水的粘度計算表

1、水的黏度表（0?40C）溫度T粘度PPa?或Nsm-2溫度T粘度Pa-s或N_-2-s-m2KcK0X10-3X10-31X10-321X10-32X10-322X10-33X10-323X10-34X10-324X10-35X10-325X10-36X10-326X10-37X10-327x10-38X10-328X10-39X10-329x10-310X10-330X10-311X10-331x10-312X10-332X10-313X10-333X10-314X10-334X10-315X10-335X10-316X10-336X10-317X10-337X10-318X10-338X1

2、0-319X10-339X10-320X10-340X10-3水的物理性質(zhì)溫度t/C飽和蒸氣壓p/kPa密度P/kg?m-3粉H/kJ?kg-1比定壓熱容Cp/kJ?kg-1?K-1導(dǎo)熱系數(shù)入/10-2W-m-1?K1粘度口/10-5Pa?s體積膨脹系數(shù)a/10-4八1表簡張力(T/10-3N?m-1普蘭德數(shù)Pr00102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360109370264F3Viscositydecreaseswithpressure(

3、attemperaturesbelow33C)Viscousflowoccursbymoleculesmovingthroughthevoidsthatexistbetweenthem.Asthe400”600X800i<1000kiooco5RdE-75QCPressure,MPaesWateu'sepFessetfs-vis瞧Vobmavioc盛溥£醐(behexpauifledobyrte§n/§rssisedpressure(udtKcebouctn50mMPly)icacreaisgndppoEmisuiironnswedusthgVsco

4、treyngthofthehydrogen-bondednetwork,whichisalsopartiallyresponsiblefortheviscosity.Thisreductionincohesivitymorethancompensatesforthereducedvoidvolume.ItisthusadirectconsequeneeofthebalaneebetweenhydrogenbondingeffectsandthevanderWaalsdispersionforces558inwater;hydrogenbondingprevailingatlowertemper

5、aturesandpressures.Athigherpressures(anddensities),thebalaneebetweenhydrogenbondingeffectsandthevanderWaalsdispersionforcesistippedinfavorofthedispersionforcesandtheremaininghydrogenbondsarestrongerduetothecloserproximityofthecontributingoxygenatoms655.Viscosity,then,increaseswithpressure.Thedashedline(opposite)indicatestheviscosityminima.Thevariationofviscositywithpressureandtemperaturehasbeenusedasevideneethattheviscosityisdeterminedmorebytheextentofhydrogenbondingratherthanhydrogenbondingstrength.Self-diffusionisalsoaffectedbypressurewhere(atlowtemperatu