Numerical simulation of three dimensional water flow through spray nozzle

الملخص EN

A three dimensional numerical simulation of turbulent water flow through air washer system nozzles of cylindrical junction with diameters of 2 mm, 3 mm, 4 mm, 5 mm respectively and of centered diameter with 4 mm was achieved by using FLUENT software.

k-ε model was used in this study.

The entrance region of the model was selected to ensure the constant velocity in the inlet gives results near real solution.

Modeling includes the construction of a 3D model with the aid of AUTOCAD and GAMBIT.

For the purpose of checking the applicability of the modeling and discovering the best location and diameter of cylindrical junction, five different locations and diameters of the cylindrical junction were selected.

The present work shows that the best location and diameter are observed for the case of 4 mm.

The flow simulation was achieved by studying the velocity vector plot and contour plot of pressure in different slices locations through each of 5 geometries.

The results were identical to the physical phenomenon which was observed in the laboratory of fluid mechanics, where the velocities and pressures are zero at exit cylinder center which means that there is no fluid at center of exit cylinder for 4mm case as shown in Fig(1).

The results show also that the maximum skin friction occurs at the peripheral boundaries of the cylindrical junction and exit cylinder.