Gas jet impinging on liquid surface: Cavity shape modelling and video-based estimation

Abstract A water model is studied to simulate physical phenomena in the LD steel converter. The depression in the liquid, due to the impinging gas jet, is measured by means of a video camera. Image processing tools together with a nonlinear mathematical model based on the physics of the liquid-gas system, are used to describe the cavity profile. The properties of the model are investigated. A quantification of the uncertainty of the cavity depth estimates is given and the frequency content of the oscillations of the indentation profile is characterized by using the Fast Fourier Transform.