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1、水的黏度表(040)温度T粘度Pas或Nsm-2温度 T粘度Pas或Nsm-2KK0273.161.79211.792110-320.2293.361.00001.000010-31274.161.73131.731310-321294.160.98100.981010-32275.161.67281.672810-322295.160.95790.957910-33276.161.61911.619110-323296.160.93580.935810-34277.161.56741.567410-324297.160.91420.914210-35278.161.51881.518810-
2、325298.160.89370.893710-36279.161.47281.472810-326299.160.87370.873710-37280.161.42841.428410-327300.160.85450.854510-38281.161.38601.386010-328301.160.83600.836010-39282.161.34621.346210-329302.160.81800.818010-310283.161.30771.307710-330303.160.80070.800710-311284.161.27131.271310-331304.160.78400
3、.784010-312285.161.23631.236310-332305.160.76790.767910-313286.161.20281.202810-333306.160.75230.752310-314287.161.17091.170910-334307.160.73710.737110-315288.161.14041.140410-335308.160.72250.722510-316289.161.11111.111110-336309.160.70850.708510-317290.161.08281.082810-337310.160.69470.694710-3182
4、91.161.05591.055910-338311.160.68140.681410-319292.161.02991.029910-339312.160.66850.668510-320293.161.00501.005010-340313.160.65600.656010-3水的物理性质温度t/饱和蒸气压 p/kPa密度/kgm-3焓H/kJkg-1比定压热容cp/kJkg-1K-1导热系数/10-2Wm-1K-1粘度/10-5Pas体积膨胀系数/10-4K-1表面张力/10-3Nm-1普兰德数Pr00.6082999.904.21255.13179.210.6375.613.66101
5、.2262999.742.044.19757.45130.770.7074.19.52202.3346998.283.904.18359.89100.501.8272.67.01304.2474995.7125.694.17461.7680.073.2171.25.42407.3766992.2165.714.17463.3865.603.8769.64.325012.31988.1209.304.17464.7854.944.4967.73.546019.932983.2251.124.17865.9446.885.1166.22.987031.164977.8292.994.17866.7
6、640.615.7064.32.548047.379971.8334.944.19567.4535.656.3262.62.229070.136965.3376.984.20867.9831.656.9560.71.96100101.33958.4419.104.22068.0428.387.5258.81.76110143.31951.0461.344.23868.2725.898.0856.91.61120198.64943.1503.674.25068.5023.738.6454.81.47130270.25934.8546.384.26668.5021.779.1752.81.3614
7、0361.47926.1589.084.28768.2720.109.7250.71.26150476.24917.0632.204.31268.3818.6310.348.61.18160618.28907.4675.334.34668.2717.3610.746.61.11170792.59897.3719.294.37967.9216.2811.345.31.051801003.5886.9763.254.41767.4515.3011.942.31.001901255.6876.0807.634.46066.9914.4212.640.80.962001554.77863.0852.4
8、34.50566.2913.6313.338.40.932101917.72852.8897.654.55565.4813.0414.136.10.912202320.88840.3943.704.61464.5512.4614.833.80.892302798.59827.3990.184.68163.7311.9715.931.60.882403347.91813.61037.494.75662.8011.4716.829.10.872503977.67799.01085.644.84461.7610.9818.126.70.862604693.75784.01135.044.94960.
9、8410.5919.724.20.872705503.99767.91185.285.07059.9610.2021.621.90.882806417.24750.71236.285.22957.459.8123.719.50.892907443.29732.31289.955.48555.829.4226.217.20.933008592.94712.51344.805.73653.969.1229.214.70.973109877.96691.11402.166.07152.348.8332.912.31.0232011300.3667.11462.036.57350.598.5338.2
10、10.01.1133012879.6640.21526.197.24348.738.1443.37.821.2234014615.9610.11594.758.16445.717.7553.45.781.3835016538.5574.41671.379.50443.037.2666.83.891.6036018667.1528.01761.3913.98439.546.671092.062.3637021040.9450.51892.4340.31933.735.692640.486.80F3 Viscosity decreases with pressure (at temperature
11、s below 33C)Viscous flow occurs by molecules moving through the voids that exist between them. As the pressure increases, the volume decreases and the volume of these voids reduces, so normally increasing pressure increases the viscosity. Waters pressure-viscosity behavior 534 can be explained by th
12、e increased pressure (up to about 150 MPa) causing deformation, so reducing the strength of the hydrogen-bonded network, which is also 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 temperatures and pressures. At higher
