Velocity fluctuations resulting from the interaction of a bubble with a vertical wall
Por:
Moctezuma M.F., Lima-Ochoterena R., Zenit R.
Publicada:
1 ene 2005
Resumen:
The interaction and motion of a spherical bubble with a vertical wall moving in an ideal fluid are analyzed. This case is representative of a bubble that moves at a high Reynolds number and has a small Weber number. Using potential flow theory, the velocity potential is obtained using a double expansion in spherical harmonics. The presence of the wall is approximated by considering the motion of a bubble and its virtual image. The motion equations, obtained considering an energy conservation argument, are solved numerically for a range of initial conditions. The mean and variance of the bubble velocity are calculated. In particular, the bubble velocity variance is obtained as a measure of the bubble velocity fluctuations resulting from the interaction with the wall. The predictions of this model are in good qualitative agreement with some recent experimental results. © 2005 American Institute of Physics.
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