Effect of Initial Conditions on the Development of Rayleigh–Taylor Instability

摘要: We present the results of a large number 2D and 3D simulations Rayleigh–Taylor instability development. The were made with help EGAK code developed at RFNC–VNIIEF performed using fine grids (for 2D, 1000 × 2000; for 3D, 10003) two ideal fluids different densities in gravitational field initial perturbations interface. an analysis compared evolutionary model turbulent mixing layer. This theoretical approach is based on idea “perturbation age” where age perturbation product its height wave number. “critical represents boundary between linear nonlinear stages development (a that problems). Central this information spectra their role appearance low wave-number modes later stage layer evolution. evolution enables adequate interpretation various peculiarities