Use of a VOF based interface tracking method for film boiling flow calculations
碩士 === 國立交通大學 === 機械工程學系 === 99 === A single-fluid model with a VOF based interface tracking method (CISIT) is used for simulation of two-fluid flows with heat and mass transfer in this study. The finite volume method is used as the discretiztion method. The motion of the interface is tracking by th...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2011
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| Online Access: | http://ndltd.ncl.edu.tw/handle/77070788598905760838 |
| Summary: | 碩士 === 國立交通大學 === 機械工程學系 === 99 === A single-fluid model with a VOF based interface tracking method (CISIT) is used for simulation of two-fluid flows with heat and mass transfer in this study. The finite volume method is used as the discretiztion method. The motion of the interface is tracking by the solution of a transport equation for the volume fraction. By using the interface position obtained from the interface tracking method the heat flux which drives the phase change on interface can be calculated. The mass change across the phase boundary is computed by taking the mass and energy jump conditions at the interface. It is added as a source term in the continuity equation. This continuity equation is used in the pressure-velocity coupling algorithm. After the velocity field obtained from solving the momentum equation the jump condition for the continuity is satisfied. To assess the accuracy of this mode two test problems for which analytical solutions are available, are considered. It is shown that the precision of the temperature profile and the length used for calculating temperature gradients at the interface would affect the accuracy of simulation. Finally, a simulation of film boiling on a horizontal plate is presented. It shows that how the bubble growth affects the heat and mass transfer of the flow.
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