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| A numerical simulation on effects of vertical channel wide on deformation and heat transfer of a rising gas bubble |
| Revised:June 28, 2004 |
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| DOI：10.7511/jslx20062036 |
| KeyWord:bubble motion,VOF,reconstruction technology,surface tension,heat transfer |
| LI Wei-zhong ZHAO Da-yong CHEN Gui-jun |
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| Abstract: |
| The motions,deformation and heat transfer characteristic of a rising gas bubble through the liquid in a vertical channel are numerically predicted in this paper.In this simulation,the VOF method was used to track the interface and the PLIC method was employed to reconstruct the interface.A tension model,called CSF,was introduced to dispose the surface tension.The governing equations were solved by using a finite volume method on a body-fitted coordinates mesh. Independent variables were arranged at collocated grids.The central difference and upwind schemes were used to discrete the diffusion terms and convection terms in the governing equations,respectively.The decoupling between pressure and velocity was solved by means of SIMPLE algorithm.By using the methods and models,motions,deformation and heat transfer characteristic of a rising bubble in a gas liquid two-phase flows system were calculated.Meanwhile,the effects of the vertical channel wide on motion,deformation and heat transfer of the bubble were also investigated.The numerical results are in good agreement with the available experimental data. |
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