D., Faculty of Science and Technology, Tokyo University of Science, Chiba, Japan

Co-Investigator(s)/Collaborator(s)

Satoshi Matsumoto, Ph.D., Japan Aerospace Exploration Agency, Tsukuba, Japan

Payload Developer

Japan Aerospace Exploration Agency, Tsukuba, Japan

Sponsoring Agency

Japan Aerospace Exploration Agency (JAXA)

Expeditions Assigned

|17|18|19|20|21|22|

Previous ISS Missions

Increment 17 was the first mission for Marangoni.?

^ back to top

---

Experiment/Payload Description

Research Summary

• Marangoni EXP and UVP are two Fluid Physics experiments to observe Marangoni convection which is a surface-tension-driven flow.



• A liquid bridge of silicone oil with 30mm or 50mm in diameter is formed into a pair of disks. Convection is induced by imposing the temperature difference between disks because of the surface tension gradient.



• Due to the fluid instability, flow transits from steady to oscillatory, chaos, and turbulence flows one by one as the driving force increases.



• We observe the flow and temperature fields in each stages and investigate the transition conditions and processes precisely.

Description

Marangoni convection is a surface-tension-driven flow. A liquid bridge of silicone oil (5 or 10 cSt) is formed into a pair of disks. Convection is induced by imposing the temperature difference between disks. Due to the fluid instability, Flow transits from laminar to oscillatory, chaos, and turbulence flows one by ones as the driving force increases. We observe the flow and temperature fields in each stages and investigate the transition conditions and processes precisely.

^ back to top

---

Applications

Space Applications

Information Pending

Earth Applications

This experiment directly contributes to high quality crystal growth such as oxide materials for optical application. The outcomes will utilize the advance micro-fluid technology (eg. Pico-liter droplet formation for Drug discovery and Analytical chemistry, Coalescence of liquid droplets for micro-bearing). The results will provide the knowledge to High performance Heat Pipe with use of Marangoni convection for cooling personal computer devices and energy transport with a higher efficiency in future human space activities.

^ back to top

---

Operations

Operational Requirements

Information Pending

Operational Protocols

Information Pending

^ back to top

---

Results/More Information

Information Pending

^ back to top

---

Related Web Sites

The information on this web page was duplicated from the JAXA Experiment Database. The "Brief Research Summary (PAO)" and "Research Summary" are provided by the Office of the ISS Program Scientist.

Fluid Science Under Microgravity

^ back to top

---

Publications

Results Publications

^ back to top

---

Related Publications

^ back to top

---

Images

Nasa _image: ISS018E012248 Sandra Magnus works with the Marangoni experiment mounted to a Maintenance work area (MWS) on Expedition 18.
+ View Larger Image


NASA Image: ISS020E048792 - Canadian Space Agency astronaut Robert Thirsk, Expedition 20/21 flight engineer, holds Fluid Physics Experiment Facility/Marangoni Surface (FPEF MS) Core hardware in the Kibo laboratory of the International Space Station.
+ View Larger Image


Information Provided and Updated by the ISS Program Scientist's Office