Far field boundary conditions based on characteristic and bicharacteristic theory applied to transonic flows
The influence of two different far boundary conditions on the solution of a transonic profile flow is studied when the distance to the outer grid boundary is reduced. One of the boundary conditions makes use of characteristics in one dimensional flows . The other results from an analysis of bicharacteristic in two dimensional flows .
These boundary conditions were combined with a cell-vertex method for solving the Euler equations in two dimensions. The method was used to simulate the transonic flow past a NACA0012 profile set at an angle of attack of one degree and a free stream Machnumber of 0.85.
KeywordsEuler Equation Drag Coefficient Outer Boundary Lift Coefficient Transonic Flow
Unable to display preview. Download preview PDF.
- 1.Salas, M.D.; Thomas, J.L.: Far-field boundary conditions for transonic lifting solutions to the Euler equations. AIAA Journal, Vol. 24, No. 7, July 1986, pp 1079–1080.Google Scholar
- 2.Roe, P.L: Remote boundary conditions for unsteady multidimensional aerodynamic computations. ICASE Report 86-75, Nova 1986.Google Scholar
- 3.Ni, R.-H.: A Multiple-Grid Scheme for Solving the Euler Equations, AIAA Journal, Vol. 20, No. 11, Nov. 1982.Google Scholar
- 4.Hall, M.G.: Fast Multigrid Solution of the Euler Equations using a Finite Volume Scheme of Lax-Wendroff Type. RAE Technical Report 84013, 1984.Google Scholar
- 5.Hall, M.G.: Cell vertex schemes for solution of the Euler equations. Proc. of the Conf. on Num. Methods for Fluid Dynamics, University of Reading, 1985.Google Scholar
- 6.Jameson, A.: Numerical Solution of the Euler Equations for Compressible Inviscid Fluids, Report MAE 1643, Princeton University.Google Scholar