Estimating the Power Requirement of a Rushton Turbine Using Pointwise and OpenFOAM®

[11 Dec 2013] Mixing tanks are heavily used in process industries where high-speed agitation and rapid mixing are necessary. While impeller-stirred tanks promote efficient mixing, the highly three-dimensional flows pose several meshing and simulation challenges. We will address these challenges using a generic, baffled tank stirred by a Rushton turbine. We will demonstrate how to use Pointwise to generate high-quality unstructured meshes suitable for steady-state moving reference frame calculations. Additionally, using Pointwise's recently-updated native interface to OpenFOAM, we will define both the boundary conditions and zones necessary for OpenFOAM inside Pointwise. That's right – Sets are no longer necessary to define a Zone! Lastly, we will describe how to prepare an OpenFOAM case for a moving reference frame calculation and compute the power necessary to drive the Rushton turbine in a single-phase flow.

Unstructured Surface Mesh on the Rushton Turbine.
Figure 1: Unstructured Surface Mesh on the Rushton Turbine.

Discover How To

  • Resolve thin geometric features using diagonalized quad grids
  • Quickly create point-matched periodic surface meshes to improve interpolation accuracy
  • Save time by creating Sets and Zones for OpenFOAM directly within Pointwise
  • Easily setup OpenFOAM cases for moving reference frame calculations
  • Compute torque/power requirements using OpenFOAM functions
OpenFOAM MRF Solution for the Baffled Mixing Tank.
Figure 2: OpenFOAM MRF Solution for the Baffled Mixing Tank.

Downloads

Description Format File Name File Size [MB]
Webinar Video File MP4 2600
Uninitialized grid for the Rushton turbine geometry PW RushtonTurbineGrid.pw 17
Presentation slides from the webinar PDF RushtonTurbinePresentation.pdf 3
The OpenFOAM case files for this application ZIP RushtonTurbineOpenFOAM.zip
Script to automate domain diagonalization GLF DiagonalizeDoms.glf
Script to compute cell non-orthogonality GLF NonOrthoMetric.glf

Estimating the Power Requirement of a Rushton Turbine Using Pointwise and OpenFOAM® is also now available on YouTube.

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