Week 8- Moving zones approach in Fluent

AIM:

To understand the concept of the Moving Zones approach in Fluent.

THEORY:

In Fluent there are two types of moving zone approach

1. Moving Reference Frame
2. Moving Mesh Approach

MOVING REFERENCE FRAME:

Moving reference frame is of two types,

1. The single Moving reference frame
2. Mixed Moving reference frame

In Moving Reference Frame,

• The frame is moving.
• Mesh topology remains the same.
• There is no change in the control volume.
• It is a steady phenomenon approach.

MOVING MESH APPROACH:

Moving mesh approach is used only for the unsteady phenomenon like,

• Vortex-induced flow.
• Interaction of vortex with bodies.

In Moving Mesh Approach,

• Mesh is moving.
• Topology of mesh changes with time.
• Control volume changes as mesh changes.
• It is an unsteady phenomenon.

PROCEDURE TO SIMULATE THE CASE USING MOVING REFERENCE FRAME:

• First, import the mesh file to fluent.
• Now set the viscous model to k-e, realizable and enhanced wall treatment.
• Set the fluid as air.
• In a cell, zone conditions go to a fluid zone and select the frame motion and enter the rpm as 250rpm.

• Now go to initialization and go with hybrid as there is no inlet and outlet.
• Set the convergence absolute criteria as 0.0001 the get accurate convergence and good results.

VELOCITY CONTOUR:

VELOCITY VECTOR PLOT:

STATIC PRESSURE CONTOUR:

DYNAMIC PRESSURE CONTOUR:

CONCLUSION:

From this simulation, we came to understand the concept of the moving zone approach in fluent.