Local Exact Particle Tracing on Unstructured Grids

Acoustic Ray-Tracing on Unstructured Adaptive Grids

A computationally efficient acoustic ray-tracing code based on unstructured adaptive grids is described in detail. The use of unstructured grids allows wave propagation simulations on complex computational domains. Detailed surface layer physics is included to take into account the atmospheric variability under different stability conditions and landuse inhomogeneities. The ray-tracing model ha...

Transonic Turbulent Flow Computations on Unstructured Triangular Grids

New Approaches for Particle Tracing on Sparse Grids

Flow visualization tools based on particle methods continue to be an important utility of ow simulation. Additionally, sparse grids are of increasing interest in numerical simulations. In 13] we presented the advantages of particle tracing on uniform sparse grids. Here we present and compare two diierent approaches to accelerate particle tracing on sparse grids. Furthermore, a new approach is p...

A New Implicit Dissipation Term for Solving 3D Euler Equations on Unstructured Grids by GMRES+LU-SGS Scheme

Due to improvements in computational resources, interest has recently increased in using implicit scheme for solving flow equations on 3D unstructured grids. However, most of the implicit schemes produce greater numerical diffusion error than their corresponding explicit schemes. This stems from the fact that in linearizing implicit fluxes, it is conventional to replace the Jacobian matrix in t...

Particle Tracing Algorithms for 3D Curvilinear Grids

This paper presents a comparison of several particle tracing algorithms on curvilinear grids. The fundamentals of particle tracing algorithms are described and used to split tracing algorithms into basic components. Based on this decomposition, two diierent strategies for particle tracing are described in greater detail: tracing in computational space and tracing in physical space. Accuracy and...