Air-Water Mixing Improvement using Rings CFD Simulation, ANSYS Fluent

Description

Project Description

In this project, air-water mixing improvement using rings is simulated by ANSYS Fluent software. A cylinder containing some rings at the bottom is considered as the  whole domain of simulation. This project aims to show how presenting these solid rings affect water-air mixing. The geometry is designed in Design Modeler software then meshed in ANSYS Meshing generating 6,342,465 unstructured cells.

Methodology

In this simulation because of  the importance of contact surface and mixing of air-water, as a low density-difference multiphase flow, VoF model is activated to simulate mixing the two phases. The first and second phases are air and water that enter the domain countercurrent with 0.0004 and 0.0166 [kg/s] respectively. The turbulence of the flow is simulated by Standard k-e model. The gravity is activated in z, the direction that the two phases flow.

Results

We aim to provide a comprehensive analysis of how such structures can influence the dynamics of water-air mixing. The findings are expected to offer valuable insights into the potential applications and benefits of using solid rings in systems where the mixing of water and air is critical. As can be seen in the obtained contours, pathlines, etc. the small entrance of both air and water and also the low mass flow inlets make two fluids move along the domain smoothly then flowing the two phase among the rings   increases residence time, so the contacting between them increases which leads to better mixing and finally exiting the domain via bigger inlets.