Time stepping formulas: velocity prediction with sympleptic scheme
Referring to the Users' Guide and the subsection 3.7.2 on the sympleptic scheme (https://github.com/DualSPHysics/DualSPHysics/wiki/3.-SPH-formulation#37-time-stepping), what is the precise formula used to calculate the velocity at the time instant n+1/2?
This could be an addition to formula (33) if I am not mistaken. Corrections welcome.
Also, the text "During the predictor stage the values of acceleration and density" should be "During the predictor stage the values of position and density". Is that correct?