Lifting Dam CFD Simulation, Ansys Fluent Training
Price: $24
In this project, two different cases of lifting dams have been simulated and the results have been investigated.
Lifting Dam CFD Simulation, Ansys Fluent Training
Price: $24
In this project, two different cases of lifting dams have been simulated and the results have been investigated.
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:
- Due to the incompressibility of the flow, the pressure-based solver method has been selected.
- The simulation is transient.
- 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:
| Models | ||
| Multiphase | ||
| Homogeneous model | Volume of fluid | |
| Number of Eulerian phases | 2(air& water) | |
| Interface modeling | Sharp Interfacial | |
| Formulation | explicit | |
| Body force formulation | Implicit body force | |
| Viscous | Laminar | |
| Material Properties | |
| Air | |
| Density | 1.225 |
| viscosity | 1.7894e-05 |
| water-liquid | |
| Density | 998.2 |
| viscosity | 0.001003 |
| Methods | ||
| Pressure-Velocity Coupling | SIMPLE | |
| Pressure | PRESTO! | |
| Momentum | Second-order upwind | |
| Volume fraction | ||
| Initialization | ||
| Initialization methods | Standard | |
| Patch | Phase | Phase2 |
| Variable | Volume Fraction | |
| Registers to patch | Region_0 | |
| Value | 1 | |
| Run calculation | ||
| Time advancement | Type | adaptive |
| Parameters | ||
| Initial time step size | 0.0005 | |
| Settings | Minimum time step size | 0.0005 |
| Maximum time step size | 0.0005 | |
| Time step size | 2000 | |
Results
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.