Create a Flow Blockage

Create a Solid Flow Blockage

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

2. In the Flow Blockage dialog box, select Solid Blockage from the Type list.

3. In the Region group, click Select Object and select the geometry to model the solid flow blockage.

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

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

6. (Optional) Specify the Convection Properties to override the Default Convection Properties you specified on the 3D Flow page in the Solution dialog box.

7. Click OK.

Create a Isotropic Porous Flow Blockage

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

2. In the Flow Blockage dialog box, select Porous Blockage — Isotropic from the Type list.

3. In the Region group, click Select Object and select the geometry to model the porous flow blockage.

4. Use the Specify Method list to select the method for calculating the pressure drop. Depending on the type you select, different options are available. See Flow Blockage dialog box— Porous Blockage - Isotropic options and Understanding Porous Flow Blockage resistance methods for more information.

5. Define the characteristics of the flow in the porous region.Select the Flow is Laminar in Blockage check box if you want laminar flow in the porous region.Clear the Flow is Laminar in Blockage check box if you want the same turbulence model in the porous region as for the rest of the fluid domain.

6. Click OK.

Create a Orthotropic Porous Flow Blockage

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

2. In the Flow Blockage dialog box, select Porous Blockage —Orthotropic from the Type list.

3. In the Region group, click Select Object and select the geometry to model the porous flow blockage.

4. Define the characteristics of the flow in the porous region.Select the Flow is Laminar in Blockage check box if you want laminar flow in the porous region.Clear the Flow is Laminar in Blockage check box if you want the same turbulence model in the porous region as for the rest of the fluid domain.Click OK.

5. Define the coordinate system to orient the orthotropic flow blockage. See CSYS dialog box for more information.

6. (Optional) Select Inertial Resistance check box to define the pressure drop as proportional to the dynamic pressure and specify the Head Loss per Length in all three directions.

7. (Optional) Select Permeability check box to define the pressure drop as proportional to the velocity and specify the Permeability Value in all three directions.

8. Click OK.

Learn more

Using a Flow Blockage with other types of boundary conditions

Understanding Porous Flow Blockage resistance methods

Inputs to expressions

Look up more details

Auto-generated expressions

Meshing for turbulence modeling

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

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Create a Flow Blockage, Simcenter 3D 2021.1 Series

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