NUMERICAL ANALYSIS OF BINARY SOLID-LIQUID PHASE CHANGE WITH BUOYANCY AND SURFACE TENSION DRIVEN CONVECTION
- 1 December 1989
- journal article
- research article
- Published by Taylor & Francis in Numerical Heat Transfer, Part A: Applications
- Vol. 16 (4) , 407-427
- https://doi.org/10.1080/10407788908944724
Abstract
The effects of thermo/diffusocapillary convection on the solidification of aqueous NH4Cl in a rectangular cavity have been simulated numerically using a newly developed continuum model. Diffusocaptttary convection is negligible relative to thermocapillary convection, and for a 20 × 20 mm cavity in a one-gravity environment, thermocapillary effects are most pronounced during the early stages of solidification, when flow conditions are characterized by three major cells. One cell, driven by solutal buoyancy forces, extends from the mushy region to the melt and separates top and bottom melt region cells driven primarily by surface tension and buoyancy forces, respectively. With increasing time, however, the top cell strengthens and eventually envelops the entire melt. In terms of the strength of the flow, the liquidus front morphology, and the amount of solid formed, final conditions differ only slightly from those predicted for pure thermal/solutal convection.Keywords
This publication has 10 references indexed in Scilit:
- A continuum model for momentum, heat and species transport in binary solid-liquid phase change systems—I. Model formulationPublished by Elsevier ,2003
- NUMERICAL ANALYSIS OF BINARY SOLID-LIQUID PHASE CHANGE USING A CONTINUUM MODELNumerical Heat Transfer, 1988
- A continuum model for momentum, heat and species transport in binary solid-liquid phase change systems—II. Application to solidification in a rectangular cavityInternational Journal of Heat and Mass Transfer, 1987
- Design of a thermocapillary flow experiment in reduced gravityJournal of Thermophysics and Heat Transfer, 1987
- Numerical simulation of double-diffusive Marangoni convectionPhysics of Fluids, 1986
- COMBINED BUOYANCY- AND THERMOCAPILLARY-DRIVEN CONVECTION IN OPEN SQUARE CAVITIESNumerical Heat Transfer, 1986
- High Marangoni number convection in a square cavityPhysics of Fluids, 1985
- Fluid Mechanics in Crystal Growth—The 1982 Freeman Scholar LectureJournal of Fluids Engineering, 1983
- Theoretical Analysis and Model Experiments on the Formation Mechanism of Channel-type SegregationTransactions of the Iron and Steel Institute of Japan, 1978
- The effect of surface driven flows on the dissolution of a partially immersed solid in a liquid-analysisChemical Engineering Science, 1970