引用本文:
陈立班, 杨淑英. 比密粘度和特性粘数的计算及改正[J]. 物理化学学报,
1991, 7(05): 524-530.
doi:
10.3866/PKU.WHXB19910503
Citation: Chen Li-Ban, Yang Shu-Ying. Calculation and Corrections of Kinematic Viscosity and Intrinsic Viscosity[J]. Acta Physico-Chimica Sinica, 1991, 7(05): 524-530. doi: 10.3866/PKU.WHXB19910503
Citation: Chen Li-Ban, Yang Shu-Ying. Calculation and Corrections of Kinematic Viscosity and Intrinsic Viscosity[J]. Acta Physico-Chimica Sinica, 1991, 7(05): 524-530. doi: 10.3866/PKU.WHXB19910503
比密粘度和特性粘数的计算及改正
摘要:
本文导出毛细管粘度计的比密粘度方程:
v=η/ρ=At-Bt~(-1)+C
式中-Bt~(-1)和C分别代表动能改正和残液改正。方程在宽的粘度范围内有良好精度。
本文提出,准确的特性粘数[η]与忽略任何改正的特性粘数[η]~*之间存在简单的线性关系。例如从以上方程可写出
[η]=(1+k_e-k_v)[η]~*+δρ
式中k_e=2Bt_o~(-1)/At_0+Bt_0~(-1)+C), k_v=C/(At_0-Bt_0~(-1)+C), δρ=(ρ_1-ρ_0)/(c_1ρ_0), 它们分别是代表动能改正、残液改正和密度改正的常数。利用以上特性粘数改正公式, 可在确保准确性的前提下极大地简化特性粘数的改正计算。
v=η/ρ=At-Bt~(-1)+C
式中-Bt~(-1)和C分别代表动能改正和残液改正。方程在宽的粘度范围内有良好精度。
本文提出,准确的特性粘数[η]与忽略任何改正的特性粘数[η]~*之间存在简单的线性关系。例如从以上方程可写出
[η]=(1+k_e-k_v)[η]~*+δρ
式中k_e=2Bt_o~(-1)/At_0+Bt_0~(-1)+C), k_v=C/(At_0-Bt_0~(-1)+C), δρ=(ρ_1-ρ_0)/(c_1ρ_0), 它们分别是代表动能改正、残液改正和密度改正的常数。利用以上特性粘数改正公式, 可在确保准确性的前提下极大地简化特性粘数的改正计算。
English
Calculation and Corrections of Kinematic Viscosity and Intrinsic Viscosity
Abstract:
A kinematic viscosity equation is suggested for capillary viscometers. The equation shows od accuracy in a wide range of viscosity as well as the Reynolds number:
v=η/ρ=At-Bt~(-1)+C
where v is the kinematic viscosity, t is the efflux time, and A,B,C are instrumental constants. The terms of -Bt~(-1) and C are corres ρ onding to the kinetic energy correction and the drainage correction respectively.
In order to simplify the calculation, a linear [η]～[η]~* correlation has been found, where [η] and [η]~* denote the accurate and the approximate (based on ...
v=η/ρ=At-Bt~(-1)+C
where v is the kinematic viscosity, t is the efflux time, and A,B,C are instrumental constants. The terms of -Bt~(-1) and C are corres ρ onding to the kinetic energy correction and the drainage correction respectively.
In order to simplify the calculation, a linear [η]～[η]~* correlation has been found, where [η] and [η]~* denote the accurate and the approximate (based on ...
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