Numerical and Physical Simulation of the Fluid Flow in a Beam Blank Mold Fed Through the Center of the Web
- PDF / 5,369,365 Bytes
- 16 Pages / 593.972 x 792 pts Page_size
- 0 Downloads / 187 Views
fluid flow features is essential in order to understand the phenomena inside a beam blank mold, for improving the quality of the product, minimizing the defects, and increasing the productivity. Physical and mathematical modeling have been routinely used for this purpose. The knowledge of how the flow is distributed inside the mold is important to assess the behavior of slag/ metal interface. Shen et al.[1] reported that there is a correlation between the characteristics of the jet and the meniscus behavior. Zhang et al.[2] showed that the impingement point and the fluid flow velocity influence the characteristics of the waves formed at the meniscus.
WESLEI VIANA GABRIEL, JOHNE JESUS MOL PEIXOTO, GUILHERME SANTIAGO QUEIROZ, CARLOS ANTONIO DA SILVA, and ITAVAHN ALVES DA SILVA are with the Department of Metallurgical Engineering and Materials, Federal University of Ouro Preto, Morro do Cruzeiro, Ouro Preto, MG 35400-000, Brazil. Contact e-mail: [email protected] VARADARAJAN SESHADRI is with the Department of Metallurgical Engineering and Materials, Federal University of Minas Gerais, 6627, Av. Antonio Carlos, Belo Horizonte, 31270-901, Brazil. Manuscript submitted February 1, 2019.
METALLURGICAL AND MATERIALS TRANSACTIONS B
According to Theodorakakos and Bergeles[3] depending of the width and length of the wave, the slag/metal interface becomes unstable causing entrainment of slag. The configuration of the SEN (Submerged Entry Nozzle) influences the fluid flow.[4] Accordingly Mishra et al.,[5] nozzles with oval internal section have advantages in comparison to circular nozzles for molds with narrow sections. Besides, rectangular outlet ports improve the fluid flow distribution. The fluid flow also influences the thermal flow. Zhang et al.[2] observed that increasing the velocity gradient increases the thermal gradient, causing differences in the shell thickness. Many feeding systems used in a beam blank mold promote a non-uniform distribution inside the mold. Beaton et al.[6] and De Santis et al.[7] reported that depending on the SEN configuration, it could cause high velocity in some regions of the mold, thus inhibiting the shell development.[8] Gabriel et al.[9] reported that near the impingement point the intensity of meniscus oscillation is higher. This leads to oil entrainment during physical tests that simulate the slag/metal interface.[10] Many studies have been carried out to understand the behavior of the slag/metal interface in continuous casting molds. In physical models, it is common to use water and oils to simulate liquid steel and liquid slag, respectively. Harman and Cramb[11] reported that
increasing density difference, interfacial tension, and oil viscosity inhibit the emulsification of the lighter fluid. Besides, continuous casting parameters also influence the stability of the interface. Liuyi et al.[12] demonstrated that decreasing the SEN immersion depth increases the turbulence at the interface. On the other hand, a high immersion depth inhibits the shell development at the mold output and decreases the m
Data Loading...
