Go to previous page Go up Go to next page

3.1 Software libraries and toolkits

More recently, particularly in work on fully generic spacetimes, where all three spatial dimensions must be treated numerically, there has been a strong trend towards the use of higher-level software libraries and modular “computational toolkits” such as Cactus [74] (External Linkhttp://www.cactuscode.org). These have a substantial learning overhead, but can allow researchers to work much more productively by focusing more on numerical relativity instead of computer-science and software-engineering issues such as parameter-file parsing, parallelization, I/O, etc.

A particularly important area for such software infrastructure is mesh refinement5. This is essential to much current numerical-relativity research but is moderately difficult to implement even in only one spatial dimension, and much harder in multiple spatial dimensions. There are now a number of software libraries providing multi-dimensional mesh-refinement infrastructure (sometimes combined with parallelization), such as those listed in Table 1. The External LinkCactus toolkit can be used in either unigrid or mesh-refinement modes, the latter using a “mesh-refinement driver” such as PAGH or Carpet [134Jump To The Next Citation Point131Jump To The Next Citation Point] (External Linkhttp://www.carpetcode.org).

In this review I point out event and apparent horizon finders which have been written in particular frameworks and comment on whether they work with mesh refinement.

Table 1: This table lists some software toolkits for multi-dimensional mesh refinement. All these toolkits also provide parallelization.

  Go to previous page Go up Go to next page