Improved ALE mesh velocities for moving bodies

A Laplacian smoothing of the mesh velocities with variable diffusivity based on the distance from moving bodies is introduced. This variable diffusivity enforces a more uniform mesh velocity in the region close to the moving bodies. Given that in most applications these are regions where small elements are located, the new procedure decreases element distortion considerably, reducing the need for local or global remeshing, and in some cases avoiding it altogether.

[1]  J. Batina Unsteady Euler airfoil solutions using unstructured dynamic meshes , 1989 .

[2]  Rainald Löhner,et al.  An adaptive finite element solver for transient problems with moving bodies , 1988 .

[3]  Rainald Loehner,et al.  A new ALE adaptive unstructured methodology for the simulation of moving bodies , 1994 .

[4]  J. Bonet,et al.  An alternating digital tree (ADT) algorithm for 3D geometric searching and intersection problems , 1991 .

[5]  Dorothee Martin,et al.  An implicit, linelet-based solver for incompressible flows , 1992 .

[6]  Rainald Löhner,et al.  Three-dimensional fluid-structure interaction using a finite element solver and adaptive remeshing , 1990 .

[7]  Luca Formaggia,et al.  Simulation of a store separation using the finite element method , 1988 .

[8]  Russ D. Rausch,et al.  Three-dimensional time-marching aeroelastic analyses using an unstructured-grid Euler method , 1992 .

[9]  Rainald Loehner,et al.  Numerical simulation of pilot/seat ejection from an F-16 , 1993 .

[10]  Rainald Löhner,et al.  Some useful data structures for the generation of unstructured grids , 1988 .

[11]  Todd R. Quackenbush,et al.  High accuracy computation of fluid-structure interaction in transonic cascades , 1993 .

[12]  V. Venkatakrishnan,et al.  IMPLICIT METHOD FOR THE COMPUTATION OF UNSTEADY FLOWS ON UNSTRUCTURED GRIDS , 1995 .

[13]  Oddvar O. Bendiksen,et al.  Unsteady Transonic Two-Dimensional Euler Solutions Using Finite Elements , 1993 .

[14]  Philippe Rostand,et al.  Algebraic turbulence models for the computation of two-dimensional high-speed flows using unstructured grids , 1989 .