Cartesianwinds演唱会
winds演唱会 时间:2021-01-14 阅读:()
CHAMWindSimUserMeeting2011DevelopmentsofPHOENICSasCFDengineforWindSimTomaszSTELMACHCHAMLtd,UKts@cham.
co.
ukWindSimAnnualUserMeeting16June2011CHAMWindSimUserMeeting2011Topicsofpresentation1.
CHAM-whoweare,whatwedo2.
PHOENICS3.
GCV-GENERALCOLOCATEDVELOCITYMETHOD4.
USP–unstructuredversionofPHOENICSCHAMWindSimUserMeeting2011CHAM-ConcentrationHeatAndMomentumCHAMisaworldleadingconsultancyandsoftwarehousespecialisingincomputersimulationoffluid-flow,fluid-structure-interactionandheat-transferFoundedbyProfessorBrianSpaldingin1974IndependentCFDcompanyrunbyitsfounderPHOENICSgeneralpurposepackageSpecialized,PHOENICSbased,standaloneCFDprogramsCFDenginebehindWindSimCHAMWindSimUserMeeting2011CHAM-ConcentrationHeatAndMomentumSoftwaredevelopmentModel-buildingandappliedconsultancySoftwaresalesIntroductory/advancedtrainingcoursesTechnicalsupportCHAMWindSimUserMeeting2011PHOENICSAerospaceAutomotiveChemicalCombustionElectronicsCoolingMetallurgicalPowerGenerationTurbomachineryAtmosphericflowsCHAMWindSimUserMeeting2011PHOENICSNoteworthySpecialFeaturesRDI:RelationaldatainputallowsparameterizationofmodelscenariosIn-Form:Inputofdataviaformulaeremovestheneedforuserprogramming.
PARSOL:'cut-cell'techniquetofitcurvedbodiesinstructuredCartesiangridseliminatesgrid-generationproblem.
USP:UnstructuredgridsarecreatedautomaticallyParallelisation:domaindecompositionallowssimulationofverylargescenariosPRELUDE:providesuser-friendlyapplication-specificGatewaysDFW:DistancefromwallcalculatorusedinturbulenceandradiationmodelsPARAB:Parabolicmodesimplifiesflowsinducts,jetsandboundarylayersCHAMWindSimUserMeeting2011PHOENICSUsualfeaturesPlusalltheusualfeatures:1-,2-and3-DgeometriesCartesian,PolarandBFCConjugateHeatTransferMulti-Phase;ParticleTrackingChemicalreaction;RadiationTurbulenceCHAMWindSimUserMeeting2011PHOENICS–terrainrelatedsimulationsflowsinriversandadjacentfloodplains;flowoverandairpollutioninurbanlandscapes;thespreadofforestfires;airandsmokemovementinundergroundpassages;gas-releasesintotheatmosphereandconsequentexplosions;thermalandfluid-flowinteractionsbetweenadjacentequipmentitemsinchemical-industryscenariosCHAMWindSimUserMeeting2011PHOENICS–standaloneprogramsVirtualWindtunnelFLAIRTerrainShellandTubeHeatExchangersGasreleaseCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTheGCV-alternativealgorithmforsolvingtheN-SequationsinBFCgeometries.
ThemainfeaturesoftheGCVmethodare:Ablock-structuredmulti-blockimplementation,withacapabilitytotacklehighlynon-orthogonalgrids.
Convergencecanbeobtainedwithincludedanglesassmallas10degrees.
Asliding-gridoptionenablesthesimulationofproblemswhereacomputationalgridisdividedintotwoparts,namelyapartwhichrotatesaroundtheZaxisandapartwhichisatrest.
Themethodusesasegregatedpressure-basedsolverstrategywithanadditionalcorrectionofcell-centremomentumvelocitycomponents,whichconvergesfasterincomparisonwiththestandardone-stepfacevelocitycorrection.
Thesolverworksinablock-by-blockmanner,buttakesthelinksbetweenblocksintoaccountimplicitly,thusprovidingfastconvergence.
CHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODKeybenefits:Fasterconvergence,Shortercomputationaltime,Betterconvergence(results)withcomplexterraincases.
CHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODComparisonwithstandardmethodSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODComputationaltime:10minSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexamplesusingwithGCV=TConclusionsObtainconvergencewithcaseswhichbeforeitwasverydifficultorevenimpossible,Lowercomputationaltime,Only~3%increaseofmemoryrequirements,Morereliableresults.
CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPisapartofthestandardPHOENICSpackage,whichcanthereforeworkingstructuredorunstructuredmodesatuser'schoice.
AllUSPgridsconsistofCartesian(i.
e.
)brick-shapedcells.
USPmeshcanbegeneratedautomaticallyviaspecialutilitycalledAutomaticGridGenerator(AGG)CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSAdvantagesofusingUSPgridsinflowoverterrainsmodelling:Highquality(density)numericalgridisrequiredonlyintheneargroundlayerForgivenfinenessneartheground,USPusesfewercellsthanSP.
Forthesamenumberofcells,USP'sgridisfinernearthegroundCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSExampleofUSPgridCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCOMPARISONSPandUSPSPUSPCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCOMPARISONSPandUSPSPUSPUSPcaseconverged6timesfaster.
CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPterraincaseexample:CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPexample-resultsContoursofvelocityContoursofpressureCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPexample–convergenceplotConvergejustafter774iterationsComputationaltime:aprox.
–7minCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCONCLUSIONSConclusions:ReducedcomputationtimeandmemoryrequirementsResultsareverysimilartostandardgirdcasesUsefulforterrainsimulationproblemsCHAMWindSimUserMeeting2011PHOENICS–nearfutureR&DFurtherdevelopmentandvalidationofUSPandGCVsolversPARSOL–optimizingforUPSsolverOptimizationforterraincasesIntroducingparallelprocessingforUSPandGCVCHAMWindSimUserMeeting2011PHOENICSThankyouforattentions!
Questions
co.
ukWindSimAnnualUserMeeting16June2011CHAMWindSimUserMeeting2011Topicsofpresentation1.
CHAM-whoweare,whatwedo2.
PHOENICS3.
GCV-GENERALCOLOCATEDVELOCITYMETHOD4.
USP–unstructuredversionofPHOENICSCHAMWindSimUserMeeting2011CHAM-ConcentrationHeatAndMomentumCHAMisaworldleadingconsultancyandsoftwarehousespecialisingincomputersimulationoffluid-flow,fluid-structure-interactionandheat-transferFoundedbyProfessorBrianSpaldingin1974IndependentCFDcompanyrunbyitsfounderPHOENICSgeneralpurposepackageSpecialized,PHOENICSbased,standaloneCFDprogramsCFDenginebehindWindSimCHAMWindSimUserMeeting2011CHAM-ConcentrationHeatAndMomentumSoftwaredevelopmentModel-buildingandappliedconsultancySoftwaresalesIntroductory/advancedtrainingcoursesTechnicalsupportCHAMWindSimUserMeeting2011PHOENICSAerospaceAutomotiveChemicalCombustionElectronicsCoolingMetallurgicalPowerGenerationTurbomachineryAtmosphericflowsCHAMWindSimUserMeeting2011PHOENICSNoteworthySpecialFeaturesRDI:RelationaldatainputallowsparameterizationofmodelscenariosIn-Form:Inputofdataviaformulaeremovestheneedforuserprogramming.
PARSOL:'cut-cell'techniquetofitcurvedbodiesinstructuredCartesiangridseliminatesgrid-generationproblem.
