call Particles_sinkAdvanceParticles(real, INTENT(in) :: dr_dt)
Updates sink particle postions and velocities based on gravitational accelerations, using Leapfrog or Euler, depending on the user's choice. There is also a special implementation of Leapfrog for cosmological simulations. This routine performs subcycling on sink-sink interactions, in case of very close encounters and highly eccentric orbits.
dr_dt - the current time step
written by Christoph Federrath, 2008-2015 ported to FLASH3.3/4 by Chalence Safranek-Shrader, 2010-2012 modified by Nathan Goldbaum, 2012 refactored for FLASH4 by John Bachan, 2012 removed call to AccelGasOnSinks (now called in Gravity_PotentialListOfBlocks) (CTSS, CF 2013)