Building the mesh

This section describes the step-by-step procedure to prepare the mesh for the coolant filling system model that contains tank, battery pack, radiator, pump, coolant pipe and vent pipe. The mesh is created using the General Mesher and Template Mesher.

Battery pack

1. Select all CAD Surfaces for battery packs (names with battery_) in the Geometric Entities Panel.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0001 and Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel.
4. Click Create Mesh. A new mesh battery_pack is created under Built Meshes and Volumes in the Geometric Entities Panel.

Tank

1. Select all CAD Surfaces for tank (names with tank_) in the Geometric Entities Panel.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.0015, Minimum Cell Size = 0.0001 and Cell Size on Surfaces = 0.0015 and Cell Size Specification as Absolute in the Properties Panel.
4. Click Create Mesh. A new mesh tank is created under Built Meshes and Volumes in the Geometric Entities Panel.

Pump - Rotor

1. Select all CAD Surfaces for rotor (names with rotor_ in the Geometric Entities Panel and enter Mesh Name as rotor_.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0001, Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel. Select Volume Options as Multiple Volumes.
4. Click Create Mesh. A new mesh rotor_ is created under Built Meshes and the meshed volume rotor is generated under Volumes in the Geometric Entities Panel.

Pump - Volute

1. Select all CAD Surfaces for volute (names with volute_) in the Geometric Entities Panel and enter Mesh Name as volute.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0001, Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel. Select Volume Options as Multiple Volumes.
4. Click Create Mesh. A new mesh volute is created under Built Meshes and the meshed volume volute is generated under Volumes in the Geometric Entities Panel.

Coolant pipe

1. Select all CAD Surfaces for coolant pipe (names with pipe_) in the Geometric Entities Panel.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0001, Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel. Select Volume Options as Single Volume.
4. Click Create Mesh. A new mesh pipe is created under Built Meshes and Volumes in the Geometric Entities Panel.

Vent

1. Select all CAD Surfaces for vent (names with vent_) in the Geometric Entities Panel.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0001, Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel. Select Volume Options as Single Volume.
4. Click Create Mesh. A new mesh vent is created under Built Meshes and Volumes in the Geometric Entities Panel.

Headers

1. Select all CAD Surfaces for headers (names with header1 and header2) in the Geometric Entities Panel and enter Mesh Name as headers.
2. Select General Mesher in the Mesh Panel.
3. Enter Maximum Cell Size = 0.001, Minimum Cell Size = 0.0003, Cell Size on Surfaces = 0.001 and Cell Size Specification as Absolute in the Properties Panel. Select Volume Options as Multiple Volumes.
4. Click Create Mesh. A new mesh headers is created under Built Meshes and header1 and header2 are generated under Volumes in the Geometric Entities Panel.

Tubes Select all CAD Surfaces for tubes (names with tubes_) in the Geometric Entities Panel. Select General Mesher in the Mesh Panel. Enter Maximum Cell Size = 0.002, Minimum Cell Size = 0.0001 and Cell Size on Surfaces = 0.002 and Cell Size Specification as Absolute in the Properties Panel. Enter Mesh Compression Factor = 4, Mesh Compression Direction = Z and Volume Options as Single Volume. Click Create Mesh. A new mesh tubes is created under Built Meshes and Volumes in the Geometric Entities Panel. The mesh settings for the tubes and list of available Volumes are shown, see Figure 17.54.

Figure 17.54 - Tubes mesh settings

 

Figure 17.55 - Battery pack

Figure 17.56 - Radiator

Figure 17.57 - Tank

Create interfaces

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

The steps to create the MGI are as follows:

1. Geometric Entities Panel > Volumes > Boundaries, select entities under Boundaries as shown in Table 17.4.
2. Click Connect Selected Boundaries via MGI icon to create the MGI entities.
   

A group display of entities can be viewed using the Group Entities by Volumes/Types icon in Geometric Entities Panel toolbar. Following are the (MGIs) to be created with corresponding boundaries, as shown in Table 17.4.

Interfaces

Connecting interfaces	Boundaries	Entity
Battery Pack and Pipe	battery_pack_inlet_mgi1_pipe and pipe_mgi6_battery_pack_inlet	MGI01
Battery Pack and Pipe	battery_pack_outlet_mgi2_pipe and pipe_mgi5_battery_pack_outlet	MGI02
Header1 and Pipe	header1_mgi2_pipe and pipe_mgi2_header1	MGI03
Header2 and Pipe	header2_mgi2_pipe and pipe_mgi4_header2	MGI04
Header1 and tubes	header1_mgi1_tubes and tubes_mgi1_header1	MGI05
Header2 and tubes	header2_mgi1_tubes and tubes_mgi2_header2	MGI06
Tank and Pipe	tank_mgi1_pipe and pipe_mgi8_tank	MGI07
Tank and Vent_pipe	tank_mgi2_vent_pipe and vent_mgi3_tank	MGI08
Tank and Vent_pipe	tank_mgi3_vent_pipe and vent_mgi1_tank	MGI09
Rotor and Pipe	rotor_inlet_mgi_pipeand pipe_mgi7_rotor_inlet	MGI10
Vent_pipe and Pipe	vent_mgi2_pipeand pipe_mgi1_vent_pipe	MGI11
Vent_pipe and Header2	vent_mgi4_header2 and header2_mgi3_vent_pipe	MGI12
Volute and Pipe	volute_outlet_mgi_pipe and pipe_mgi3_volute_outlet	MGI13
Rotor and Volute	rotor_mgi_volute and volute_mgi_rotor	MGI14

Table 17.4 - Creating 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.