Modelling of twin‐roll strip casting processes

Abstract

SUMMARYIn this work, a twin-roll strip casting industrial process is analysed using a ÿxed-mesh ÿnite element formulation able to deal with unsteady incompressible thermally coupled ows including phase-change and non-Newtonian e ects assumed to account for the ow behaviour during the whole cooling conditions. The weak form of the full Navier-Stokes equations is obtained using a generalized streamline operator in order to stabilize its numerical response while a temperature-based algorithm is applied to describe the latent heat release. This proposed methodology is tested in a two-dimensional analysis of a twin-roll casting problem where an evaluation of di erent thermal and ow patterns is performed.

Design of a composite roll for twin-roll casting of Mg-AZ31

“…Various analytical and numerical approaches have been attempted for this purpose. [12][13][14][15][16][17][18][19] Recently, assuming the melt and the solidified as an incompressible nonlinear thermo-viscous material, a vertical TRC of magnesium alloy AZ31 was thoroughly analyzed by a commercial code DEFORM. 20 In this analysis, the roll was assumed to be 500 mm in diameter and 1000 mm in length, consisting of a steel core of 450 mm in diameter and a CuCoBe sleeve of 25 mm in thickness and rotating at a speed of 1 rad/s.…”

Design of Melt-Ejection Nozzle in Horizontal Twin-Roll Casting of Al-1100 by Finite-Element Analysis

“…There have been several investigations about a steady-state flow without considering the gravitational effect in a horizontal twin-roll casting [7][8][9]. However, the present study dealt with a nonsteady-state flow under the gravity; symmetry was not enforced in the analysis using only half domain.…”

Finite-Element Analysis of Melt Flow in a Vertical Twin-Roll Casting

“…Tavares and Guthrie [3] used the METFLO code to simulate three dimensional turbulent fluid flow, heat transfer and solidification in a twin-roll casting. Compared to tubular nozzle, slot nozzle was found to develop more uniform thickness of solid shell along the roll width.Cruchagaet al [4] used a fixed finite-element mesh to deal with unsteady incompressible thermally coupled flows including phase-change and non-Newtonian effects. Usinga weak form of the full Navier-Stokes equations, thermal and flow patterns were obtained for a twinroll casting of a stainless steel.Sahin et al [5] measured the interfacial heat transfer coefficient (IHTC) for a eutectic Al-Si casting on water cooled copper and steel chills during solidification.…”