Hydrocyclone with a Tangent-Circle Inlet CFD Simulation (Validation)
The simulation is based on a reference article “Effects of curvature radius on separation behaviors of the hydrocyclone with a tangent-circle inlet” and its results are compared and validated with the results in the article.
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The present problem simulates the two-phase flow of air and water inside a hydrocyclone. The simulation is based on a reference article “Effects of curvature radius on separation behaviors of the hydrocyclone with a tangent-circle inlet” and its results are compared and validated with the results in the article. In this project, two phase flow of water and air inside a hydrocyclone is simulated. The water will enter the computational domain tangentially with a velocity of 6m/s based on the paper. The Reynolds Stress Model is exploited to solve fluid flow equations and VOF multiphase model is used to investigate the phase interactions of the water and air core.
Hydrocyclone Geometry & Mesh
The geometry of this model consists of a water inlet and two pressure outlets and is designed in ANSYS design modeler®. It is meshed in ANSYS meshing®. The mesh type used for this geometry is unstructured. The total element number is 228517.
Hydrocyclone CFD Simulation Settings
The key assumptions considered in this project are:
- Simulation is done using pressure-based solver.
- The present simulation and its results are transient.
- The effect of gravity has been taken into account and is equal to -9.81 m/s2 in Z direction.
The applied settings are summarized in the following table.
|Viscous model||Reynolds stress|
|Wall treatment||Standard wall functions|
|Body force formulation||Implicit body force|
|Surface tension coeff.||0.0725 n/m|
|Velocity magnitude||6 m/s|
|Gauge pressure||0 Pa|
|Volume fraction||Modified HRIC|
|momentum||first order upwind|
|Reynolds stresses||first order upwind|
|Turbulent kinetic energy||first order upwind|
|Turbulent dissipation rate||first order upwind|
|gauge pressure||0 Pa|
|velocity (x,y,z)||(0,0,0) m/s|
|air volume fraction||1|
|Turbulent kinetic energy||0.005544744 m2/s2|
|Turbulent dissipation rate||0.0009691836 m2/s3|
Paper Validation Results
At the end of this simulation, the results of the present work are compared with results obtained by the paper. For this purpose, the diagram in figure 10 was used which shows the changes of axial velocity of the mixture fluid based on the radial position of the hydrocyclone.
All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, the Training File presents how to solve the problem and extract all desired results.