To model the transitional flow in the topology, a validated low Reynolds number k-omega (LKW) turbulence model is employed to account for the turbulence in the flow.

The results show erosive overland flow have virtual laminar flow,transitional flow and turbulent .

With its help, the pressure pulsations of the three typical flow regimes existing in the bed which are trickling flow,transition flow and pulsing flow were measured.

Vision detecting spray transfer pool and contour extraction;

Experimental studies of model show that when the base slope of spillways changes within the range of 40 degrees to 60 degrees,the water-wing nearly exists in the whole nappe flow,even continues to the transition flow.

Model experimental studies indicating that when the base slope of spillways changes within the range of 40 degrees to 60 degrees,the water-wing nearly exists in the whole nappe flow,even continuing to the transition flow.

7°,19° and 30°) shows that energy dissipation ratio under skimming flow,transition flow or nappe flow,would not be confined by the relative critical water depth on weir (y_c/h≤2.

The rate of variation of evaporate transition current influencing on the filmy physical feature;

A self-adapting control method of Al pulsed-MIG welding for meso-spray transfer;

Impact of welding parameters on the meso-spray transfer in Al pulsed-MIG welding has been studied in the Al pulsed-MIG welding experiment based on meso-spray transfer self-adapting control.