Abstract: The block up coefficient technique is widely used to deal with irregular boundary shape due to its simple and highly accurate advantages.The present popular pressure velocity corrction algorithm and finite volume approach are proposed to numerically solve the complete Navier Stokes(N-S)equations.The applicability,feasibility and key techniques in the calculations of this method for irregular especially multiobstacle boundary shape are systematically discussed.Numerical results are satisfying.

Key words: pressure velocity correction algorithm, block up coefficient, correction techniques, three dimension viscous flow