PHOENICS收敛

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1、ConvergenceMonitoringandControlConvergenceMonitoringandControlContents1.ConvergenceMonitoring1.1Residuals1.2RESREF1.3SpotValue2.HowtoAssessConvergence2.1Nettsource2.2Residuals2.3Spotvalues3.HowtouseGraphicalMonitor4.HowtoAchieveConvergence4.1LinearRelaxation4.2FalseTimeStepRelaxa

2、tion4.3AdviceonRelaxation4.4AutomaticRelaxation5.Otherrelaxationcontrol5.1SolverControls5.2LimitingValues5.3K-ELinearisation6.ConverttheresidualsobtainedwithSELREF=Ttoresidualsnormalisedbyreferenceinflowquantities.20————————————————————————————————————————————CHAM-上海办事处上海宜山路822号4

3、21室，邮编：200233，电话：021-64858842，email：phoenics@sh163.net，cham@phoenics.cnConvergenceMonitoringandControl1.ConvergenceMonitoring1.1ResidualsTheresidualsarethequantitiesusedinPHOENICStomonitortheconvergenceprocedure.ThesearetheimbalancesintheFVE,definedas:ep=ap(fp)-S(ai(fi-fp))-Sfi=W

4、,E,S,N,H,L,TwhereW,E,S,N,HandLdenotespacedirections;Tdenotestime-direction.Theaimofthecomputationistoreducethemtoanacceptablemagnitude.Duringthecomputation,theresidualsareprintedbyEarthtotheVDU,oraredisplayedgraphicallyasshowninFigure4.Thefrequencyofdisplayupdateiscontrolledbythe

5、PILvariableTSTSWP,whichissetintheVR-editorMainmenu/Output/Monitorupdatefrequencypanel.ThispanelalsodetermineswhetherthedataisshowngraphicallyorinASCII.Figure1showsthepanelwhentheMainmenu/outputisclickedinVR-Editor.“Monitordisplaymode”:GRAPHICSand“Monitorupdatefrequency”:1indicate

6、thatduringthecomputation,theresidualsaredisplayedgraphicallyonthescreenandupdatedeveryiteration.Themonitor-celllocationforthespotvaluesarealsosethere.PleasenotethatthemonitorupdatefrequencyisinternallycalculatedifLSWEEPislargeandtheuserisnotabletocontrolthefrequency.20———————————

7、—————————————————————————————————CHAM-上海办事处上海宜山路822号421室，邮编：200233，电话：021-64858842，email：phoenics@sh163.net，cham@phoenics.cnConvergenceMonitoringandControlFigure1.Mainmenu/OutputpanelinVR-EditorThePILsettinginaQ1fileshouldbe:TSTSWP=Nwherenistheupdatefrequency.N>0indicatesthatther

8、esidualsareprintedtotheVDUinASCII;N<0ind