Eulerian Two Phase Flow in a Moving Wall Cylinder, ANSYS Fluent Tutorial
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- The problem numerically simulates Eulerian Two-Phase Flow in a Moving Wall Cylinder using ANSYS Fluent software.
- We design the 3-D model by the Design Modeler software.
- We Mesh the model by ANSYS Meshing software, and the element number equals 11880.
- We use the Eulerian multiphase model to define two-phase flow including water and air.
- We apply rotational velocity for the inner wall as Moving Wall.
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The present problem simulates Eulerian Two-Phase Flow in a Moving Wall Cylinder by ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.
The system consists of two different fluids, including water as the primary and secondary fluids (with a density of 2610 kg.m-3 and a viscosity of 0.0026 kg.m-1.s-1).
The two-phase flow enters the chamber in the form of a hollow cylinder. The water fluid enters the cylindrical system with a velocity of 0.629 m/s and a volume fraction of 0.67, the secondary fluid with a velocity of 0.099 m/s and a volumetric fraction of 0.23, and under relative pressure conditions of 1379000 pascals.
We design the 3-D geometry of the present model using Design Modeler software. The geometry consists of two outer and inner cylinders, through which the two-phase fluid flows through the space between the outer and inner walls. The input and output of the model are in the form of hollow circles.
We mesh the present model using ANSYS Meshing software. The mesh type is unstructured, and the element number is 11,880.
Therefore, we use the Eulerian multiphase model to define the flow of two fluids in the system. The outer wall of the cylinder is stationary, while the inner wall is a moving wall with a rotational speed around the central axis of the cylinder of 30 rpm.
The present model considers the standard k-omega turbulence model with shear flow correction capability and the dispersed turbulence model for multiphase flow.
This project investigates the rotating wall’s effect on Eulerian multiphase turbulent flow.
After the solution process, the two-dimensional and three-dimensional contours related to pressure (for mixing), velocity (for water phase and secondary fluid phase), the volume fraction of water and secondary fluid, as well as path lines (water and secondary fluid), have been obtained.
Two-dimensional contours are presented in two sections, YZ and XY. The YZ section is defined as passing through the central axis of the cylinder, and the XY section is perpendicular to the cylinder’s central axis at intervals of 4, 9, and 13.716 (output) meters from the input section.