Create a flow surface

Create a Flow Surface without obstruction faces

1. Mesh the polygon face with 2D elements, or a polygon body with 3D elements with thermal material properties.

2. Choose Home tab→Loads and Conditions group→Flow Surface .

3. From the Type list, in the Flow Surface dialog box, select either Embedded Flow Surface or Boundary Flow Surface.

4. Select one or more polygon faces.

5. In the Surface group, from the Wall Treatment list, specify how the flow solver models the near-wall region of a flow surface.

6. From the Wall Friction list, specify how the software models the surface drag of the flow surface.

7. (Optional) To modify the global convection properties, from the Convection Properties list, select a Convection Property modeling object, or click Create Modeling Object to create a new one.

8. Click OK.

Create a Flow Surface with obstruction faces

1. For each obstruction polygon body, mesh the top face with 2D elements with thermal material properties.

2. Choose Home tab→Loads and Conditions group→Flow Surface .

3. From the Type list, in the Flow Surface dialog box, select either Embedded Flow Surface with Obstructions or Boundary Flow Surface with Obstructions.

4. In the Flow Surface Region, select one or more polygon faces.

5. In the Flow Surface Obstruction Region, select one or more polygon faces that define the obstructions.

6. In the Surface group, from the Wall Treatment list, specify how the flow solver models the near-wall region of a flow surface.

7. From the Wall Friction list, specify how the software models the surface drag of the flow surface.

8. (Optional) To modify the global convection properties, from the Convection Properties list, select a Convection Property modeling object, or click Create Modeling Object to create a new one.

9. Click OK.

Create a moving Flow Surface

1. Choose Home tab→Loads and Conditions group→Flow Surface .

2. In the Flow Surface dialog box, from the Type list, select the appropriate type.

3. Select one or more polygon faces.

4. (Optional) Define wall treatment, wall friction, and convection properties as necessary.

5. In the Rotation/Translation Parameters group, select the Rotating Translating Surface in Shear option.

6. From the Motion Type list, select the type of moving face.

7. Specify a vector for the axis of rotation or the direction of the translational motion.

8. Enter a value for the rotational rate or the translational speed.

9. Click OK.

Learn more

Understanding flow surfaces

Modeling flow surface obstructions

Meshing for flow surfaces

Modeling semi-permeable surfaces

Convection Properties

Inputs to expressions

Fluid meshing

Immersed boundary meshing

Two-way fluid-structure interaction

Look up more details

Auto-generated expressions

Solution dialog box —3D Flow

Geometry creation for body-fitted fluid meshing

Geometry preparation for immersed boundary method

Quick links

Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions

Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Create a flow surface, Simcenter 3D 2021.1 Series

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