Fast and accurate simulation of the outdoor airflow distribution is important for studying urban microclimate. In this paper, two pressure-correction schemes (i.e., NIPC NSPF) solving N-S equation item by are implemented in OpenFOAM their differences from PISO algorithm simulating around a single 1:1:2 bluff body analyzed. The RNG k-ε turbulence model chosen to study disturbance, while second-o...