Effect of surface contact angle on the wall impingement of a power-law liquid jet

This study theoretically investigated the impinging liquid sheet, formed by a power-law liquid jet obliquely encroaching on a wall surface. Based on the control volume method, the governing equations of the liquid sheet were established through force balance analysis at the curved edge. To solve the governing equations, energy conservation in the theoretical model was also considered throughout the impinging process. Typical working conditions were selected to validate the theoretical predictions. The results showed that the theoretical inner counter of liquid sheet agreed well with experimental data. Based on the theoretical model, influence of rheological parameters, surface contact angle, and surface tension coefficient are discussed, respectively. It is concluded that the surface contact angle could affect liquid sheet size by changing the total surface tension force at the rim, as well as the surface energy variation in the energy conservation equation.