Possible Limitations of the Particle Image Velocimetry Method in the Presence of Strong Electric Fields

Michal Malík,Jiří Primas,Josef Novák,Filip Sanetrník,Pavel Pokorný,Petr Schovanec

doi:10.3390/pr9101790

Michal Malík, Jiří Primas + Show 4 more

Open Access

https://doi.org/10.3390/pr9101790

Copy DOI

Journal: Processes	Publication Date: Oct 9, 2021
Citations: 1	License type: CC BY 4.0

Affiliation: Technical University of Liberec

Abstract

While examining the airflow generated between the asymmetrical electrodes connected to high voltage, the authors investigated the possible limitations of the particle image velocimetry (PIV) method in the presence of strong electric fields. The tracer particles used in the PIV method in these conditions are affected by electromagnetic forces; therefore, it is necessary to determine whether these forces have any non-negligible negative influence on the measurement results. For this purpose, the authors theoretically analyzed all the possible forces and measured the generated airflow using PIV and constant temperature anemometry methods. The experimental and theoretical results clearly show the viability of the PIV measurement method even in these very specific conditions.

Highlights

Method in the Presence of StrongParticle image velocimetry (PIV) is a routinely used measuring method for the detailed study of flow fields in a wide variety of research fields, both in basic research [1,2] and practical applications [3,4]
The system of asymmetrical electrodes was connected to the voltage of 14 kV, and the generated airflow was examined using the particle image velocimetry (PIV) method
In the Introduction Section, the authors stated the question of whether the particles used for PIV measurements can be affected by the strong electric field present in the system of asymmetrical electrodes connected to high voltage

Summary

Introduction

Particle image velocimetry (PIV) is a routinely used measuring method for the detailed study of flow fields in a wide variety of research fields, both in basic research [1,2] and practical applications [3,4]. A very important scientific question arises considering the presence of strong electric fields around high voltage devices and their possible interference with the PIV measuring method. The fundamental condition of proper use of PIV is that the tracer particles accurately follow the actual, studied flow, which means that the dominant force affecting the particles is the drag force of the flowing media. There is an analogous situation, since the strong electric field presence always generates electromagnetic forces. The main scientific question of this presented article is to evaluate the viability of using PIV in these non-standard conditions

Methods

Results

Conclusion