Studium vlivu změny teploty nenewtonské kapaliny na charakter proudění v karotické bifurkaci s aneurysmatem
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Abstract
Proudění krve v anomální bifurkaci karotidy má souvislost se vznikem onemocnění
vedoucích k cerebrovaskulární nedostatečnosti. Na zvýšení rizika těchto onemocnění má vliv i změna hemodynamických parametrů, jako je například viskozita. Viskozita je veličina, která charakterizuje vnitřní tření kapaliny. Jedním z faktorů ovlivňující viskozitu krve je teplota, která ovlivní rychlost pohybu molekul a tím i charakter proudění v karotidě. Hlavním cílem diplomové práce bylo zjistit, jak velký vliv má změna teploty na viskozitu fantomové krve a charakter proudění v modelech karotické bifurkace s dvěma typy aneurysmatu. Bylo provedeno několik měření pomocí měřicí metody Particle Image Velocimetry. Experimentální výsledky jednoznačně prokázaly dopad teploty na hemodynamiku fantomové krve.
Blood flow in the anomalous carotid bifurcation is related to the development of the disease which leads to cerebrovascular insufficiency. A change in hemodynamic parameters, such as viscosity, also influences increasing the risk of these diseases. Viscosity is a quantity that characterizes the internal friction of a liquid. One of the factors that influences the viscosity of blood is temperature, which affects the speed of molecular movement and thereby the character of the flow in the carotid artery. The main goal of the diploma thesis was to find out how much influence has the change of the temperature on the viscosity of the phantom blood and the character of the flow in carotid bifurcation models with two types of aneurysms. Several measurements were using the Particle Image Velocimetry measurement method. The experimental results clearly demonstrated the impact of the temperature on the hemodynamics of the phantom blood.
Blood flow in the anomalous carotid bifurcation is related to the development of the disease which leads to cerebrovascular insufficiency. A change in hemodynamic parameters, such as viscosity, also influences increasing the risk of these diseases. Viscosity is a quantity that characterizes the internal friction of a liquid. One of the factors that influences the viscosity of blood is temperature, which affects the speed of molecular movement and thereby the character of the flow in the carotid artery. The main goal of the diploma thesis was to find out how much influence has the change of the temperature on the viscosity of the phantom blood and the character of the flow in carotid bifurcation models with two types of aneurysms. Several measurements were using the Particle Image Velocimetry measurement method. The experimental results clearly demonstrated the impact of the temperature on the hemodynamics of the phantom blood.
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karotická bifurkace, aneurysma, hemodynamika, viskozita, smykové napětí, teplota, fantom krve, Particle Image Velocimetry