Pattern Formation during Ice Crystal Growth (Ice Crystal) - 03.04.14

Overview | Description | Applications | Operations | Results | Publications | Imagery
ISS Science for Everyone

Science Objectives for Everyone The Pattern Formation during Ice Crystal Growth (Ice Crystal) investigation examines the effect of microgravity on the pattern formation of ice crystals by a method of in-situ observation. .

Science Results for Everyone

How fast do your arms grow? The dendrites, or arms, of ice crystals grown from low-super-cooled heavy water grew faster than models suggested, while those grown from high-super-cooled heavy water agreed with models. This suggests growth velocity is influenced more by face growth than tip asymmetry. Researchers also measured growth rates of crystal thickness and found that it changed suddenly with time, indicating growth rates of the two faces are not identical. This different growth rate has been suggested as a cause of distortion that leads to a hexagonal dendrite growing from a round ice crystal. Better understanding of ice crystal growth could be applied to their use in pharmaceuticals and development of new materials.



This content was provided by Yoshinori Furukawa, Ph.D., and is maintained in a database by the ISS Program Science Office.
Information provided courtesy of the Japan Aerospace and Exploration Agency (JAXA).

Experiment Details

OpNom

Principal Investigator(s)

  • Yoshinori Furukawa, Ph.D., Hokkaido University, Sapporo, Japan

  • Co-Investigator(s)/Collaborator(s)
  • Etsuro Yokoyama, Gakushuin University, Tokyo, Japan
  • Katsuo Tsukamoto, Tohoku University, Japan
  • Yukihiro Takahashi, Hokkaido University, Sapporo, Japan
  • Shigenao Maruyama, Tohoku University, Japan
  • Yukio Saito, Keio University, Japan

  • Developer(s)
    Japan Aerospace Exploration Agency (JAXA), Tsukuba, , Japan

    Sponsoring Space Agency
    Japan Aerospace Exploration Agency (JAXA)

    Sponsoring Organization
    Information Pending

    Research Benefits
    Information Pending

    ISS Expedition Duration
    October 2008 - April 2009

    Expeditions Assigned
    18

    Previous ISS Missions
    Information Pending

    ^ back to top



    Experiment Description

    Research Overview

    • Crystals that are grown on Earth are affected by gravitational forces that disturb the fluid that surrounds the growing crystal. Crystals that are grown in microgravity are able to form without the influences of gravity.


    • The Pattern Formation during Ice Crystal Growth (Ice Crystal) investigation examines the mechanisms that cause the instability in ice crystals by observing the formation as it occurs.

    Description
    In order to precisely analyze the factors concerning the pattern formation of crystal growth, an ice crystal growing freely in supercooled bulk water will be observed in-situ using an interference microscope under microgravity condition, in which the free convection in the growth chamber cannot occur. Three-dimensional patterns of ice crystals and the thermal diffusion field around the crystal will be analyzed from the experimental results.

    ^ back to top



    Applications

    Space Applications
    Information Pending

    Earth Applications
    Information Pending

    ^ back to top



    Operations

    Operational Requirements
    Information Pending

    Operational Protocols
    Information Pending

    ^ back to top



    Results/More Information
    Information Pending

    ^ back to top



    Results Publications

    ^ back to top


    Ground Based Results Publications

    ^ back to top


    ISS Patents

    ^ back to top


    Related Publications

    ^ back to top


    Related Websites
    Kibo Japanese Experiment Module
    Ice Crystals in Space - Understanding the Formation of Ice Cystals

    ^ back to top



    Imagery

    image Initial image of Ice Crystal formation on the ISS during Expedition 18. Image courtesy of JAXA.
    + View Larger Image


    image Ice Crystal formation on the ISS during Expedition 18. Image courtesy of JAXA.
    + View Larger Image


    image Ground Support team at the JAXA Control Center during Ice Crystal operations on board ISS. Image courtesy of JAXA.
    + View Larger Image