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A PREDICTION OF THE ABNORMAL BEHAVIOR IN THE VISCOSITY OF LIQUID WATER UNDER PRESSURE
Chair, Tong Seek,Kim, Won Soo 한국화학공학회 1993 Korean Journal of Chemical Engineering Vol.10 No.2
A phenomenological theory of viscosity proposed by authors was applied to Liquid water under high pressure. Thermodynamic properties used in the calculation were obtained by using the theory of liquid proposed by Pak [13]. The calculated viscosities decreased abnormally with increasing pressure. We found this behavior was due to the decrease of the absolute value of kinetic and internal pressure with the pressure increase near 273.15 K.
A Prediction of the Abnormal Behavior in the Viscosity of Liquid Water under Pressure
Chair, Tong Seek,Kim, Won Soo 한국화학공학회 1993 NICE Vol.11 No.6
A phenomenological theory of viscosity proposed by authors was applied to Liquid water under high pressure. Thermodynamic properties used in the calculation were obtained by using the theory of liquid proposed by Pak [13]. The calculated viscosities, decreased abnormally with increasing pressure. We a found this behavior was due to the decrease of the absolute value of kinetic and internal pressure with the pressure increase near 273.15K.
최동식 ( Tong Seek Chair ) 한국화학공학회 1979 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.17 No.1
The characteristics of complicated modern society may be treated similar to those of liquids, and the treatment might promise a new paradigm for a better world, which is called social thermodynamics. Introducing so called Roulette liquid model, the general system theory and thermodynamics will be reviewed briefly. With the concepts of simple types of structure units, the complicated society could be analyzed and explained quite successfully to support Dr. Field`s comparative political theory. In conclusion, it seems significant that scientific concepts as well as scientific approach are applied to solve the interdisciplinary problems, especially to the topics in social sciences.
A Calculation for the Viscosity of Fluid at the Critical Point
Kim, Won-Soo,Chair, Tong-Seek Korean Chemical Society 2002 Bulletin of the Korean Chemical Society Vol.23 No.11
It is very difficult to measure the fluid viscosity at the critical point, there are seldom found experimental values of fluid viscosity at the critical point. Few theories can explain the critical viscosity quantitatively. A theory of viscosity previously proposed by authors10 is applied to the fluid at the critical point. This theory can be simplified as a simple form with no adjustable parameters, allowing for easy calculation. Viscosities at the critical point for some substances have been calculated, and calculated results are satisfactory when compared with the observed values.
A Calculation for the Viscosity of Fluids by Using Van Der Waals Equation of State
Jhon, Mu Shik,Chair, Tong Seek,Pak, Hyung Suk,Kim, Won Soo 한국화학공학회 1989 NICE Vol.7 No.3
A new equation for the viscosity of fluid is presented by considering that the viscosity is equal to the product of the shear pressure and the shear relaxation time. The shear pressure and the shear relaxation time are calculated thermodynamically by applying the van der Waals model for fluids. The calculated viscosities for various simple substances are in good agreements with those of the observed values through liquid-critical point-gas region.
A Paradigm for the Viscosity of Fluids
Kim, Won-Soo,Chair, Tong-Seek,Pak, Hyung-Suk Korean Chemical Society 1988 Bulletin of the Korean Chemical Society Vol.9 No.4
A new paradigm for the viscosity of fluid is presented by considering the fact that the viscosity is equal to the shear stress divided by the shear rate. The shear stress is obtained from the sum of kinetic and internal pressures of fluid, and the shear rate is found from the phonon velocity divided by the mean free path of the phonon. The calculated viscosities for various simple substances are in excellent agreements with those of the observed data through the wide temperature range covered both of liquid and gas phase.