Fluid flow inside a beam blank mold fed through a three-port SEN (two lateral ports and one bottom port), positioned at the center of the mold, has been investigated. Literature survey shows that this kind of configuration is not frequently used. It had been shown that it is possible to get a symmetrical flow with this configuration. The downward inclination of the ports should influence the transient fluid flow. The greater the downward inclination, the greater is the instability of the jet and of the interface between the immiscible fluids that simulate the slag/metal behavior. The flow characterization was made by dye dispersion, PIV technique, measurement of the meniscus oscillation using ultrasonic sensors, and CFD simulations. The slag/metal behavior was simulated using water and oils with different physical properties. The results from PIV as well as from observations of the water–oil interface have been used to validate the CFD simulations. Oils with density close to water resulted in more instability at the interface with entrainment starting from fluid flow rate of 125 L/min (equivalent to casting speed of 1 m/min). Decreasing the viscosity of slag (oils) and increasing the casting velocity (water flow rate) result in reduction of the interfacial stability.

中文翻译：

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通过腹板中心进料的梁毛坯模具中流体流动的数值和物理模拟

已经研究了通过位于模具中心的三端口 SEN（两个横向端口和一个底部端口）供给的梁坯模具内的流体流动。文献调查表明，这种配置并不常用。已经表明，使用这种配置可以获得对称的流动。端口的向下倾斜应该影响瞬时流体流动。向下倾斜越大，射流的不稳定性和模拟渣/金属行为的不混溶流体之间的界面的不稳定性就越大。通过染料分散、PIV 技术、使用超声波传感器测量弯液面振荡和 CFD 模拟来进行流动表征。使用具有不同物理性质的水和油来模拟炉渣/金属行为。PIV 的结果以及水-油界面的观察结果已用于验证 CFD 模拟。密度接近水的油导致界面处更不稳定，从 125 L/min 的流体流速（相当于 1 m/min 的铸造速度）开始夹带。降低渣（油）的粘度和增加浇铸速度（水流量）会导致界面稳定性降低。