Evidence for tip velocity oscillations in dendritic solidification

J. C. LaCombe; M. B. Koss; J. E. Frei; C. Giummarra; A. O. Lupulescu; M. E. Glicksman

doi:10.1103/PhysRevE.65.031604

Evidence for tip velocity oscillations in dendritic solidification

J. C. LaCombe, M. B. Koss, J. E. Frei, C. Giummarra, A. O. Lupulescu, and M. E. Glicksman

Phys. Rev. E 65, 031604 – Published 15 February 2002

Abstract

Dendritic growth experiments were conducted in the reduced-convection environment aboard the space shuttle Columbia on STS-87. Spectral analysis was performed on 30-frame/s video data during growths of isothermal dendrites. Results indicate that pivalic acid dendrites exhibit a subtle oscillatory behavior of the axial growth velocity near the tip, with a frequency component that is associated with the sidebranch formation process.

Received 20 July 2001

DOI:https://doi.org/10.1103/PhysRevE.65.031604

Authors & Affiliations

J. C. LaCombe^1,*, M. B. Koss², J. E. Frei³, C. Giummarra³, A. O. Lupulescu³, and M. E. Glicksman³

¹Metallurgical and Materials Engineering, Mackay School of Mines, University of Nevada, Reno, Nevada 89436
²Department of Physics, College of the Holy Cross, Worcester, Massachusetts 01610
³Materials Science and Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180

^*Electronic address: lacomj@mines.unr.edu

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Vol. 65, Iss. 3 — March 2002

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Physical Review E

covering statistical, nonlinear, biological, and soft matter physics