Separator CFD Simulation, Three-Phase Flow, ANSYS Fluent Training
$140.00 Student Discount
In this project, a 3-Phase Horizontal Separator with an Oil Bucket is simulated.Click on Add To Cart and obtain the Geometry file, Mesh file, and a Comprehensive ANSYS Fluent Training Video. By the way, You can pay in installments through Klarna, Afterpay (Clearpay), and Affirm.
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Separator Problem Description
The 3-Phase Horizontal Separator works based on the density differences of fluids. The mixture of fluids inter through the inlet vessel and, after collision with the inlet diverter, enters the tank. In reality, the Separator is equipped with sensors to control oil and water level and then control mass flow.
Therefore, controlling the mass flows is a challenge in the simulation. In this project, the density of air, water, and oil is assumed to be 1.2, 998 & 689 kg/m^3, respectively. Also, the VOF Multiphase model is used.
Geometry & Mesh
The 3D geometry is modeled in Ansys Design Modeler software. A cylindrical zone with a 1m diameter extended for 8 meters with two caps. Also, the mesh grid is carried out using Ansys Meshing software.
Furthermore, an unstructured grid is generated, and in total, 7166267 elements established the fluid domain, which is depicted in the following figure.
Several assumptions have been considered to simulate the horizontal 3-phase separator, including:
- The simulation is steady.
- The pressure-based solver type is used due to the incompressibility of the working fluids.
- Gravitational acceleration effects are applied in the y-direction.
The following table represents a summary of the solution:
|Fluid||Definition method||Fluent database|
|Cell zone condition|
(Stationary – No-slip condition)
|Spatial Discretization||Gradient||Least squares cell-based|
|Volume Fraction||Modified HRIC|
|Turbulent kinetic energy||First-order upwind|
|Turbulent dissipation rate||First-order upwind|
|Initialization||Initialization methods||Standard Initialization|
|Number of time steps||1000|
After the simulation process, the two & three-dimensional contours are extracted. It is evident that high inlet velocity could increase the mixing rate, which is not our interest and aim. So by using an inclined diverter, the velocity decreases and enters the fluid domain.
Due to the density gradient, the dense fluid (water) remains at the bottom of the tank, and the oil on the top reaches the oil bucket level and leaves the tank. The volume fraction contours corroborate the claim.