  Coupled flow-induced flapping dynamics of flexible plates are governed by
three non-dimensional numbers: Reynolds number, mass-ratio, and non-dimensional
flexural rigidity. The traditional definition of these parameters is limited to
isotropic single-layered flexible plates. There is a need to define these
parameters for a more generic plate made of multiple isotropic layers placed on
top of each other. In this work, we derive the non-dimensional parameters for a
flexible plate of $n$-isotropic layers and validate the non-dimensional
parameters with the aid of numerical simulations.
