Speaker
Description
The gravitational wave module in the Pencil Code is a versatile tool for computing the time-dependent three-dimensional strain field from a range of different sources in the early universe ranging from phase-transitional hydrodynamic and magnetohydrodynamic stresses to inflationary ones involving electromagnetic and axion pseudoscalar stresses. The solver utilizes the analytic solution for stresses that change linearly between two time steps. The accuracy of the strain field scales quadratically with the time step and has a low prefactor, making the relative error of the scheme comparable to that of the other variables that scale cubicly with the time step. In my talk, I will explain this in more detail and give examples of the by now 15 different published applications.
