Wavy water thin-film characteristics on horizontal plate using PLIF Experimental

Nonlinear Thin liquid film is commonly applied in numerous engineering fields, including the Passive Containment Cooling System of the nuclear power plant and steam dryer in the steam generator of nuclear power plants. The counter gas flow effect through a rectangular channel was inspected, the flow is motivated by the pressure gradient and shear gas stress while the gravity force does not influence the flow. Different flow rates of gas were set to different Reynolds numbers from 6950 to 34800 with influence on a different range of input water Reynolds number from 170 to 875 respectively. The data was collected at different sections from inlet flow until the separation section. The thickness of liquid film investigated using (PLIF) experiments. The thickness has been calculated via digital image processing and MATLAB code. Film thickness was obtained as a function of time and frequency. Results were analyzed using statistic tools such as property density function (PDF), fast Fourier transform (FFT), and power spectral density (PSD).