“…2019; Mansoor et al. 2020). Figure 3.Schlieren images of the multi-mode interface evolution for large- cases.…”
Section: Resultsmentioning
confidence: 99%
“…2014; Mansoor et al. 2020). However, the linear stage still exists for a very large initial at the expense of a large reduction in the duration of the linear stage (Rikanati et al.…”
Section: Resultsmentioning
confidence: 99%
“…The influence of the initial amplitude of mode on the RM instability can be studied by varying (Mansoor et al. 2020; Sewell et al. 2021).…”
Section: Experimental Methodsmentioning
confidence: 99%
“…A near-sinusoidal interface dominated by one mode was generated by a novel membraneless technique where cross-flowing air was separated from SF by an oscillating splitter plate (Mansoor et al. 2020), and the effects of the initial amplitude on the perturbation width growth and mixing transition have been discussed, and earlier mixing transitions for higher amplitude-to-wavelength ratio cases are noted from experiments.…”
Shock-tube experiments on eight kinds of two-dimensional multi-mode air–SF
$_6$
interface with controllable initial conditions are performed to examine the dependence of perturbation growth on initial spectra. We deduce and demonstrate experimentally that the amplitude development of each mode is influenced by the mode-competition effect from quasi-linear stages. It is confirmed that the mode-competition effect is closely related to initial spectra, including the wavenumber, the phase and the initial amplitude of constituent modes. By considering both the mode-competition effect and the high-order harmonics effect, a nonlinear model is established based on initial spectra to predict the amplitude growth of each individual mode. The nonlinear model is validated by the present experiments and data in the literature by considering diverse initial spectra, shock intensities and density ratios. Moreover, the nonlinear model is successfully extended based on the superposition principle to predict the growths of the total perturbation width and the bubble/spike width from quasi-linear to nonlinear stages.
“…2019; Mansoor et al. 2020). Figure 3.Schlieren images of the multi-mode interface evolution for large- cases.…”
Section: Resultsmentioning
confidence: 99%
“…2014; Mansoor et al. 2020). However, the linear stage still exists for a very large initial at the expense of a large reduction in the duration of the linear stage (Rikanati et al.…”
Section: Resultsmentioning
confidence: 99%
“…The influence of the initial amplitude of mode on the RM instability can be studied by varying (Mansoor et al. 2020; Sewell et al. 2021).…”
Section: Experimental Methodsmentioning
confidence: 99%
“…A near-sinusoidal interface dominated by one mode was generated by a novel membraneless technique where cross-flowing air was separated from SF by an oscillating splitter plate (Mansoor et al. 2020), and the effects of the initial amplitude on the perturbation width growth and mixing transition have been discussed, and earlier mixing transitions for higher amplitude-to-wavelength ratio cases are noted from experiments.…”
Shock-tube experiments on eight kinds of two-dimensional multi-mode air–SF
$_6$
interface with controllable initial conditions are performed to examine the dependence of perturbation growth on initial spectra. We deduce and demonstrate experimentally that the amplitude development of each mode is influenced by the mode-competition effect from quasi-linear stages. It is confirmed that the mode-competition effect is closely related to initial spectra, including the wavenumber, the phase and the initial amplitude of constituent modes. By considering both the mode-competition effect and the high-order harmonics effect, a nonlinear model is established based on initial spectra to predict the amplitude growth of each individual mode. The nonlinear model is validated by the present experiments and data in the literature by considering diverse initial spectra, shock intensities and density ratios. Moreover, the nonlinear model is successfully extended based on the superposition principle to predict the growths of the total perturbation width and the bubble/spike width from quasi-linear to nonlinear stages.
“…78 describes a ratio of the burned (ρ b ) and unburned (ρ ub ) gas density. In literature 33,34 , typical values for the growth parameter cases. After transitioning to the power law the differences between both cases become apparent, as the mixing width growth diminishes quickly for the reactive case.…”
Hydrodynamic instabilities caused by shock-flame interactions are a fundamental challenge in the accurate prediction of explosion loads in the context of nuclear and process plant safety. To investigate the Richtmyer-Meshkov instability (RMI), a series of three dimensional numerical simulations of shock-flame interactions is performed, including lean, stoichiometric and nonreactive homogeneous H 2 /Air mixtures. The equivalence ratio has a strong influence on the achievable flame wrinkling and mixing, by impacting key physical parameters such as the heat release parameter, flame thickness and reactivity. The reactiv-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
