# Time-dependent numerical model for simulating internal oscillations in a sea organ

## TL;DR

This paper develops and validates a one-dimensional time-dependent numerical model to simulate the internal oscillations of a sea organ driven by irregular waves, capturing the effects of resonance and segment variation.

## Contribution

It introduces a coupled hydrodynamic-thermodynamic model for sea organ oscillations and validates it against experimental data, demonstrating its capability to simulate real-world behavior.

## Key findings

- Model accurately predicts internal oscillations and resonance effects.
- Oscillation response varies across segments and wave conditions.
- Strongest responses occur near resonance frequencies.

## Abstract

This paper presents a one-dimensional time-dependent numerical model of a sea organ, which generates music driven by the motion of the sea. The governing equations are derived by coupling hydrodynamic and thermodynamic equations for water level and air pressure oscillations in a sea organ pipe system forced by irregular waves. The model was validated by comparing numerical results to experimental data obtained from a scaled physical model. Furthermore, the models' capabilities are presented by simulating internal oscillations in the Sea Organ in Zadar, Croatia. The response of the Sea Organ varies between segments and for different wave conditions. The strongest air pressure and water level response is found near resonance frequencies.