Surface Tension Effect on Air Bubbles under Water Column, Ansys Fluent Training
Price: $120
In this project, the effect of surface tension on air bubbles under a water column has been simulated and the results have been investigated.
Surface Tension Effect on Air Bubbles under Water Column, Ansys Fluent Training
Price: $120
In this project, the effect of surface tension on air bubbles under a water column has been simulated and the results have been investigated.
Surface Tension Effect Project Description
In this project, numerical simulations of air bubbles under a water column with two different surface tension have been done using Ansys Fluent software. The VOF model has been used to simulate and solve the two-phase flow field equations. The two modes in this project are simulated and compared.
Geometry&Mesh
The 2D geometry of the present model is generated using SpaceClaim software. The length of the computational area is 20 mm and its height is 25 mm.
The meshing of the present model has been done using Ansys Meshing software. The mesh type is structured in all of the computational domains, and the element number is equal to 200000.
Surface Tension Effect CFD Simulation Settings
- 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 | Compressive | |
| 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 | 0.0001 | |
| Settings | Minimum time step size | 0.0001 |
| Maximum time step size | 0.0001 | |
| Time step size | 10000 | |
Surface Tension Effect Results
According to the shape of the bubbles, it is clearly visible that the amount of surface tension is very effective in the size of the bubbles. The higher the surface tension, the greater the resistance to compressive force from the fluid and the larger the bubbles formed.