Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Porous-media braking of electromagnetic stirring in the continuous casting of steel
Submission Author:
Michael Vynnycky , Stockholms län , Sweden
Co-Authors:
Michael Vynnycky
Presenter: Michael Vynnycky
doi://10.26678/ABCM.COBEM2017.COB17-2009
Abstract
Electromagnetic stirring (EMS) is applied at three locations in the continuous casting of steel, with a view to affecting the solidified crystal structure. At two of these, there is a significant mushy zone -a porous medium in which solid dendrites coexist with interdendritic melt. Whilst there exists numerous detailed magnetohydrodynamic models for the stirring of melt, both in this and other contexts, there has been no detailed treatment of the case where stirring occurs both in a melt and in an adjacent porous medium. This contribution provides a framework for such a model, starting with the case of rotary EMS applied to a round billet. In this case, the governing partial differential equations, which consist of Maxwell’s equations and the turbulent Navier-Stokes equations with a Darcy-like damping term, reduce, under a number of assumptions, to just a fourth-order system of ordinary differential equations for the angular velocity and a function which describes the radial and angular magnetic field components, with the radial coordinate as the independent variable. Preliminary numerical results are given, as well as a comparison with the case when there is no mush.
Keywords
continuous casting, electromagnetic stirring, mushy zone
