| An isothermal model of the meniscus that forms between the casting nozzle and transporting conveyor in the continuous strip casting process is presented. The meniscus natural frequency and amplitude were measured using an impulse disturbance for water and mercury over a range of geometric parameters. For both wetting and non-wetting conditions, the experimental results showed that the meniscus natural frequency increases with supply channel height and decreases with supply channel length. Decreasing the height of the meniscus was found to increase the natural frequency. A semi-empirical model for the meniscus natural frequency and damping is presented and compared to the results of experiments with very good agreement.;Under flow conditions, the meniscus oscillations were found to be random with a narrow frequency range centered on the corresponding natural frequency. The mean square energy of the meniscus oscillations was found to increase with the square of the flow velocity. Particle image velocimetry of the fluid flow and meniscus motion revealed a recirculating region downstream of the meniscus and a relationship between vortices in this recirculation region and the meniscus motion. |
