The field of Computational Fluid Dynamics (CFD) has always been interested in solving problems involving relative movement of structural geometries. The Chimera method along with embedded approach are proved to be the best with a combination of high performance and accuracy. In this thesis the implementation of Chimera method on a multi-step Finite Element (FE) based CFD code is discussed. Existing Chimera implementation on a FE based monolithic fluid solver was extended to the multi-step solver. This allow us to run simulations with less computational cost. The Chimera implementation was also extended to Fluid Structure Interaction (FSI) problems. FSI problems involving large structure movements are cumbersome to perform as re-meshing may be required at some stage. Application of Chimera on FSI enable us to run simulations without the need of re-meshing. A novel algorithm was developed to deal with multiple overlapping patches in the Chimera method. This algorithm also deals with patch moving out of the computational domain. The algorithm proved to be efficient and capable of dealing with multiple patches in the background. These patches can overlap with each other or can be partly out of domain. The methods developed in the present works were verified by applying them to some benchmark cases. The accuracy of the method was assessed by systematic mesh refinement. Number of example simulations were performed to show potential of the developed methods. This involves moving body simulations of engineering interest and other complex simulations involving moving structures.     «

The field of Computational Fluid Dynamics (CFD) has always been interested in solving problems involving relative movement of structural geometries. The Chimera method along with embedded approach are proved to be the best with a combination of high performance and accuracy. In this thesis the implementation of Chimera method on a multi-step Finite Element (FE) based CFD code is discussed. Existing Chimera implementation on a FE based monolithic fluid solver was extended to the multi-step...     »