Abstract：The fluid differential equations is theoretical basis for calculating the relative speed on S 2 flow surface in 3-D analyses. There exist two different formulations of this basic equation. The author of this paper analyzed the specifics and the difference between the terms in the two formulations, aiming at establishing a more exact base to develop calculating theories related to S 2 flow surface.
严敬. 对准三元理论S2流面求解的基本方程的分析[J]. 排灌机械工程学报, 2002, 20(5): 7-9.
YAN Jing. Analyses on Basic Equation of S_2 Flow Surface Calculating in 3-D Theories. Journal of Drainage and Irrigation Machinery Engin, 2002, 20(5): 7-9.
