Article | REF: R2164 V1

Imaging techniques for fluid mechanics measurements

Authors: Sébastien CAZIN, Gilles GODARD, Fabrice LAMADIE, Pierre SLANGEN

Publication date: January 10, 2024

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Overview

Français

ABSTRACT

Imaging is a technique used in various fields related to fluid mechanics. It allows the measurement of geometric parameters such as size and shape, as well as scalar field variables like temperature, pH, and mixture.

This article provides an overview digital imaging and its application in fluid mechanics. It presents the main experimental setups used and their implementation. The aspects of signal processing and information management, crucial in this context, are also addressed. Finally, the article illustrates the potential of the technique through several examples of applications emphasizing coupling and ultra-fast imaging.

Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.

Read the article

AUTHORS

  • Sébastien CAZIN: CNRS Research Engineer - IMFT (UMR 5502: CNRS, Toulouse INP, Université UT3 Paul Sabatier), France

  • Gilles GODARD: CNRS Research Engineer - UMR 6614/CORIA, CNRS/INSA and University of Rouen, Saint-Étienne-du-Rouvray, France

  • Fabrice LAMADIE: CEA Research Director - CEA, DES, ISEC, DMRC, University of Montpellier, France

  • Pierre SLANGEN: Professor - EuroMov Digital Health in Motion, University of Montpellier, IMT Mines Ales, France

 INTRODUCTION

Over the centuries, mankind has observed flows through natural phenomena (clouds, smoke, algae...) and created various representations to try and understand their phenomenology. We all remember certain drawings and iconographies by Leonardo da Vinci or Giovanni Battista Venturi, which depict areas of turbulence, or the release of vortices using hand-drawn streamlines. These representations, initially highly qualitative, gradually gave way, over time and with technological progress, to more quantitative characterizations: velocity measurements, trajectographies, tracking of objects in flows, fluid-structure interactions, concentration and temperature measurements, etc., supported by imaging and visualization.

Today, flow characterization in fluid mechanics calls on a wide range of measurement techniques, enabling the exploration of numerous spatial and temporal scales. Among these, imaging-based techniques are undoubtedly among the most fundamental, and they have naturally enjoyed a boom due to their non-intrusive nature and their ability to observe flows at different scales.

Imaging, initially analog, gave way to digital imaging and computer-assisted image processing in the 1980s, bringing this technique into the realm of metrological techniques. The parallel emergence of lasers opened the door to the coupling of techniques and the non-intrusive measurement of increasingly complex flows, particularly multiphase flows. Today, the emergence of artificial intelligence methods, which are revolutionizing imaging and image processing, augurs an even richer future for this technique.

This article presents the state-of-the-art in imaging techniques for fluid mechanics measurement. It begins by describing the different types of experimental set-ups based on imaging, with a detailed description of the equipment encountered and a few reference examples. Next, the issue of signal processing leading to the extraction of quantitative physical information in flows is discussed. Finally, examples drawn from a number of recent research projects are presented for illustrative purposes.

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

KEYWORDS

imaging   |   signal processing   |   fluorescence   |   Fluid mechanics   |   shadowgraphy   |   scalar fields


This article is included in

Physical measurements

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Imaging techniques for fluid mechanics measurement