水的粘度计算表

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1、水的黏度表（040C）10-310-317290.161.08281.0828 X10-337310.160.69470.6947 X10-318291.161.05591.0559 X10-338311.160.68140.6814 X10-319292.161.02991.0299 X10-339312.160.66850.6685 X10-320293.161.00501.0050 X10-340313.160.65600.6560 X10-3水的物理性质温度t/c饱和蒸气压 p/kPa密度P/kg m-3焓H/kJ kg-1比定压热容cP/kJ kg-1 K-1导热系数入/10-2W

2、m-1 K-1粘度p/10-5Pa s体积膨胀系数a/10 -4K -1表面张力。/10-3N m-1普兰德数Pr00.6082999.904.21255.13179.210.6375.613.66101.2262999.742.044.19757.45130.770.7074.19.52202.3346998.283.904.18359.89100.501.8272.67.01304.2474995.7125.694.17461.7680.073.2171.25.42407.3766992.2165.714.17463.3865.603.8769.64.325012.31988.1209.3

3、04.17464.7854.944.4967.73.546019.932983.2251.124.17865.9446.885.1166.22.987031.164977.8292.994.17866.7640.615.7064.32.548047.379971.8334.944.19567.4535.656.3262.62.229070.136965.3376.984.20867.9831.656.9560.71.96100101.33958.4419.104.22068.0428.387.5258.81.76110143.31951.0461.344.23868.2725.898.0856

4、.91.61120198.64943.1503.674.25068.5023.738.6454.81.47130270.25934.8546.384.26668.5021.779.1752.81.36140361.47926.1589.084.28768.2720.109.7250.71.26150476.24917.0632.204.31268.3818.6310.348.61.18160618.28907.4675.334.34668.2717.3610.746.61.11170792.59897.3719.294.37967.9216.2811.345.31.051801003.5886

5、.9763.254.41767.4515.3011.942.31.001901255.6876.0807.634.46066.9914.4212.640.80.962001554.77863.0852.434.50566.2913.6313.338.40.932101917.72852.8897.654.55565.4813.0414.136.10.912202320.88840.3943.704.61464.5512.4614.833.80.892302798.59827.3990.184.68163.7311.9715.931.60.882403347.91813.61037.494.75

6、662.8011.4716.829.10.872503977.67799.01085.644.84461.7610.9818.126.70.862604693.75784.01135.044.94960.8410.5919.724.20.872705503.99767.91185.285.07059.9610.2021.621.90.882806417.24750.71236.285.22957.459.8123.719.50.892907443.29732.31289.955.48555.829.4226.217.20.933008592.94712.51344.805.73653.969.

7、1229.214.70.973109877.96691.11402.166.07152.348.8332.912.31.0232011300.3667.11462.036.57350.598.5338.210.01.1133012879.6640.21526.197.24348.738.1443.37.821.2234014615.9610.11594.758.16445.717.7553.45.781.3835016538.5574.41671.379.50443.037.2666.83.891.6036018667.1528.01761.3913.98439.546.671092.062.

8、3637021040.9450.51892.4340.31933.735.692640.486.8030qCF3 Viscosity decreases with pressure(at temperatures below 33 C)0 & *200 殳40tf* 1 600 V 8001000Mf， ,: Pressure, MPa 匚*/，Viscous flow occurs by molecules moving through the voids that exist betweenthem. As the pressure increases, the volume decrea

9、ses and the volume ofthese voids reduces, so normally increasing pressure increases the viscosity.20C2575CWaters pressure-viscosity behavior 534 can be explained by the increased pressure (up to about 150 MPa) causing deformation, so reducing the strength of the hydrogen-bonded network, which is als

10、o partially responsible for the viscosity. This reduction in cohesivity more than compensates for the reduced void volume. It is thus a direct consequence of the balance between hydrogen bonding effects and the van der Waals dispersion forces 558 in water; hydrogen bonding prevailing at lower temper

11、atures and pressures. At higher pressures (and densities), the balance between hydrogen bonding effects and the van der Waals dispersion forces is tipped in favor of the dispersion forces and the remaining hydrogen bonds are stronger due to the closer proximity of the contributing oxygen atoms 655.

12、Viscosity, then, increases with pressure. The dashed line (opposite) indicates the viscosity minima.一904地0)2卷0)The variation of viscosity with pressure and temperature has been used as evidence that the viscosity is determined more by the extent of hydrogen bonding rather than hydrogen bonding strength.Self-diffusion is also affected by pressure where (at low temperatures) both the translational and rotational motion of water anomalously increase as the pressure increases.Welcome ToDownload !欢迎您的下载，资料仅供参考！