You are here: Tutorials > Multicomponent Mixing > Setting up the model > Building the Mesh

Building the Mesh

This section describes the step-by-step procedure for preparing the mesh for the multi component mixing model that contains fuel pipe and nozzle. The mesh is created using the General Mesher.

Nozzle Select General Mesher in the Mesh Panel. Select CAD Surfaces nozzle_fuelpipe_mgi, nozzle_inlet, nozzle_outlet, nozzle_side_inlet and nozzle_walls in the Geometric Entities Panel. Enter Maximum Cell Size as 0.006, Minimum Cell Size as 0.0008 and Cell Size on Surfaces as 0.003 in the Properties Panel. Click Create Mesh. A new mesh nozzle is created under Built Meshes in the Geometric Entities Panel. The meshed volume nozzle is generated under Volumes.

Figure 11.153 - Fuel line mesh settings

 

Fuel Pipe Select General Mesher in the Mesh Panel. Select CAD Surfaces fuelpipe_inlet, fuelpipe_nozzle_mgi and fuelpipe_walls in the Geometric Entities Panel. Enter Maximum Cell Size as 0.02, Minimum Cell Size as 8e-05 and Cell Size on Surfaces as 0.01 in the Properties Panel. Click Create Mesh. A new mesh fuelpipe is created under Built Meshes in the Geometric Entities Panel. The meshed volume fuelpipe is generated under Volumes.

Figure 11.154 - Nozzle mesh settings

The mesh created for the fluid domain is shown below:

Figure 11.155 - Mesh

Figure 11.156 - Cross-sectional view

Create interfaces

In this section, the Mismatched Grid Interfaces (MGI) are generated between boundaries.

The steps to create the MGI is as follows:

1. In the Geometric Entities Panel > Volumes > Boundaries, select entities fuelpipe_nozzle_mgi and nozzle_fuelpipe_mgi shown under Boundaries (see, Figure 11.157).
2. Click Connect Selected Boundaries via MGI icon to create the MGI entity MGI01 (see, Figure 11.158).

A group display of entities can be viewed using the Group Entities by Volumes/Types icon at Geometric Entities Panel toolbar.

The new entities are created under MGI in Volumes (see, Figure 11.158).

Figure 11.157 - Connecting fuel line and nozzle

Figure 11.158 - Created interfaces

 

Note: If MGIs are created by connecting the wrong boundaries, delete the created MGIs by clicking on Delete Selected Geometric Entity icon and then recreate the MGIs.