Statistical Characteristics of Water Film Falling Down Large Flat Plate

The statistical characteristics of a water film freely falling down a large vertical flat plate were investigated. The thickness of liquid film was measured by using the capacitance probe. The effects of the film flow rate and the solid surface on the thickness and coverage of falling film were examined and discussed, and the correlation of film thickness based on Reynolds number was obtained. With the flow rate increasing, the coverage will enlarge but the thickness will remain after the critical film thickness is achieved, and there is a larger coverage for the plate with a smaller contact angle at the same flow.