High-Order Methods For Wave Propagation
Abstract
In order to meet the demanding accuracy requirements in the simulation of wave propagation phenomena, a numerical approach based on high-resolution spatial schemes is presented. The time-domain AFRL code, FDL3DI, solves either the time-dependent Maxwell's equations (for CEM) or the Euler equations (for acoustics) employing 6th-order accurate compact-differences and low-pass spatial filters of up to 10th-order accuracy. The solver has been made applicable to general curvilinear grids through the incorporation of a careful treatment of the coordinate transformation metrics. In addition, the method has been extended to multi-body scattering applications through the use of overset grids and high-order interpolation. A robust absorbing boundary condition exploiting the transfer function of the low-pass filter has been developed. To evaluate the solver, several benchmark problems have been considered. Application to communication through weakly ionized plasma has also been studied.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2008
- Accession Number
- ADA476109
Entities
People
- Michael D. White
- Miguel R. Visbal
- Scott E. Sherer
Organizations
- Air Force Research Laboratory