  In this paper a new monolithic Eulerian formulation in the framework of
non-classical continuum is presented for the analysis of fluid-strucuture
interaction problems. In this respect, Cosserat continuum theory taking into
account the micro-rotational degrees of freedom of the particles is considered.
Continuum description of the model and variational formulation of the governing
flow dynamics for non-classical -fluid-structure interaction nCFSI is
presented. The model is analyzed by computing a well known benchmark problem by
Hecht and Pironneau (2017). The algorithmic description is presented and
implemented using FreeFEM++. Code is validated with the benchmark solution of
Turek and Hron (2006) in case of flow around a flag attached with cylinder. New
microstructural behavior of the solution is studied and numerical simulations
and results are shown in the form of figures. Some interesting feature of the
flow is observed and microstructural characteristics are discussed.
