ABSTRACT
Although a consensus has been reached as to the general outlines of bursting motions in the wall region of flow over smooth and rough beds, important unresolved questions remain:
Do the bursting motions grow into transverse vortices in the outer region, and do their vortices in turn generate new bursting motions farther downstream in the wall region?
How do interactions occur between bursting motions and large-scale vortical motions?
Are the bursting motions drastically different at extremely high Reynolds numbers ? For example, what are bursting motions like in geophysical lows such as rivers?