USP:UnstructuredgridsarecreatedautomaticallyParallelisation:domaindecompositionallowssimulationofverylargescenariosPRELUDE:providesuser-friendlyapplication-specificGatewaysDFW:DistancefromwallcalculatorusedinturbulenceandradiationmodelsPARAB:Parabolicmodesimplifiesflowsinducts,jetsandboundarylayersCHAMWindSimUserMeeting2011PHOENICSUsualfeaturesPlusalltheusualfeatures:1-,2-and3-DgeometriesCartesian,PolarandBFCConjugateHeatTransferMulti-Phase;ParticleTrackingChemicalreaction;RadiationTurbulenceCHAMWindSimUserMeeting2011PHOENICS–terrainrelatedsimulationsflowsinriversandadjacentfloodplains;flowoverandairpollutioninurbanlandscapes;thespreadofforestfires;airandsmokemovementinundergroundpassages;gas-releasesintotheatmosphereandconsequentexplosions;thermalandfluid-flowinteractionsbetweenadjacentequipmentitemsinchemical-industryscenariosCHAMWindSimUserMeeting2011PHOENICS–standaloneprogramsVirtualWindtunnelFLAIRTerrainShellandTubeHeatExchangersGasreleaseCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTheGCV-alternativealgorithmforsolvingtheN-SequationsinBFCgeometries.
ThemainfeaturesoftheGCVmethodare:Ablock-structuredmulti-blockimplementation,withacapabilitytotacklehighlynon-orthogonalgrids.
Convergencecanbeobtainedwithincludedanglesassmallas10degrees.
Asliding-gridoptionenablesthesimulationofproblemswhereacomputationalgridisdividedintotwoparts,namelyapartwhichrotatesaroundtheZaxisandapartwhichisatrest.
Themethodusesasegregatedpressure-basedsolverstrategywithanadditionalcorrectionofcell-centremomentumvelocitycomponents,whichconvergesfasterincomparisonwiththestandardone-stepfacevelocitycorrection.
Thesolverworksinablock-by-blockmanner,buttakesthelinksbetweenblocksintoaccountimplicitly,thusprovidingfastconvergence.
CHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODKeybenefits:Fasterconvergence,Shortercomputationaltime,Betterconvergence(results)withcomplexterraincases.
CHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODComparisonwithstandardmethodSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODComputationaltime:10minSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexampleusingwithGCV=TSTANDARDGCVCHAMWindSimUserMeeting2011GCV-GENERALCOLOCATEDVELOCITYMETHODTerrainsimulationexamplesusingwithGCV=TConclusionsObtainconvergencewithcaseswhichbeforeitwasverydifficultorevenimpossible,Lowercomputationaltime,Only~3%increaseofmemoryrequirements,Morereliableresults.
CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPisapartofthestandardPHOENICSpackage,whichcanthereforeworkingstructuredorunstructuredmodesatuser'schoice.
AllUSPgridsconsistofCartesian(i.
e.
)brick-shapedcells.
USPmeshcanbegeneratedautomaticallyviaspecialutilitycalledAutomaticGridGenerator(AGG)CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSAdvantagesofusingUSPgridsinflowoverterrainsmodelling:Highquality(density)numericalgridisrequiredonlyintheneargroundlayerForgivenfinenessneartheground,USPusesfewercellsthanSP.
Forthesamenumberofcells,USP'sgridisfinernearthegroundCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSExampleofUSPgridCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCOMPARISONSPandUSPSPUSPCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCOMPARISONSPandUSPSPUSPUSPcaseconverged6timesfaster.
CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPterraincaseexample:CHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPexample-resultsContoursofvelocityContoursofpressureCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSUSPexample–convergenceplotConvergejustafter774iterationsComputationaltime:aprox.
–7minCHAMWindSimUserMeeting2011USP–UNSTRUCTUREDPHOENICSCONCLUSIONSConclusions:ReducedcomputationtimeandmemoryrequirementsResultsareverysimilartostandardgirdcasesUsefulforterrainsimulationproblemsCHAMWindSimUserMeeting2011PHOENICS–nearfutureR&DFurtherdevelopmentandvalidationofUSPandGCVsolversPARSOL–optimizingforUPSsolverOptimizationforterraincasesIntroducingparallelprocessingforUSPandGCVCHAMWindSimUserMeeting2011PHOENICSThankyouforattentions!
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