Possible explanations of hysteresis at hydraulic characteristics in pipes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027022%3A_____%2F14%3A00000499" target="_blank" >RIV/00027022:_____/14:00000499 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Possible explanations of hysteresis at hydraulic characteristics in pipes

Popis výsledku v původním jazyce

Hysteresis observed at repeated loading/unloading cycles when measuring mechanical properties may be a manifestation of genuine material characteristics but it can be also an instrumentation artefact. This article was motivated by observed hysteresis ofa hydraulic characteristic in pumping a native polymeric material through a pipe at a gradually increasing and decreasing flowrate. The system was without recirculation and the same fresh liquid was pumped into the pipeline during increasing/decreasing phase, nevertheless the recorded pressure drop during the increasing phase was greater than the pressure at decreasing phase at the same flowrate. A possible explanation can be based upon the temperature dependent viscosity: during the flowrate ascendingphase the test pipe is filled by a colder liquid corresponding to previous less intensive viscous heating (therefore viscosity and pressure drop is greater then during the subsequent phase of decreasing flowrate). Another possibility is t

Název v anglickém jazyce

Possible explanations of hysteresis at hydraulic characteristics in pipes

Popis výsledku anglicky

Hysteresis observed at repeated loading/unloading cycles when measuring mechanical properties may be a manifestation of genuine material characteristics but it can be also an instrumentation artefact. This article was motivated by observed hysteresis ofa hydraulic characteristic in pumping a native polymeric material through a pipe at a gradually increasing and decreasing flowrate. The system was without recirculation and the same fresh liquid was pumped into the pipeline during increasing/decreasing phase, nevertheless the recorded pressure drop during the increasing phase was greater than the pressure at decreasing phase at the same flowrate. A possible explanation can be based upon the temperature dependent viscosity: during the flowrate ascendingphase the test pipe is filled by a colder liquid corresponding to previous less intensive viscous heating (therefore viscosity and pressure drop is greater then during the subsequent phase of decreasing flowrate). Another possibility is t

Druh

O - Ostatní výsledky

CEP obor

GM - Potravinářství

OECD FORD obor

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Projekt

<a href="/cs/project/GA14-23482S" target="_blank" >GA14-23482S: Tepelné, elektrické a reologické vlastnosti kolagenní hmoty</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

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