Comparison of nearby-interaction of two rigid/deformable circular particles in shear flow

In this study, fluid-structure interaction is studied by using of Lattice-Boltzmann-Lattice Spring Model (IB-LB-LSM). In this hybrid method, second-order accuracy is achieved by adopting split-forcing technique. The immersed-boundary method which is known as a fixed-mesh method is implemented to calculate boundary force. To apply deformation of elastic solid due to vicinal fluid, Lattice Spring Model (LSM) is utilized in which solid is substituted by collection of springs. In numerical method section of this paper, a implicit algorithm based on lattice spring model is represented which it can easily combine with fluid solvers and promote previous explicit method. Validation of structure and fluid solver are done by simulation of cantilever beam and motion of single particle in shear flow, respectively. In the results section, nearby motions of circular particles in shear flow are compared for two different types of rigid and deformable condition which it is shown how the deflection of solid body changes particles path.