Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Evidence for tip velocity oscillations in dendritic solidification.

J C LaCombe1, M B Koss, J E Frei

  • 1Metallurgical and Materials Engineering, Mackay School of Mines, University of Nevada, Reno, Nevada 89436, USA. lacomj@mines.unr.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|March 23, 2002
PubMed
Summary

Space shuttle experiments revealed that pivalic acid dendrites exhibit subtle tip velocity oscillations. These oscillations correlate with the sidebranch formation process during dendritic growth.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Correlations and fluctuations in phase coarsening.

Physical review. E, Statistical, nonlinear, and soft matter physics·2006
Same author

Modeling and simulation for phase coarsening: a comparison with experiment.

Physical review. E, Statistical, nonlinear, and soft matter physics·2004
Same author

Noise of microstructural environments in late-stage phase coarsening.

Physical review. E, Statistical, nonlinear, and soft matter physics·2003
Same author

Experimental measurements of sidebranching in thermal dendrites under terrestrial-gravity and microgravity conditions.

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2002
Same author

[A rare lesion of the gastric mucosa: xanthomatosis].

Chirurgia e patologia sperimentale·1983
Same author

[The effect of antiglaucoma drugs on the depth of the anterior chamber (I)].

Bollettino della Societa italiana di biologia sperimentale·1982

Area of Science:

  • Materials Science
  • Physics
  • Space Science

Background:

  • Dendritic growth is a fundamental solidification process.
  • Understanding dendritic growth dynamics is crucial for materials science and crystal engineering.
  • Reduced-convection environments, like space, offer unique conditions to study these phenomena.

Purpose of the Study:

  • To investigate the dynamics of isothermal dendritic growth in a microgravity environment.
  • To analyze the axial growth velocity of dendrites using spectral analysis.
  • To identify any oscillatory behavior and its relation to sidebranch formation.

Main Methods:

  • Experiments conducted aboard the space shuttle Columbia (STS-87) in a reduced-convection environment.
  • Observation of pivalic acid dendrite growth using high-speed video (30 frames/s).

Related Experiment Videos

  • Spectral analysis applied to video data to study growth velocity fluctuations.

    • Main Results:

    • Pivalic acid dendrites displayed a subtle oscillatory behavior in their axial growth velocity near the tip.
    • A specific frequency component was identified within these oscillations.
    • This frequency component was found to be associated with the sidebranch formation process.

    Conclusions:

    • Dendritic tip growth is not always steady and can exhibit oscillatory dynamics.
    • Sidebranch formation in pivalic acid dendrites is linked to tip velocity oscillations.
    • Microgravity experiments provide valuable insights into fundamental solidification processes.