Firehose Simulation, Ansys Fluent Training

3.8 (5 reviews)


In this project, a firehose has been simulated and the results have been investigated.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Firehose Project Description

The current project simulates the firehose by Ansys Fluent software. The system consists of two different fluids, including air as the primary fluid and one secondary fluid is water. The Eulerian VOF model has been used. The water is entering the domain with a speed of 9 m/s with gravity considered as -9.81 m/s-2 on the y-axis.


The 2-D geometry of the present model is carried out using Design Modeler software. The geometry has a one-cylinder shape object as imaginary on fire, and firehose as inlet, firehose geometry itself design by followed eruption firehose standard shape to simulate water flow directly and accurately. Ground and object considered as wall and also around sphere considered as an outlet.


The meshing of this present model has been generated by ANSYS Meshing software. The mesh grid is unstructured with no element quality lower than 0.61, and the total cell number is 147351. the figure below shows an overview of the performed mesh.


Firehose 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 tables represent a summary of the defining steps of the problem in this project and its solution:

K-omega Viscous model
Realizable k-epsilon model
shear flow corrections k-epsilon options
air primary phase
Water secondary phase
explicit formulation
Boundary conditions
Velocity-inlet inlet
0 initial gauge pressure mixture
24 m/s velocity magnitude air
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
9 m/s water velocity (0,y,0)
0 m/s air velocity (x,y,z)
1 the secondary phase volume fraction


Water starts to flow from the firehose nozzle toward a cylinder-shaped object. It finally hits it and covers it with water to burn the imaginary fire. The whole simulation takes action about 1.2 seconds long.

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

5 reviews for Firehose Simulation, Ansys Fluent Training

  1. Derek

    Is creating and extracting animation explained in this tutorial?

  2. Maudie L.

    Is it possible to simulate this project with an intel core i3 and 8 GB of RAM?

  3. Langley

    Hi. I am new to Ansys fluent. I want to learn and simulate two-phase flows. Could you please help me where do I start?

  4. Torsten

    The video is amazing !

  5. Vanessa C.

    I wish it were 3D

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