The conservation equations of mass and momentum are solved for the two phases, taking special care in the modeling of the interfacial forces. Firstly, isothermal turbulent bubbly ow is mechanistically modeled in a solver named myTwoPhaseEulerFoa-mAdiabatic. Two di erent solvers have been implemented and the simulations have been performed in two dimensions. Special attention has been devoted to the phenomena which govern the void fraction distribution in the radial direction.
#Modéliser terrain surfer 12 code#
The code can be used to predict the distribution of the local ow parameters, i.e.the void fraction, the bubble diameter, the velocity of both liquid and gas, the turbulent intensity as well as the liquid temperature. The modeling has been carried out within the OpenFOAM framework and a two-phase Eulerian approach has been chosen. Within the course of this master thesis project, subcooled nucleate boiling in a vertical pipe has been modeled using CFD. Moreover, a CD is enclosed with the cases run in the thesis so that they can be directly run on a computer for testing or changing for further study.
#Modéliser terrain surfer 12 software#
All the files used in the software can be seen in the Appendix part of the thesis so that if the reader wants to test the simulations or just apply the conditions used in this study for a similar case, can use them as a base. Finally, some possible future work is presented so that the person that wants to take a deeper study of the cases has some ideas to improve the simulations, ideas that could not be carried out in this study due to the lack of time and computational power. For the closed channel flow, which is studied in horizontal, vertical and inclined position, different inlet velocities are given for each phase in order to create the different flow patterns characteristic of the multiphase flow and the results obtained are compared with experiments displayed in Tailter Dukler map that gives the transition between different flow regimes. The results obtained are compared with the analytical solution obtained from the Navier-Stokes equation and also with experimental results from studies done for open-channel flows. When dealing with the open-channel flow different inclinations are simulated and the influence of the Froude number is analyzed. Different parameters are changed in each case to obtain different results, such as the inclination of the channel and the values of the velocity inlets for each phase. Two different situations are studied: open and closed channel flow. The main purpose of this thesis is to develop two-phase simulations using OpenFOAM.
0 kommentar(er)
