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This paper is concerned with the two-fluid flow and heat trans-fer in the continuous steel casting process under electromagnetic (EM) force. The governing equations consist of the Navier-Stokes equations, the continuity equation, and the energy equation. The influence of the EM field on the flow pattern, the meniscus shape, and temperature distribu...
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Context 1
... horizontal direction toward the center line. This force will prevent the steel from sticking to the mould wall. The results also show that the magnitude of the force increases as the current density increases. Figure 4 shows the influence of source current density on the velocity and temperature fields. The results indicate that the magnitude of source current density has a considerable effect on the flow and temperature fields. It is noted that a higher source ...
Context 2
... form a thicker solidified shell. Figure 4 shows the effect of varying the source current density on the temperature profiles in the meniscus. It can be clearly seen that, with the increase of source current density, the temperature on the meniscus decreases significantly. In the case with J s e = 10 5 A/m 2 , the upper flow is too weak and this causes the temperature on the upper region drops faster. We can conclude that the EM field applied to the system has significant effect on the flow, the meniscus shape, and the temperature distribution. Using high current density, the velocity reduces and consequently the meniscus shape becomes flat and the temperature decreases. We should also emphasize that to improve the accuracy of results, the effect of mould movement must be included. Therefore, further research will be carried out to include the effect of mould movement. The authors gratefully acknowledge the support of the Office of the Higher Education Commission and the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (Grant No. PHD/0212/2549), and an Australia Research Council Discovery project grant. The paper entitled “Numerical Simulation of Three-Dimensional Fluid Flow and Heat Transfer in Electromagnetic Steel Casting” published in 2009; volume 52: page 373-390 is also supported by the above ...
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Citations
... Over the last few decades, most of the research efforts have been focussed on investigating the flow pattern and heat transfer problems in the continuous casting process [1], [4], [7], [9], [11], [18], [21]. Mookum [12], [13] presented a mathematical model to study the effect of electromagnetic field on the flow and temperature fields. The results indicated that the electromagnetic force reduced the speed of the molten steel near the mould wall. ...
... To solve the steady state system of equations (24) and (25), we can solve first equation (24) forφ and then use this solution to solve equation (25) forÃ. For the finite element solution of u i , p, T, ϕ, K and ε, the variational statement for the boundary value problem corresponding to the the equations (4), (5), (6), (12), (13), and (14) subjected to relevant boundary conditions is established as follows: ...
This paper aims to study the effect of turbulence on the flow of two fluids and the heat transfer - solidification process in electromagnetic continuous steel casting. The complete set of field equations is established. The flow pattern of the fluids, the meniscus shape and temperature field as well as solidification profiles obtained from the model with and with no turbulence effect are presented. The results show that the model with turbulence gives a large circulation zone above the jet, much larger variation of the meniscus geometry, a slow solidification rate and higher temperature in the top part of the strand region.
