The implicit finite-difference (IFD) acoustic model in a shallow water environment
Kosnik, Mark E.
Sanders, James V.
Dunlap. Calvin R.
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An implicit finite-difference (IFD ) computer model as developed by Jaeger to solve the parabolic equation. The model preserves continuity of pressure and the normal component of particle velocity at the ocean bottom where there is an interface between media with different sound speeds and densities. This feature was implemented to make the model more accurate in a shallow water environment. The lFD performance in a shallow water environment is analyzed. The IFD results are compared with these of two other models and analyzed in light of basic physical reasoning. In addition, a simple sloping ocean bottom is modeled in an experimental tank so that the measured pressure field can also be compared to IFD model results.
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