Spatial accuracy of small scale PIV measurement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13420%2F21%3A43896897" target="_blank" >RIV/44555601:13420/21:43896897 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/epjconf/202226901026" target="_blank" >http://dx.doi.org/10.1051/epjconf/202226901026</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/202226901026" target="_blank" >10.1051/epjconf/202226901026</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spatial accuracy of small scale PIV measurement

Popis výsledku v původním jazyce

The measurement of velocity fields by Particle Image Velocimetry is often limited by the scale of the model being measured. This is doubly true for the stereo Particle Image Velocimetry method. Measurement problems at small (but still macroscopic) scales are associated with optical distortions in the optical path of the camera due to the geometry of the model being measured. In addition, there is a calibration problem with stereo Particle Image Velocimetry. With small model sizes or complex model geometries, the implementation of a calibration target is difficult or even impossible. Therefore, this paper is devoted to the description of the Particle Image Velocimetry methodology for measurements at small geometric scales. In this paper, an idealized transparent model of hemodialysis vascular access was used. This model had realistic dimensions of the vascular access (6 mm diameter). A special blood-mimicking working fluid (BMF) with a refractive index corresponding to that of the model was mixed. The refraction and distortion of light passing through the interface between the model and the fluid were so small that it was possible to calibrate the stereo Particle Image Velocimetry outside the measured model. The accuracy of this calibration is discussed and verified by measuring the velocity field on a straight section of the vascular access model for laminar flow.

Název v anglickém jazyce

Spatial accuracy of small scale PIV measurement

Popis výsledku anglicky

The measurement of velocity fields by Particle Image Velocimetry is often limited by the scale of the model being measured. This is doubly true for the stereo Particle Image Velocimetry method. Measurement problems at small (but still macroscopic) scales are associated with optical distortions in the optical path of the camera due to the geometry of the model being measured. In addition, there is a calibration problem with stereo Particle Image Velocimetry. With small model sizes or complex model geometries, the implementation of a calibration target is difficult or even impossible. Therefore, this paper is devoted to the description of the Particle Image Velocimetry methodology for measurements at small geometric scales. In this paper, an idealized transparent model of hemodialysis vascular access was used. This model had realistic dimensions of the vascular access (6 mm diameter). A special blood-mimicking working fluid (BMF) with a refractive index corresponding to that of the model was mixed. The refraction and distortion of light passing through the interface between the model and the fluid were so small that it was possible to calibrate the stereo Particle Image Velocimetry outside the measured model. The accuracy of this calibration is discussed and verified by measuring the velocity field on a straight section of the vascular access model for laminar flow.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

EPJ Web of Conferences

ISBN

—

ISSN

2100-014X

e-ISSN

2100-014X

Počet stran výsledku

5

Strana od-do

"nestrankovano"

Název nakladatele

EDP Sciences

Místo vydání

Les Ulis

Místo konání akce

Horní Bečva

Datum konání akce

13. 10. 2021

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

—