Three-dimensional localized coherent structures of surface turbulence. III Experiment and model validation

TL;DR

This paper investigates 3D localized coherent structures on falling liquid film surfaces through experiments and numerical modeling, confirming theoretical predictions and exploring instabilities and structure characteristics.

Contribution

It provides experimental validation and detailed analysis of 3D coherent structures on falling liquid films, advancing understanding of their formation and behavior.

Findings

Experimental results agree with theoretical predictions

Identified instabilities leading to 3D structures

Characterized properties of localized coherent structures

Abstract

The paper continues a series of publications devoted to the 3D nonlinear localized coherent structures on the surface of vertically falling liquid films. The work is primarily focussed on experimental investigations. We study: (i) instabilities and transitions leading to 3D coherent structures; (ii) characteristics of these structures. Some nonstationary effects are also studied numerically. Our experimental results, as well as the results of other investigators, are in a good agreement with our theoretical and numerical predictions.