5. Numerical Methods

These tutorials examine the numerical choices behind an OpenSn calculation.

• 5.1. Angular Discretization
  • 5.1.1. Angular Operator Construction Methods
  • 5.1.2. Isotropic Scattering in a P4 Representation
  • 5.1.3. Anisotropic Boundary Sources with Delta-Forward Scattering
  • 5.1.4. Strongly Forward-Peaked Scattering
• 5.2. Iterative Methods
  • 5.2.1. Comparing Inner Transport Solvers
  • 5.2.2. GMRES Convergence Controls
  • 5.2.3. Inner-Solver Convergence with Scattering
• 5.3. Acceleration
  • 5.3.1. TGDSA: Two-Grid Diffusion Synthetic Acceleration
  • 5.3.2. WGDSA and TGDSA in a Multigroup Source-Detector Problem
  • 5.3.3. DSA Options on Regular Grids: Boundary Closure and Penalty Length
  • 5.3.4. DSA on Distorted Meshes: Why the Penalty Length Is Capped
  • 5.3.5. SCDSA: Spatially Consistent Diffusion Synthetic Acceleration
  • 5.3.6. CMFD: Coarse Mesh Finite-Difference Acceleration
  • 5.3.7. SMM: Second-Moment Method Acceleration