Numerical analysis of the influence of two-phase flow mass and heat transfer on n-heptane autoignition

2012 ◽  
Vol 159 (6) ◽  
pp. 2056-2068 ◽  
Author(s):  
Zakaria Bouali ◽  
Cecile Pera ◽  
Julien Reveillon
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Mass And Heat Transfer

scholarly journals Modelling of Transient CO2/Water Flow in Wellbore considering Multiple Mass and Heat Transfer

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Xinxin Zhao ◽  
Xiangzhen Yan ◽  
Xiaohui Sun ◽  
Qing Zhao ◽  
Hongwei Jiang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Two Phase Flow ◽  
Coupled Model ◽  
Mass Conservation ◽  
Phase Flow ◽  
Co2 Solubility ◽  
Two Phase ◽  
Gas Kick ◽  
Proposed Model ◽  
Mass And Heat Transfer

A transient fully coupled model is proposed to investigate the two-phase flow of CO2 and water-based fluid in a wellbore, considering the complex mass and heat transfer in different flow patterns and dynamic coupling between the wellbore and reservoir. Based on mass conservation, momentum, and energy balance, the model employs a state-of-the-art equation of state and transport models to analyze the variations of multiphase flow behaviors and CO2 properties in a wellbore. Applied in the scenario of a drilled gas kick, the proposed model is used to simulate the processes of gas migration and two-phase flow in the wellbore. The results indicate that the CO2 solubility increases gradually with the increment of depth, the trend of which shows an abrupt change in 500-1000 m due to the phase transition of CO2. During kick development, the fronts of free gas and dissolved gas increase almost linearly with time. Through a comparison of CO2 and CH4 kicks, gas dissolution is found to significantly suppress the development process of CO2 kick. The error in kick prediction can reach 42% if the effect of gas dissolution is neglected. However, it can be neglected for CH4 kick.

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