An energy flux conserving one-way coupled mode propagation model

TL;DR

This paper introduces an analytic one-way coupled mode propagation model that conserves acoustic energy flux and is validated through test calculations, offering a precise tool for resonant mode interactions.

Contribution

The paper develops a novel analytic model for one-way coupled mode propagation that conserves energy flux, validated by numerical tests.

Findings

Energy flux is conserved in the model up to first order.

Test calculations show excellent agreement with the model.

The model effectively describes resonant interacting modes.

Abstract

A pure analytic one-way coupled mode propagation model for resonant interacting modes is obtained by the multiscale expansion method. It is proved that the acoustic energy flux is conserved in this model up to the first degree of the corresponding small parameter. The test calculations with the COUPLE program give an excellent agreement.