In order to manage water contamination and demonstrate environmental preservation efforts, the wastewater treatment process is essential. Since mixing machinery handles anaerobic and aeration tanks, treating wastewater in cities, towns, and industry is crucial. The wastewater sewage mixer maintains the mixture’s flow to reduce the amount of sludge accumulating on the pool floor. Thanks to two reference papers “ MIXING PERFORMANCE OF SEWAGE TREATMENT MIXER AT DIFFERENT ROTATIONAL SPEED” and “ Numerical simulation and experimental investigation of submersible sewage mixer performance”, the present CFD study done by ANSYS fluent is conducted.

Simulation Process

The impeller and environment are initially designed using Spaceclaim. The sewage mixer propeller requires a circular zone around it to pave the way for using Multi Reference Frame (MRF) later. The complicated model then meshed inside Fluent meshing tool. The rotational velocity of 50rpm is applied. Notably, the angle of attack remains constant during the rotation, this is why let us utilize MRF approach.

Post-processing

The efficacy of the mixing process and fluid dynamics were significantly improved by simulating a wastewater sewage mixer propeller. The fluid just behind the propeller blades was seen to accelerate up to 1.5 m/s, indicating a significant improvement in mixing capacity. Thorough 3D models were produced, displaying the mixing tank’s velocity distribution, flow properties, and flow patterns. The propeller’s ability to create a homogenized mixture was demonstrated by these visualizations, which showed areas of high and low velocity.