Two-phase stirred tank reactor simulation using OpenFOAM®

Two-phase stirred tanks are two phase reactors with enhanced mixing and elongated gas holdup and residence time in comparison to bubble columns. They may contain one or more sets of impellers that promote mixing force and help bubble breakage to enhance gas-liquid contact. In this tutorial, you will learn how simulate a stirred tank reactor using multiple reference frame (MRF) method. The method is briefly explained in the tutorial.

  • Solver: twoPhaseEulerFoam
  • Compatible with: OpenFOAM 7, OpenFOAM 6, OpenFOAM v1912
  • Model: Euler-Euler compressible flow, laminar model,3D, MRF
  • Physical System: A stirred tank reactor with a bottom sparger is simulated.

 

  • Description: The stirred tank reactor in this tutorial has a cylindrical shell with inner diameter of 0.4 m and height of 0.35 m. The bottom cap is a 2:1 ellipse (radius1 is 0.2 m and radius2 is 0.1 m) and top of this cylinder is open to atmosphere. A four-bladed impeller is located in the middle of the reactor to provide the mixing force. This impeller rotates with at 120 RPM. The surface geometries of this mixer and the reactor vessel are provided in the form of stl files. The vessel is initially filled up to 0.15 m with water at 300 K. Air enters the reactor through a sparger located beneath the impeller at the bottom of the reactor.

Stirred Tank Reacotr

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