A Deferred Correction Coupling Strategy for Cosmological Simulations
Authors: Jean M. Sexton (Lawrence Berkeley National Laboratory)
Abstract: We present a strategy for coupling the equations of baryonic gas dynamics to those for radiative heating and cooling in the context of Nyx, an N-body + gas dynamics code for large-scale cosmological simulations. The radiative and advective processes have differing time scales. To avoid Strang splitting errors, we couple the processes with a simplified spectral deferred correction strategy. Preliminary results indicate that the improved coupling strategy improves stability and reduces the cost of integrating the heating and cooling terms for our Lyman-alpha forest test case.
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