Abstract
Turbulent water jet impingement on surfaces has several applications in cleaning processes and heat transfer equipment. This work aims to find the effect of variation in inlet jet Reynolds number on variation wall shear stress and pressure on surfaces encountered in equipment used in food processing industries, particularly in the dishwasher domain. Computational fluid dynamics simulation of turbulent water jet for Re >6000 is performed in ANSYS Fluent. Simulations are run using the volume of fluid Eulerian multi-phase model with the standard k-ε turbulence modeling. Discretisation is carried out by the implicit unsteady solver scheme, and the SIMPLE algorithm is chosen to solve the set of equations. Shear stress at Re = 6300 is validated with experimental results. There is drastic variation in the static pressure and wall shear stress with Reynolds number. Critical jet exit velocity required for effective cleaning of flat plaste is found to be 3 m/s.
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