Ogen: An Overlapping Grid Generator for Overture. We describe how to generate overlapping grids for use with Overture using the ogen program. The user must first generate Mappings to describe the geometry (a set of overlapping grids whose union covers the domain). The overlapping grid then is constructed using the Ogen grid generator. This latter step consists of determining how the different component grids interpolate from each other, and in removing grid points from holes in the domain, and removing unnecessary grid points in regions of excess overlap. This document includes a description of commands, presents a series of command files for generating various overlapping grids and describes the overlapping grid algorithm. The ogen program can also be used to build unstructured hybrid grids where the overlap is replaced by an unstructured grid.

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  1. Angel, Jordan B.; Banks, Jeffrey W.; Henshaw, William D.; Jenkinson, Michael J.; Kildishev, Alexander V.; Kovačič, Gregor; Prokopeva, Ludmila J.; Schwendeman, Donald W.: A high-order accurate scheme for Maxwell’s equations with a generalized dispersive material model (2019)
  2. Wachs, Anthony: Particle-scale computational approaches to model dry and saturated granular flows of non-Brownian, non-cohesive, and non-spherical rigid bodies (2019)
  3. Banks, J. W.; Henshaw, W. D.; Schwendeman, D. W.; Tang, Qi: A stable partitioned FSI algorithm for rigid bodies and incompressible flow in three dimensions (2018)
  4. Koblitz, A. R.; Lovett, S.; Nikiforakis, N.; Henshaw, W. D.: Direct numerical simulation of particulate flows with an overset grid method (2017)
  5. Banks, J. W.; Henshaw, W. D.; Kapila, A. K.; Schwendeman, D. W.: An added-mass partition algorithm for fluid-structure interactions of compressible fluids and nonlinear solids (2016)
  6. Li, L.; Henshaw, W. D.; Banks, J. W.; Schwendeman, D. W.; Main, A.: A stable partitioned FSI algorithm for incompressible flow and deforming beams (2016)
  7. Broering, Timothy M.; Lian, Yongsheng: Numerical study of tandem flapping wing aerodynamics in both two and three dimensions (2015)
  8. Li, Longfei; Braun, R. J.; Maki, K. L.; Henshaw, W. D.; King-Smith, P. E.: Tear film dynamics with evaporation, wetting, and time-dependent flux boundary condition on an eye-shaped domain (2014)
  9. Borazjani, Iman; Ge, Liang; Le, Trung; Sotiropoulos, Fotis: A parallel overset-curvilinear-immersed boundary framework for simulating complex 3D incompressible flows (2013)
  10. Appelö, Daniel; Banks, Jeffrey W.; Henshaw, William D.; Schwendeman, Donald W.: Numerical methods for solid mechanics on overlapping grids: linear elasticity (2012)
  11. Banks, Jeffrey W.; Henshaw, William D.; Schwendeman, Donald W.: Deforming composite grids for solving fluid structure problems (2012)
  12. Benoit, Christophe; Péron, Stéphanie: Automatic structured mesh generation around two-dimensional bodies defined by polylines or polyC1 curves (2012)
  13. Daude, F.; Berland, J.; Emmert, T.; Lafon, P.; Crouzet, F.; Bailly, C.: A high-order finite-difference algorithm for direct computation of aerodynamic sound (2012)
  14. Hagstrom, Thomas; Hagstrom, George: Grid stabilization of high-order one-sided differencing. II: Second-order wave equations (2012)
  15. Soni, Kunal; Chandar, Dominic D. J.; Sitaraman, Jayanarayanan: Development of an overset grid computational fluid dynamics solver on graphical processing units (2012)
  16. Sitaraman, Jayanarayanan; Floros, Matthew; Wissink, Andrew; Potsdam, Mark: Parallel domain connectivity algorithm for unsteady flow computations using overlapping and adaptive grids (2010)
  17. Henshaw, William D.; Chand, Kyle K.: A composite grid solver for conjugate heat transfer in fluid-structure systems (2009)
  18. Sjogreen, Bjorn; Yee, H. C.: Variable high order multiblock overlapping grid methods for mixed steady and unsteady multiscale viscous flows (2009)
  19. Henshaw, William D.; Schwendeman, Donald W.: Parallel computation of three-dimensional flows using overlapping grids with adaptive mesh refinement (2008)
  20. Uzun, Ali; Hussaini, M. Yousuff: Investigation of high frequency noise generation in the near-nozzle region of a jet using large eddy simulation (2007)

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