Colliding of Two Water Jets CFD Simulation, Ansys Fluent CFD Simulation Training

The system consists of two different fluids, including air as the primary fluid and one secondary fluid as liquid water. The Eulerian multiphase model has been used to simulate the Colliding of Two Water Jets. The water enters the domain with a speed of 15m/s with gravity considered as -9.81 m/s-2 on the y-axis.

Geometry & Mesh

The 3-D domain of this simulation has been designed in ANSYS Design Modeler. Domain has to inlet as jet flow entrance and sides as an outlet; also, pipe side is wall boundary,

The meshing of this present model has been generated by ANSYS Meshing software. The mesh grid is unstructured, and the total cell number is 872642.

Colliding of Two Water Jets CFD Simulation

To simulate the present model, several assumptions are considered, which are:

• The solver is pressure-based.
• Simulation has only examined fluid behavior; in other words, heat transfer simulation has not been performed.
• The effect of gravity on the flow is considered to be 9.81 m.s-2 and along with the y-axis in the present model.

In this simulation, the k–ω SST (Shear Stress Transport) turbulence model was selected in ANSYS Fluent to accurately capture flow separation and near-wall effects. This model combines the advantages of the k–ε model in the free-stream region and the k–ω model near solid boundaries, providing reliable predictions for complex flow patterns. The Production Limiter option was enabled to prevent overprediction of turbulence kinetic energy in regions with strong adverse pressure gradients. Near-wall treatment was defined using the correlation-based approach to ensure proper resolution of boundary layer behavior. The default model constants were retained, as they are generally well-calibrated for most engineering flow conditions.

Colliding of Two Water Jets Results

Two high-speed water jet flows start to flow from pipes and begin to move toward each other; after jets reach each other, the impact sum of velocity magnitude becomes zero, and water splashes to sides.

At the end of the solution process, two-dimensional and 3-D animation and counters of velocity, air, and water volume fraction are obtained.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.