1990 年 38 巻 439 号 p. 449-451
In many papers for computational aerodynamics, we often find techniques which derive higher-order-accurate finite difference operators through modification of the corresponding lower-order ones. The following two are representative; a) to shift and superpose, b) to make fractional form. This paper presents a discussion concerning the questions; how these modifications should be made? and how these accuracy should be evaluated? These modifications make derivation of higher order operators substantially easier.