| Autor: |
Dominique Legendre, Catherine Colin, Typhaine Coquard |
| Předmět: |
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| Zdroj: |
Philosophical Transactions of the Royal Society A: Mathematical, Physical & Engineering Sciences; Jun2008, Vol. 366 Issue 1873, p2233-2248, 16p |
| Abstrakt: |
The three-dimensional flow around a hemispherical bubble sliding and growing on a wall in a viscous linear shear flow is studied numerically by solving the full Navier–Stokes equations in a boundary-fitted domain. The main goal of the present study is to provide a complete description of the forces experienced by the bubble (drag, lift and added mass) over a wide range of sliding and shear Reynolds numbers (0.01≤Reb, Reα≤2000) and shear rate (0≤Sr≤5). The drag and lift forces are computed successively for the following situations: an immobile bubble in a linear shear flow; a bubble sliding on the wall in a fluid at rest; and a bubble sliding in a linear shear flow. The added-mass force is studied by considering an unsteady motion relative to the wall or a time-dependent radius. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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