The most obvious one of advantages for IMM is that the Navier Stokes equations can be changed into one set of the Helmholtz equations with the pair of parameters of (k 1, k 2), the horizontal wavenumbers.

• 由此将Navier－Stokes方程转化为以水平波数（k1，k2）为参数的一组法向Helmholtz方程组，同时可更有效地求解压力。