The combined effect of electric forces and confinement ratio on the bubble rising
| Autor: | Mehmet Yildiz, Nima Tofighi, Amin Rahmat |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Toroid Mechanical Engineering Bubble Reynolds number 02 engineering and technology Mechanics TC1-978 Hydraulic engineering Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Surface tension symbols.namesake 020303 mechanical engineering & transports 0203 mechanical engineering 0103 physical sciences Volume of fluid method Shear stress symbols Streamlines streaklines and pathlines Electrohydrodynamics |
| Zdroj: | International Journal of Heat and Fluid Flow. 65:352-362 |
| ISSN: | 0142-727X |
| DOI: | 10.1016/j.ijheatfluidflow.2017.01.002 |
| Popis: | In this work, the combined effect of electrohydrodynamic forces and domain confinement on the formation of a toroidal bubble is numerically studied. The numerical scheme is the Volume of Fluid (VOF) method and the surface tension and electric forces are implemented using the Continuum Surface Force (CSF) and leaky dielectric models, respectively. It is found that both domain confinement and electric forces are influential on the formation of a toroidal bubble. For smaller confinement ratios, larger electric forces are required to pierce the bubble. Moreover, the influence of both electric forces and confinement ratio are presented and discussed for bubble vertical velocity, terminal Reynolds number, velocity streamlines and side-wall shear stress. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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