Abstract: A numerical calculation was conducted to determine the axial and radial gradient of velocity/pressure with impinging submerged circular Jets perpendicularly. The effects of the factors were investigated, which include working fluid. nozzle-to-plate spacing. nozzle diameter and Reynolds number. The numerical results show that the radial distribution of local heat transfer coefficients are controlled by that of pressure gradient,and that the results are in good accordance with the experimental results.