About: Identification of relaxation parameter of a small latex tube

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://epilepsy.biomed.cas.cz/hb2012/HB2012_files/HB2012_abstracts.pdf
Description	This paper presents a fluid transient inflation experiment with a viscoelastic latex tube and its numerical simulation. Mathematical description of experimental setup (inflated tube, piping and pressurized vessel) is based on the windkessel model and on a nonlinear viscoelastic constitutive model of the inflated tube. The viscoelastic model is derived from the principle of maximized dissipated energy. Resulting system of ordinary differential equations is solved numerically by implicit Euler method. A thin wall latex tube of a small diameter (5mm) was tested first by a static inflation giving purely elastic part of the constitutive viscoelastic model. The following transient experiment (recording frequency and attenuation of pressure oscillations) enables to identify a relaxation parameter of the suggested viscoelastic model. Attenuation of the recorded pressure oscillation is caused by the tested sample viscoelasticity but also by fluid friction. To asses the influence of the (undesirable) fluid friction a series of simulations assuming a purely elastic response of the tube wall and an artificially increased fluid viscosity was carried out too. These results confirmed the hypothesis that the wall viscoelasticity plays an important role in damping of pressure pulsations within the tested specimen. This paper presents a fluid transient inflation experiment with a viscoelastic latex tube and its numerical simulation. Mathematical description of experimental setup (inflated tube, piping and pressurized vessel) is based on the windkessel model and on a nonlinear viscoelastic constitutive model of the inflated tube. The viscoelastic model is derived from the principle of maximized dissipated energy. Resulting system of ordinary differential equations is solved numerically by implicit Euler method. A thin wall latex tube of a small diameter (5mm) was tested first by a static inflation giving purely elastic part of the constitutive viscoelastic model. The following transient experiment (recording frequency and attenuation of pressure oscillations) enables to identify a relaxation parameter of the suggested viscoelastic model. Attenuation of the recorded pressure oscillation is caused by the tested sample viscoelasticity but also by fluid friction. To asses the influence of the (undesirable) fluid friction a series of simulations assuming a purely elastic response of the tube wall and an artificially increased fluid viscosity was carried out too. These results confirmed the hypothesis that the wall viscoelasticity plays an important role in damping of pressure pulsations within the tested specimen. (en)
Title	Identification of relaxation parameter of a small latex tube Identification of relaxation parameter of a small latex tube (en)
skos:prefLabel	Identification of relaxation parameter of a small latex tube Identification of relaxation parameter of a small latex tube (en)
skos:notation	RIV/68407700:21220/12:00199452!RIV13-MSM-21220___
http://linked.open...avai/predkladatel	Fakulta strojní
http://linked.open...avai/riv/aktivita	S Z
http://linked.open...avai/riv/aktivity	S, Z(MSM6840770012)
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Hromádka, David Žitný, Rudolf Chlup, Hynek
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta strojní
http://linked.open...dnocenehoVysledku	140329
http://linked.open...ai/riv/idVysledku	RIV/68407700:21220/12:00199452
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	fluid transient; viscoelasticity; pressure pulsation; maximum dissipation (en)
http://linked.open.../riv/klicoveSlovo	pressure pulsation viscoelasticity fluid transient maximum dissipation
http://linked.open...ontrolniKodProRIV	[C1C19C7E8D62]
http://linked.open...in/vavai/riv/obor	BO
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Chlup, Hynek Hromádka, David Žitný, Rudolf
http://linked.open...n/vavai/riv/zamer	Transdisciplinární výzkum v oblasti biomedicínského inženýrství II
http://localhost/t...ganizacniJednotka	21220

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