Abstract: With boundary element method^[1,2], this paperdeals with blood flow in the blood-vessel of lung. From the numerical simulation for the sheet fluid of SFH model and SFH model in the blood-vessel of lung, the velocity field of blood fluid, the distribution of surface force and pressure on the surface of the blood-vessel are given. The result shows that the stress suppressed on the skin cell of the lung blood-vessel is in the range from 0 to 4.48×10^-5N/cm². This is well consistent with Dewey's experimental result. Also the computational result shows that the formation of lung cell helps the breathing membrane supPOrt the smallest stress. Meanwhile, the method used in this paper provides an efficient approach to numerical analysis of the blood flow in the heart and blood vessel.

Key words: flow of blood, viscous boundary element method