Lifting Dam, Ansys Fluent Training

4.5 (2 reviews)


In this project, two different cases of lifting dams have been simulated and the results have been investigated.

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

Numerical simulation of lifting dam has been performed using Ansys Fluent software in this project. The VOF model is used to simulate two fluid phases, and the purpose of this project is to investigate the changes in the free surface of the fluid over time. Two models are reviewed in this project. In the first model, the flow continues its path after crossing the dam, but in the second model, it encounters an obstacle.

Geometry & Mesh

The two-dimensional geometry of this project has been produced with Spaceclaim software. The length of the computational area is 70 mm, and its height is 40 mm.


The meshing of these geometries has been done using Ansys Meshing software. The mesh type is unstructured in all of the computational domains. The element number for case 1 is equal to 86611 and for case 2 is equal to 132614.


Lifting Dam CFD Simulation Settings

We consider several assumptions to simulate the present model:

  1. Due to the incompressibility of the flow, the pressure-based solver method has been selected.
  2. The simulation is transient.
  3. The gravity effect is considered equal to -9.81 m.s-1on Y-axis

The Laminar viscous model has been used to solve the flow field equations, and the pressure-velocity coupling scheme is SIMPLE. The second-order upwind discretization method has been used for momentum and PRESTO! For the pressure discretization.

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

Homogeneous model Volume of fluid
Number of Eulerian phases 2(air& water)
Interface modeling Sharp


Formulation explicit
Body force formulation Implicit body force
Viscous Laminar
Material Properties
Density 1.225
viscosity 1.7894e-05
Density 998.2
viscosity 0.001003
Pressure-Velocity Coupling SIMPLE
  Pressure PRESTO!
  Momentum Second-order upwind
Volume fraction
Initialization methods Standard
Patch Phase Phase2
  Variable Volume Fraction
Registers to patch Region_0
Value 1
Run calculation
Time advancement Type adaptive
Initial time step size 0.0005
Settings Minimum time step size 0.0005
Maximum time step size 0.0005
Time step size 2000


In this simulation, the free surface of the fluid when the dam is opened is investigated. After the solution process is completed, contours of velocity, pressure, and volume fraction are extracted.  It is observed that in the second case after the flow hits the fluid barrier, reaches a relatively high altitude, which is due to the high kinetic energy in the initial moments.

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

2 reviews for Lifting Dam, Ansys Fluent Training

  1. Alva

    Perfect! I am new to Ansys fluent. These tutorials are really helpful.

  2. Franck J.

    What is the deffenrece between the” Eulerian VOF” model and the “VOF model”?

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