A block coupled solver development for hydraulic machinery applications

In this paper, a fully coupled block algorithm for the solution of three-dimensional incompressible turbulent flows for use in hydraulic machinery is presented. Due to the simultaneous solution of momentum and continuity equations, implicit block coupling of pressure and velocity variables leads to faster convergence in respect to classical, loosely coupled, segregated algorithms of the SIMPLE family of algorithms. Special linear solver developments were also performed in order to extend the new fully coupled solver to high efficiency HPC simulations. These modifications allow the coupled solver to retain its improved performance and robustness in addition to mesh size scalability while solving hydraulic machinery type applications.