Kinematic domain decomposition for boundary-motion-induced flow simulationsA method is developed to solve the unsteady Navier-Stokes equations on a composite grid, which consists of subdomain grids moving with respect to each other. These subdomains are structured grids with different topologies. This method eliminates assuming the moving components to be instantaneously stationary, where deciding on the particular frozen instants is difficult and affects the solution adversely. Moreover, this method captures the boundary-motion-induced flow component. The method is demonstrated through a transonic flow past an airfoil, which experiences a combined motion of pitching and plunging. An O-grid around the airfoil is overlapped on a fine Cartesian grid, which is zonally embedded in a coarse Cartesian grid. The coarse grid is stationary but the other two grids are plunging. Only the O-grid is also sinusoidally pitching. The results are compared successfully with the experimental data.
Document ID
19930062814
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Baysal, Oktay (NASA Langley Research Center Hampton, VA, United States)
Yen, Guan-Wei (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
August 16, 2013
Publication Date
May 1, 1991
Subject Category
Fluid Mechanics And Heat Transfer
Meeting Information
Meeting: SIAM, Conference on Domain Decomposition Methods for Partial Differential Equations