Cosmological General Relativistic Magnetohydrodynamic Simulations

this research involves Numerical simulations as a tool for investigating the early conditions of the universe. we will show how numerical relativity can be used for studying cosmological models. we are working on developing a large-scale simulation of the dynamical processes in the early universe. this involves looking at the interactions of dark matter, scalar perturbations, magnetic fields and turbulent plasmas and their effects on gravitational waves. for this research we are using a code based on the Cactus framework called a GRMHD code. this code uses different differencing methods to choose from at run-time. it is currently being developed and tested at the University of Houston's Maxwell cluster. These Cactus codes are composed of a framework called "the flesh" and the thorns that provide the physics. the codes used in this work are FixedCosmo and SpecCosmo, a collection of cactus thorns. written in F90, C and C++. these codes use the relativistic MHD evolution equations proposed by Duez. these tests also include MHD waves induced by gravitational waves test, the consistency of cosmological expansion test and shock tests.