Pengujian metode smoothed particles hydrodynamics untuk memenuhi hukum kekekalan massa dan energi aliran air 3 dimensi ketika melalui penyempitan pipa vertikal = Testing smoothed particles hydrodynamics method to fulfil conservation of mass and energy of 3 dimensional fluid flow through constriction of vertical pipe - Betania Caesariratih Lydiana, author (2016)