Mutual Interaction of Serially Arranged Stenoses at Low Reynolds Numbers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00352970" target="_blank" >RIV/68407700:21220/21:00352970 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Mutual Interaction of Serially Arranged Stenoses at Low Reynolds Numbers

Popis výsledku v původním jazyce

This study is focused on measurement of velocity fields by the planar PIV experimental method. Velocity fields are measured within rigid blood vessel models with stenoses of different distances between each other. Stenoses of two different geometries, a symmetric and an asymmetric, though with the same 75% area reduction, are used. The vessel models are made of transparent silicone elastomer with low refractive index using external PMMA casting box with a 3D printed inner negative mould made of water soluble PVA material. Optical distortion on the curved inner wall of the vessel model is eliminated using a working fluid which has the refractive index of the same value as the model does. In order to match the refractive indices to each other, a water-glycerol solution mixed at an appropriate ratio was used as the working fluid. For simplicity of the experimental setup, a continuous laser diode was used as light source. Velocity fields were measured within five vessel models with stenoses: one model with a single symmetric stenosis, two models with double symmetric stenoses at different distances, and two models with a combination of symmetric and asymmetric stenosis at different distances. For each model, three steady flow regimes were measured with volume flow rates of 9, 13.5, and 18 ml/s, corresponding to Reynolds numbers of 83, 124, and 165 respectively.

Název v anglickém jazyce

Mutual Interaction of Serially Arranged Stenoses at Low Reynolds Numbers

Popis výsledku anglicky

This study is focused on measurement of velocity fields by the planar PIV experimental method. Velocity fields are measured within rigid blood vessel models with stenoses of different distances between each other. Stenoses of two different geometries, a symmetric and an asymmetric, though with the same 75% area reduction, are used. The vessel models are made of transparent silicone elastomer with low refractive index using external PMMA casting box with a 3D printed inner negative mould made of water soluble PVA material. Optical distortion on the curved inner wall of the vessel model is eliminated using a working fluid which has the refractive index of the same value as the model does. In order to match the refractive indices to each other, a water-glycerol solution mixed at an appropriate ratio was used as the working fluid. For simplicity of the experimental setup, a continuous laser diode was used as light source. Velocity fields were measured within five vessel models with stenoses: one model with a single symmetric stenosis, two models with double symmetric stenoses at different distances, and two models with a combination of symmetric and asymmetric stenosis at different distances. For each model, three steady flow regimes were measured with volume flow rates of 9, 13.5, and 18 ml/s, corresponding to Reynolds numbers of 83, 124, and 165 respectively.

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

Proceedings of Abstracts 39th Meeting of Departments of Fluid Mechanics and Thermodynamic

ISBN

978-80-248-4557-9

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

VŠB - Technical University of Ostrava

Místo vydání

Ostrava

Místo konání akce

Hotel Duo, Horní Bečva

Datum konání akce

13. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—