Abstract
The motion of mono-dispersed spherical bubbles rising along an inclined flat plate has been observed experimentally and the effects of the inclination angle and the air flow rate have been instigated. When number density of bubbles becomes higher and the rising velocity along an inclined flat plate becomes slower, the bubbles tend to be horizontally arranged in lines and such arrangements pile up to the bubble cluster. This clustering tendency is similarly confirmed when the no-slip condition, as well as the free-slip condition, is imposed on the bubble surface. On the other hand, the interaction of the no-slip bubbles yields larger displacement in the lateral direction.
