Solidification of a Sphere: The Effects of Thermal Contraction and Density Change Upon Freezing

[+] Author and Article Information
J. M. Forgac, T. P. Schur, J. C. Angus

Chemical Engineering Department, Case Western Reserve University, Cleveland, Ohio 44106

J. Appl. Mech 46(1), 83-89 (Mar 01, 1979) (7 pages) doi:10.1115/1.3424533 History: Received August 01, 1977; Revised August 01, 1978; Online July 12, 2010


The stress and internal pressure in a solidifying sphere are calculated as a function of heat transfer rate and the density change upon freezing. A numerical solution to the heat transfer problem and a linear isotropic thermoelastic model for the solid are used to describe the solidification process. Results are presented for a model material with typical metallic properties. Heat transfer effects alone cause compression and the density increase upon freezing by itself produces tension within the liquid core. Thermal compression effects can dominate during the early stages of solidification, but only at relatively high rates of heat transfer. The effect of the density change dominates in the later stages and the liquid core goes into tension. It is unlikely that sustained high pressures can be generated within solidifying spheres. The model indicates regimes of low stress where the solid shell may be expected to remain intact during the initial stages of solidification.

Copyright © 1979 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In