Prediction of the Saturation Pressure of Water From Non-Equilibrium Measurements

2007 ◽  
Author(s):  
Fei Duan ◽  
C. A. Ward
Keyword(s):  
Vapor Phase ◽  
Saturation Pressure ◽  
Rate Theory ◽  
Statistical Rate Theory ◽  
Equilibrium Evaporation ◽  
Phase Temperature ◽  
Evaporation Flux ◽  
Saturation Vapor ◽  
Phase Pressure ◽  
Non Equilibrium

Statistical rate theory (SRT) was applied to predict the saturation pressure of H2O based on the measurements of interfacial liquid-phase temperature, interfacial vapor-phase temperature, vapor-phase pressure, and average evaporation flux in non-equilibrium evaporation experiments. It is found that the predicted saturation pressure agrees with the Smithsonian Tables and Table given in the Handbook of Chemistry and Physics for water, H2O. SRT provides a new efficient method to determine the saturation-vapor pressure from a non-equilibrium precess.

The Local Evaporation Flux Along the Interface of a Droplet

2009 ◽  
Author(s):  
Fei Duan
Keyword(s):  
Vapor Phase ◽  
Thermal Conduction ◽  
Thermocapillary Convection ◽  
Water Evaporation ◽  
Rate Theory ◽  
Statistical Rate Theory ◽  
Turbulent Transition ◽  
State Water ◽  
Evaporation Flux ◽  
Liquid And Vapor Phases

In steady-state water evaporation, the local evaporation flux is found uniform before the thermocapillary convection transition at the droplet. If the thermocapillary flow is present, the local evaporation flux becomes nonuniform as a result of effects of thermal conduction from liquid and vapor phases, thermocapillary convection at interface, or the viscous dissipation after the interfacial turbulent transition. The local vapor-phase pressures predicted from statistical rate theory become nonuniform after the thermocapillary convection transition. But, the average predicted pressure agrees with the measured vapor-phase pressure.

Sign in / Sign up

Export Citation Format

Share Document