资源描述：
《Benchmarks for Solving Coupled Thermal, Hydraulic, and Air (THA) Numerical Models in Roadways in Cold Regions》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、th15InternationalConferenceonColdRegionsEngineering,Quebec,Canada,August19-22,2012BenchmarksforSolvingCoupledThermal,Hydraulic,andAir(THA)NumericalModelsinRoadwaysinColdRegionsMurrayFredlund,JimZhangSoilVisionSystemsLtd,Saskatoon,SK,CanadaABSTRACT:Thecoldclimateenvironmentcancaused
2、amagetoengineeringstructuressuchasroadway/railwaysandpipelines.Therehasbeenanincreaseduseoffiniteelementnumericalmodelstostudyandunderstandtheprocessesinvolved.Theprimarydifficultyintheapplicationofsuchnumericalmodelsisthelackofpropercouplingbetweentherelatedprocessesofwater,therma
3、l,andairflow.Thispaperpresentsclassicbenchmarkssolvedwithafiniteelementnumericalmodelingcodewhichdemonstratesthecorrectcouplingofthethermal,hydraulic,andair(THA)processes.Theuseofthistechnologypotentiallyopenstheuseofnumericalmodelstoawiderrangeofapplicationsinarticregions.KEYWORDS
4、:soilfreezing/thawing,naturalconvection,air/water/heatcouplingflow,Elderproblem,numericalmodel,density-dependentflow,heattransfer.1INTRODUCTIONWiththeeconomicdevelopmentandeverincreasingdemandinenergyresources,engineeringactivityinPolarRegionsisincreasing.Thedesignofroadways,railwa
5、ys,andpipelinescanbeaffectedbythermalandwater/airflowprocessesandtheirinteractionwithpermafrost.Thecoldclimateenvironmentcancausedamagetoengineeringstructuressuchasroadway/railwaysandpipelines.Chenetal(2008)addressedmanyinnovativetechnologiesinordertoprotectthepermafrostroadbedinth
6、edesignoftheQinghai-TiebetRailway,forexample,usingnaturalconvectionofairorthermosyphonsetc.tocoolembankments.Naturalconvectionofairisacoupledprocessofairdensity-dependentflowandconvectiveheattransfer.Ontheotherhand,theprocessofoildensity-dependentflowandconvectiveheattransfercannot
7、beneglectedintheanalysisofoilleakpropagationinthesoil.Elder(1967)presentedasignificantexperimentandnumericalanalysisonthebuoyantprocesscreatedbyawatercaseheatedfrombelow.Therehassincebeenanincreaseduseoffiniteelementnumericalmodelstostudyandunderstandtheprocessesinvolved.Goringetal
8、(1999,2003),Jiangetal(2004
