Journal article
Scaling procedure and finite volume computations of phase-change problems with convection
Engineering analysis with boundary elements, Vol.16(2), pp.123-147
1995
DOI: 10.1016/0955-7997(95)00050-X
Abstract
In this paper, solidification problems are investigated from two angles, namely, the issue of wide disparity of important length scales present in phase change processes, and the finite volume based computational techniques developed to simulate such processes. To appropriately handle phase change phenomena, a scaling analysis is presented to bring out the relevant physics at the macroscopic and morphological scales. It is demonstrated that an appropriate choice of the scale is necessary to obtain numerical solutions economically. Two different finite volume techniques are described in this paper. The first technique involves a mixed Eulerian/Lagrangian approach, where the interface is explicitly tracked by means of marker particles, and the field equations are solved on an underlying fixed, finite volume grid. The other approach is an enthalpy model which incorporates the interface information in a field variable called the phase-fraction. This volume averaged technique enables the implicit handling of the interface as part of the solution procedure at the cost of smearing out the discontinuity. Two different phase-fraction update techniques are presented and their relative effectiveness and performance discussed. A continuous ingot casting problem modelled by accounting for the interaction of phase-change and turbulent transport is also presented and compared with experimental results.
Details
- Title: Subtitle
- Scaling procedure and finite volume computations of phase-change problems with convection
- Creators
- Wei ShyyM.M RaoH.S Udaykumar
- Resource Type
- Journal article
- Publication Details
- Engineering analysis with boundary elements, Vol.16(2), pp.123-147
- DOI
- 10.1016/0955-7997(95)00050-X
- ISSN
- 0955-7997
- eISSN
- 1873-197X
- Publisher
- Elsevier Ltd
- Language
- English
- Date published
- 1995
- Academic Unit
- Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984064211502771
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