A reduced mesh movement method based on pseudo elastic solid for fluid–structure interaction

Abstract

A reduced mesh movement method based on pseudo elastic solid is developed and applied in fluid–structure interaction problems in this paper. The flow mesh domain is assumed to be a pseudo elastic solid. The vibration equation for the structure and the pseudo elastic solid together is derived by applying the displacement continuity condition on the fluid–structure interface. Considering that the actual fluid–structure coupled vibration for structures often appears to be associated with low-order modes, the nodal displacements for the structure and the flow mesh can be computed using the modal superposition of a few low-order modes. Coupled fluid–structure computations are performed for flutter problems of a beam and wing 445.6 using the present method. The calculated results are consistent with the data reported in other references. The computing time is reduced by 65.5% for the beam flutter and 54.8% for the wing flutter compared with the pre-existing elastic solid method.

An efficient coupling algorithm of fluid structure interaction for marine propeller flow

“…In this paper, the fast dynamic mesh method reported in literature [6] is applied in the research of the fluid structure interaction of propellers. The decoupled dynamic equations in modal coordinates of the propeller-pseudo elastic solid system can be derived through modal analysis and coordinate transformation.…”

“…The computational efficiency of fluid structure coupling algorithms is usually low [4] because of the iterative calculations of the flow and the flow dynamic mesh of which the freedom quantity is always above 1 million for every time step. The computing time can be reduced by 50 % with a fast dynamic mesh method proposed by the present author of this paper in 2017 [5], [6]. The fast dynamic mesh method can just accelerate the calculation of the flow mesh deformation.…”

Dynamic adaptive mesh refinement of fluid structure interaction using immersed boundary method with two stage corrections

“…It is also not always easy to conduct experiments on speci c problems due to the high cost and the scarcity of the required facilities. Numerical simulations are often considered as a solution to complex problems when investigating the basic phenomenon involved in uidstructure interactions [4,5]. Numerical simulations are usually supported by experimental results in many scienti c and engineering elds, thereby eliminating or reducing the need to carry out several experiments.…”