Title of article
Spreadingundervariableviscosityandtime-dependentboundaryconditions:estimateofviscosityfromspreadingexperimentsOriginalResearchArticle
Author/Authors
J.J.Foit، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2004
Pages
15
From page
239
To page
253
Abstract
Oneofthecoolingconceptsofthehigh-temperaturecoriummeltwhichmayforminacoremeltdownaccidentreliesonsufficientlyhomogeneousspreading.Theconditionsunderwhichcompletespreadingcanbeexpectedaretheobjectsofcurrenttheoreticalandexperimentalstudies.
ThelubricationapproximationforlowReynoldsnumberflowsleadstoanequationforwhichself-similarsolutionsforvariousconditionshavebeenfoundbymanyauthors.Thispaperoffersself-similarsolutionsforthespreadingofavolumeofliquidwhichincreasesasapowerlawoftime.Theeffectofcoolingontheviscosityisrepresentedbythetime-dependentviscosity.Avarietyofspreadingexperimentshavebeenperformedwithinmanyinternationalprograms.Theinitialconditionsandboundaryconditionsusedaremorecomplexthanthoseforwhichself-similarsolutionsareknownexplicitly.Basedontheasymptoticbehavior,ast→∞,ofsolutionsoftheCauchyproblemforaquitegeneralclassofinitialdata,approximatesolutionsaregivendescribingthespreadingoffinitevolumewithatimedependentfluxrelease,andsomeofthehigh-temperatureexperimentsareanalyzed.Theeffectofbubblesonrheologyinspreadingexperimentswithwaterandshear-thinningfluidsisinvestigated.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2004
Journal title
Nuclear Engineering and Design Eslah
Record number
894655
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