The effects of turbulence generated in Big Bang nucleosynthesis

Abstract

The continuity equation requires that energy released in nuclear fusion flows away from the point of interaction and is not immediately thermalised into the CMB. It is seen that consequently the bulk of thermo-nuclear energy released in BBN is converted by radiation pressure to kinetic energy of gas motions and generates instability in homogeneous initial conditions. High levels of turbulence follow, triggering the Jeans mechanism and leading to the formation of galaxies and large-scale structure in the order of 10 Myrs. Friedmann cosmology is perturbed, creating a fractal Voronoi matter distribution and providing energy for reionisation. In keeping with observations, general relativity predicts that there is no bound on the size of the structures produced. The true (overall) rate of expansion is substantially below the observed (local) value of Hubble's constant, and is consistent with published estimates from the CMB for void models. The CMB is predicted to show near flatness over the observed region. It is seen from observation of fluid flows, from established physics, and from numerical solution of the Navier-Stokes equations that bisymmetric spiral vortices form where gas flows meet. These vortices necessarily have flat rotation curves at large radii and create conditions for spiral galaxy formation. It is shown by N-body simulation that enduring Sa, Sb and Sc spiral galaxies result from appropriate initial conditions. The simulations and analysis of spiral potential show that orbital velocities are greater than would be the case in an axisymmetric potential.