# Application of a Modified Harmony Search Algorithm in the Optimal Arrangement of a Novel Three Dimensional Multiphase Flow Imaging Device

## TL;DR

This paper introduces a novel 3D multiphase flow imaging device optimized using a modified harmony search algorithm, demonstrating high precision in cavitation bubble reconstruction within hydraulic systems.

## Contribution

It presents a new 3D flow imaging device and applies a modified harmony search algorithm for optimal arrangement, improving measurement accuracy in complex flow scenarios.

## Key findings

- The modified HS algorithm shows good optimization performance.
- The imaging device accurately reconstructs cavitation bubbles.
- Experimental results validate the method's effectiveness.

## Abstract

Gas-liquid two-phase flow is a typical flow, and bubble characteristic measurement is of great importance to study the flow mechanism and guide the practical fluid mechanical engineering. In this paper, a novel three dimensional (3D) multiphase flow imaging device was designed to measure the transparent object that has an opaque object in the center of the observed area. Its mathematical model was built and the constraints were defined based on the geometrical relationship and design requirements. A modified harmony search (HS) algorithm was integrated and applied to optimize the arrangement of the single-camera-multi-mirror device. As a case study, the 3D multiphase flow imaging method was applied in the the 3D reconstruction of the cavitation bubble cluster inside a water hydraulic valve. The statistics of the Pareto data shows the good performance of the modified HS algorithm. And the cavitation experimental results shows that the method is valid, and the cavitation bubble cluster can be reconstructed with quite high precision.