动力粘度、运动粘度及恩氏粘度之间的单位换算

  仪器信息网 ·  2012-09-23 08:19  ·  60658 次点击
动力粘度、运动粘度及恩氏粘度之间的单位换算:
动力粘度η:在流体中取两面积各为1m2,相距1m,相对移动速度为1m/s时所产生的阻力称为动力粘度。
1厘泊(1cP)=1毫帕斯卡.秒(1mPa.s)
100厘泊(100cP)=1泊(1P)
1000毫帕斯卡.秒(1000mPa.s)=1帕斯卡.秒(1Pa.s)
动力粘度u:流体的动力粘度η与同温度下该流体的密度ρ的比值称为运动粘度。它是这种流体在重力作用下流动阻力的度量。
与运动粘度的换算:
η=ν.ρ
式中η---试样动力粘度(mPa.s)
ν---试样运动粘度(mm2/s)
ρ---与测量运动粘度相同温度下试样的密度(g/cm3)
恩氏粘度:条件粘度的一种,恩氏粘度,又称恩氏度。符号为°E。在一定温度t下,从恩氏粘度计中流出200ml液体所需时间与20℃流出同体积蒸馏水所需时间之比,比值即为液体在温度t摄氏度下的逻辑布局氏粘度。恩氏粘度为相对粘度,为我国常用的相对粘度。
恩氏粘度与运动粘度的换算
ν/mm·s°Eν/mm·s°Eν/mm·s°Eν/mm·s°Eν/mm·s°E11172.55405.35729.5112015.81.51.0617.52.6415.48739.6412516.521.12182.65425.61749.7713017.22.51.1718.52.71435.74759.913517.831.22192.77445.87761014018.53.51.2619.52.834567710.1514519.141.31202.88466.137810.315019.84.51.3520.52.94476.267910.4515520.551.39213486.388010.616021.15.51.4421.53.06496.518110.716521.861.48223.11506.648210.817022.46.51.5222.53.17516.778310.9517523.171.56233.23526.98411.118023.87.51.6123.53.29537.038511.218524.481.65243.35547.178611.319025.18.51.7124.53.41557.38711.4519525.791.75253.47567.438811.620026.49.51.825.53.53577.568911.7520527101.84263.59587.699011.921027.710.51.88273.71597.82911221528.3111.94283.83607.959212.12202911.51.99293.96618.079312.2522529.6122.03304.08628.29412.423030.412.52.08314.21638.339512.5523530.9132.13324.33648.459612.724031.713.52.18334.46658.589712.824532.3142.23344.58668.729812.92503314.52.28354.71678.859913.0525533.6152.33364.84688.9810013.226034.215.52.38374.96699.1110513.926534.9162.44385.1709.2411014.527035.516.52.5395.22719.3711515.227536.2
对液体而言,压强越大,温度越低,粘度越大;压强越小,温度越高,粘度越小。
对气体而言,压强影响不大;温度越高,粘度越大,温度越低,粘度越小。

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