Colliding of Two Water Jets Simulation, Ansys Fluent Training

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In this project, colliding of two water jets has been simulated and the results have been investigated.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Colliding of Water Jets Project Description

The system consists of two different fluids, including air as the primary fluid and one secondary fluid is liquid water. The Eulerian VOF model has been used. The water is entering the domain with the 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 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.

The following is a summary of the steps for defining the problem and its solution:

K-omega Viscous model
SST k-omega model
shear flow corrections k-omega options
air primary phase
water secondary phase
explicit formulation
Boundary conditions
Velocity-inlet inlet
0 initial gauge pressure mixture
15 m/s velocity magnitude water
1 volume fraction
Pressure outlet outlet
1 backflow volume fraction air
0 backflow volume fraction water
wall wall
stationary wall wall motion
Solution Methods
Phase coupled pressure-velocity coupling
PRESTO! pressure
first-order upwind momentum
first-order upwind specific dissipation rate
first-order upwind volume fraction
standard initialization method
8 m/s water velocity (0,y,0)
15 m/s air velocity (x,y,z)
1 the secondary phase volume fraction

Colliding of 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 and after 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 which presents how to solve the problem and extract all desired results.


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