23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-R3

AN UNSTEADY FLOW-SOLVER WITH ALGEBRAIC GRID MOTION FOR AEROELASTIC SIMULATIONS

C. B. Allen
University of Bristol, UK

Keywords: unsteady flow, algebraic grid motion, euler equations, aeroelasticity

The moving and/or deforming surfaces resulting from aeroelastic simulations require deforming meshes, and it is common to use simple interpolation of surface displacements and velocities onto the initial undisturbed mesh. However, aeroelastic simulations can result in large displacements and deformations of solid surfaces, and simple interpolation of perturbations results in poor grid quality and possible grid crossover. A new grid motion technique is presented which is still simple in that it is driven solely by surface motion, but represents rotational effects near the solid surface, to maintain grid quality there.

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