Phase-change techniques for finite element conduction codes
A method employing integral averaging techniques is proposed to aid conduction finite element code users in approximating multidimensional phase change problems such as: (a) liquid solidification under action of surface heat removal such as ice production or solidification of a casting, (b) thermal/chemical decomposition of a solid without removal of degraded material from the remaining virgin material such as charring of wood or reinforced plastics, (c) ablation of solids where the products of decomposition are removed on formation such as melting glass or subliming teflon. Of prime interest to the method is the determination of the amount of material solidified, decomposed, melted or sublimed and the location of the phase change interface as a function of time as it moves through the one-, two-, or three-dimensional finite element mesh. As the interface moves through each element, the energy involved in the phase change process and the difference in heat capacity and conductivity of two phases is accounted for. A method is also included to accommodate convective heat transfer at the moving phase change interface.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 6202489
- Report Number(s):
- CONF-790710-2
- Resource Relation:
- Conference: International conference on numerical methods in thermal problems, Swansea, Wales, UK, 2 Jul 1979
- Country of Publication:
- United States
- Language:
- English
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