Creating a Fan Internal Boundary Condition in Ansys Fluent
Hello. Today's topic is on defining an internal fan inside a fluid volume for an Ansys Fluent analysis. For this purpose, we have constructed two concentric cylinders:
- The outer cylinder (green) represents the room.
- The inner cylinder (orange) represents the fan.
Locating the Fan
- Define a plane and move it to the fan's location.
- Split the room and fan bodies using this plane, resulting in four parts: fan, fan1, room, and room1.
- The fan boundary condition will be on the plane where fan1 and fan meet.
Defining Boundary Conditions
- Tag all outer surfaces as walls.
- Turn off all components except the fan and mark the fan surface. This interface will be named as fan.
- Share the topology between the four separate bodies.
Meshing in Fluent Mesher
- Launch Fluent Mesher. The geometry is automatically imported.
- Create a surface mesh using default settings.
- Specify that only fluid volumes are present.
- Update boundaries, keeping the fan boundary as a wall for now, to be fixed in the Fluent stage.
- Add boundary layers at the walls.
- Generate the volume mesh, which includes polyhedra cells.
The mesh shows four volumes, with the fan interface between the green and gold parts. Once meshing is complete, switch to the solution stage in the classic Fluent GUI.
Setting Boundary Conditions in Fluent GUI
- Navigate to Boundary Conditions and expand the wall list.
- Adjust the following:
- fan1, room1 wall: Change from wall to interior type, as it is an interface between two fluid blocks.
- fan and room: Change to interior type.
- room and room1: Change to interior type.
- Switch the fan and fan shadow walls to the fan type, which will automatically adjust the shadow side as well.
- Make necessary changes in the fan window and apply them.
This concludes our presentation on how to add an internal fan boundary condition into a Fluent model.
Hello. Today's topic is "Creating a Fan Internal Boundary Condition in Ansys Fluent." Defining an internal fan inside a fluid volume: I have built two concentric cylinders. The outer cylinder, which is green, represents our room, and the orange cylinder, which is inside, represents the fan.
Step 1: Locate the fan. * Define a plane and move it to where the fan lies. * Split the room and the fan bodies using this plane. Now we have fan1 and fan, room and room 1. * Our fan boundary condition is going to be on a plane where fan1 and fan meet.
Step 2: Define boundary conditions. * Define a plane and tag all the outer surfaces as walls. * Turn off all the components except the fan and mark the fan surface. * Name this interface as "fan." Step 3: Share the topology between these four separate bodies.
In ANSYS Space Claim: Step 4: Go to the meshing step. * Use a watertight geometry workflow in Fluent Mesher. * Generate the surface mesh, then say we only have fluid volumes. * Update boundaries, keeping the fan boundary as a wall and fixing it in the Fluent stage. * Add boundary layers at the walls. * Generate the volume mesh.
In Fluent GUI: Step 5: Care about the boundary conditions. * Go to boundary conditions, expand under the wall. * Correct the boundary conditions: + fan1, room1 wall: change to interior type. + between fan and room: change to interior type. + between room and room1: change to interior type. * Switch fan and fan shadow walls to the type "fan." This concludes our presentation on how to add an internal fan boundary condition into a Fluent model.
