In this work, the velocity fields and vorticity of an industrial bath sonoreactor of 500 kHz were obtained experimentally evaluated by PIV technique. Based on the results obtained immediately after the sonoreactor was turned on, the velocity and the axial flow number (𝑁_{𝑄𝑎𝑥(𝑧)}), were calculated at different times. The formation of stable vortexes, near the sonoreactor walls, were observed after 5 minutes of sonoreactor operation. Due to the difficulty of perform measurements during the initial operation time simulations performed at small period of time were performed by the Large Eddy Simulation (LES), showing the trend of the flow in the sonoreactor.