A comparative analysis of bubble point pressure prediction using advanced machine learning algorithms and classical correlations
49
Citation
42
Reference
10
Related Paper
Citation Trend
Keywords:
Bubble point
Perceptron
A new model of bubble dynamics is constructed in order to investigate single-bubble sonoluminescence (SBSL). In this model, the effects of non-equilibrium evaporation and condensation of water vapor at the bubble wall and of thermal conduction both inside and outside a bubble are taken into account. The most important point in the present study is in the numerical simulation of bubble oscillations that, for the first time in the studies of SBSL include the effects of non-equilibrium evaporation and condensation of water vapor at the bubble wall. The results reveal that this affects bubble dynamics considerably. For example, the vapor pressure at collapse is a few orders of magnitude larger than the saturated vapor pressure at ambient liquid temperature. The calculated results also reveal that the liquid temperature at the bubble wall increases considerably at the collapse due to thermal conduction from the heated interior of the bubble. This means that chemical reactions take place not only inside the bubble but also outside it. © 1998 Scripta Technica, Electron Comm Jpn Pt 2, 81(2): 39–45, 1998
Sonoluminescence
Bubble point
Cite
Citations (10)
A new model of bubble dynamics is constructed for the study of the recently discovered single-bubble sonoluminescence (SBSL). In the model, the effects of nonequilibrium evaporation and condensation at a bubble wall and that of thermal conduction both inside and outside a bubble are taken into account. Numerical calculations are performed under a condition of SBSL and that of non-light-emission. The most important point in this study is the calculation, including the effect of nonequilibrium evaporation and condensation at bubble wall for the first time in the studies of SBSL. The results reveal that the effect is considerable on bubble dynamics. It is clarified that the partial pressure of water vapor in a bubble differs considerably from the saturated vapor pressure at the collapse of the bubble. It is also clarified that the liquid temperature at the bubble wall increases considerably at collapse due to the thermal conduction and the latent heat of intense condensation. It means that chemical reactions take place not only inside a bubble but also outside a bubble. Rates of chemical reactions in a bubble are also numerically calculated including the effect. The results of this study are also important in the study of sonochemistry.
Sonoluminescence
Bubble point
Sonochemistry
Cite
Citations (20)
Bubble point
Oscillation (cell signaling)
Internal pressure
Cite
Citations (7)
In this paper on the basis of the classical bubble dynamics, the authors bring forward a new model for the bubble growth in a nucleation boiling system-the comprehensive interface model. The essence of the model is that the thermodynamic analysis for the status variation in a bubble is put into the first consideration. The heat and mass transfer on the interface of the bubble are considered in detail, especially in the circumstances of the boiling explosion. And some simulated calculations are carried out and the results are compared with experimental data. This model reveals the pressure and temperature variation in the process of bubble growing first time and provides a reasonable solution to numerically simulate the bubble growth or the development of vapor film. The temperature variation of the heating surface and the properties of the liquid govern the time length of the early bubble growing stage.
Bubble point
Liquid bubble
Cite
Citations (0)
A new model of bubble dynamics is constructed in order to investigate single-bubble sonoluminescence (SBSL). In this model, the effects of non-equilibrium evaporation and condensation of water vapor at the bubble wall and of thermal conduction both inside and outside a bubble are taken into account. The most important point in the present study is in the numerical simulation of bubble oscillations that, for the first time in the studies of SBSL include the effects of non-equilibrium evaporation and condensation of water vapor at the bubble wall. The results reveal that this affects bubble dynamics considerably. For example, the vapor pressure at collapse is a few orders of magnitude larger than the saturated vapor pressure at ambient liquid temperature. The calculated results also reveal that the liquid temperature at the bubble wall increases considerably at the collapse due to thermal conduction from the heated interior of the bubble. This means that chemical reactions take place not only inside the bubble but also outside it. © 1998 Scripta Technica, Electron Comm Jpn Pt 2, 81(2): 39–45, 1998
Sonoluminescence
Bubble point
Cite
Citations (1)
Abstract This paper presents the results of a study on the factors affecting well deliverability in volatile oil reservoirs producing at flowing bottomhole pressure below bubble point pressure and methods of mitigating well productivity decline due to "gas blockage" when volatile oil reservoirs are producing at flowing bottomhole pressure below bubble point pressure. For this purpose, actual well producing at flowing bottomhole pressure below bubble point pressure was modelled using a one-dimensional single well compositional reservoir simulation, with velocity-dependent relative permeabilities functions of Capillary Number (Nc) and Forchheimer parameter (β). The model was then used to investigate oil productivity impairment due to "gas blockage" near the wellbore and the use of vertical hydraulic fractures and horizontal wells to mitigate the impairment to flow of the oil phase due to "gas blockage". The result shows that end point relative permeability of oil phase and oil fluid composition are the most important factors affecting productivity of volatile oil reservoirs producing below bubble point pressure. This study suggests in volatile oil reservoirs, both vertical hydraulic fractures and horizontal wells are best implemented early in the wells life to delay the time when the flowing bottomhole pressure drops below the bubble point pressure, hence improving ultimate recovery.
Bubble point
Multiphase flow
Capillary pressure
Relative permeability
Cite
Citations (2)
Bubbles generated from oil-immersed transformer is prone to stimulate partial discharge, causing the failure of liquid insulation. Previous studies about bubbles inception in oil-paper interface mostly used experimental methods qualitatively. But these methods are hard to simulated bubble effect in quantitative. By examining the mechanism of bubble evolution phenomenon in oil-paper interface and bubble dynamics, a numerical model of bubble evolution is established. Firstly, the bubble growth process in oil-paper interface is controlled by Rayleigh-Plesset equation, which governs the dynamics of a spherical bubble in incompressible fluid. Then the kinetic vapor flow rate and bubble internal pressure during the heating environment is controlled by Idea Gas Law and HertzKnudsen equation. Eventually, the bubble growth curve is obtained. The predicted Initial Temperature of Bubble Escape (ITBE) and the detachment radius of bubble are verified by experimental data. The results show that the ITBE decreases with higher moisture content of paper. And the aged paper increases the ITBE by enlarging the capillary pore radius in same conditions. This research could help to study the mechanism of bubbles inception in oil-paper interface.
Bubble point
Capillary pressure
Cite
Citations (0)
Bubble point
Allowance (engineering)
Cite
Citations (32)
Bubble point
Boiling point
Cite
Citations (10)