Although computational tools are well suited for modeling the dynamics of zero-net mass-flux actuators, the computational costs involved in large-scale flow control simulations necessitate the use of reduced-order models for these devices. A new reduced-order model based on modeling only the slot of ZNMF jets in grazing flows is proposed. A parametric study of dimensionless parameters governing the characteristics of a ZNMF jet in grazing flow was conducted for the reduced-order model along with the commonly used sinusoidal plug flow boundary condition and full cavity simulations. Comparisons of the current model are presented in terms of the vortex dynamics and mean integral quantities, and the performance of the new reduced-order model is encouraging. In addition, the fidelity of the model has also been explored for a canonical separated flow. On the global scale of the flow, the reduced-order model is able to provide a more accurate representation of the full cavity simulation as compared to the conventional boundary condition.
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