内部编号：（YUUT-TBBY-MMUT-URRUY-UOOY-DBUYI-0128）水的粘度计算
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水的黏度表(0～40℃)温度T粘度μPa·s或N·s·m-2温度T粘度μPa·s或N·s·m-2℃K℃K0×10-3×10-31×10-321×10-32×10-322×10-33×10-323×10-34×10-324×10-35×10-325×10-36×10-326×10-37×10-327×10-38×10-328×10-39×10-329×10-310×10-330×10-311×10-331×10-312×10-332×10-313×10-333×10-314×10-334×10-315×10-335×10-316×10-336×10-317×10-337×10-318×10-338×10-319×10-339×10-320×10-340×10-3水的物理性质温度t/℃饱和蒸气压p/kPa密度ρ/kg·m-3焓H/kJ·kg-1比定压热容cp/kJ·kg-1·K-1导热系数λ/10-2W·m-1·K-1粘度μ/10-5Pa·s体积膨胀系数α/10-4K-1表面张力σ/10-3N·m-1普兰德数Pr00102030405060708090100110120130140150160170180190200210220230240250260270280290300310320330340350360109370264F3Viscositydecreaseswithpressure(attemperaturesbelow33°C)Viscousflowoccursbymoleculesmovingthroughthevoidsthatexistbetweenthem.Asthepressureincreases,thevolumedecreasesandthevolumeofthesevoidsreduces,sonormallyincreasingpressureincreasestheviscosity.Water'spressure-viscositybehavior[]canbeexplainedbytheincreasedpressure(uptoabout150MPa)causingdeformation,soreducingthestrengthofthehydrogen-bondednetwork,whichisalsopartiallyresponsiblefortheviscosity.Thisreductionincohesivitymorethancompensatesforthereducedvoidvolume.ItisthusadirectconsequenceofthebetweenhydrogenbondingeffectsandthevanderWaalsdispersionforces[]inwater;hydrogenbondingprevailingatlowertemperaturesandpressures.Athigherpressures(anddensities),thebetweenhydrogenbondingeffectsandthevanderWaalsdispersionforcesistippedinfavorofthedispersionforcesandtheremainingarestrongerduetothecloserproximityofthecontributingoxygenatoms[].Viscosity,then,increaseswithpressure.Thedashedline(opposite)indicatestheviscosityminima.Thevariationofviscositywithpressureandtemperaturehasbeenusedasevidencethattheviscosityisdeterminedmorebytheextentofhydrogenbondingratherthanhydrogenbondingstrength.Self-diffusionisalsoaffectedbypressurewhere(atlowtemperatures)boththetranslationalandrotationalmotionofwateranomalouslyincreaseasthepressureincreases.
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