Thursday, Jan 19, 2017 - 3:30pm - Allen 14
High-order and adaptive finite element simulation of fluid-structure interaction instabilities.
Dr. Manav Bhatia, Department of Aerospace Engineering, Msstate
Title: High-order and adaptive finite element simulation of fluid-structure interaction instabilities.
Abstract: Static and dynamic instabilities arising from fluid-structure interactions (FSI), such as aeroelastic divergence and flutter phenomena, are important metrics for flight vehicle performance. Conventionally, time-accurate simulations have been used to estimate the damping and frequency characteristics of the multi-physics response. This talk discusses the challenges inherent to such an approach and then focuses on methods to improve the robustness and computational efficiency of procedures to predict FSI instabilities. The concept of small-disturbances is used to linearize the nonlinear dynamic system of equations and pose the problem as a linear stability eigensolution. Both fluid and structural models are discretized with high-order schemes and convergence rates are established for the simulation. Finally, preliminary results are discussed on error-estimation and h-adaptive simulation for the class of problems studied here.