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In this section the various solver properties will be specified in order to obtain the proper solution for the laminar pipe flow. First, the axisymmetric nature of the geometry must be specified. Under General > Solver > 2D Space select Axisymmetric as shown in the image below.  Image Added

Next, the Viscous Model parameters will be specified. In order to open the Viscous Model Options Models > Viscous - Laminar > Edit.... By default, the Viscous Model options are set to laminar, so no changes are needed. Click Cancel to exit the menu.
Now, the Energy Model parameters will be specified. In order to open the Energy Model Options Models > Energy-Off > Edit.... For incompressible flow, the energy equation is decoupled from the continuity and momentum equations. We need to solve the energy equation only if we are interested in determining the temperature distribution. We will not deal with temperature in this example. So leave the Energy Equation set to off and click Cancel to exit the menu. 

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Now, the properties of the fluid that is being modeled will be specified. The properties of the fluid were specified in the Problem Specification section. In order to create a new fluid (Click) Materials > Fluid > Create/Edit... as shown in the image below.  Image Added

In the Create/Edit Materials menu set the Density to 1kg/m^3 (constant) and set the Viscosity to 3.61e-2 kg/(ms) (constant) as shown in the image below.  Image Added

Click Change/Create. Close the window. 

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At this point the boundary conditions for the four Named Selections will be specified. The boundary condition for the inlet will be specified first. 

Inlet Boundary Condition

In order to start the process (Click) Boundary Conditions > inlet > Edit... as shown in the following image.  Image Added

Note that the Boundary Condition Type should have been automatically set to velocity-inlet. Now, the velocity at the inlet will be specified. In the Velocity Inlet menu set the Velocity Specification Method to Magnitude, Normal to Boundary, and set the Velocity Magnitude (m/s) to 0.277 m/s, as shown below.  Image Added

Then, click OK to close the Velocity Inlet menu. 

Outlet Boundary Condition

First, select outlet in the Boundary Conditions menu, as shown below.  Image Added

As can be seen in the image above the Type should have been automatically set to pressure-outlet. If the Type is not set to pressure-outlet, then set it to pressure-outlet. Now, no further changes are needed for the outlet boundary condition. 

Centerline Boundary Condition

Select centerline in the Boundary Conditions menu, as shown below.  Image Added

As can be seen in the image above the Type has been automatically set to wall which is not correct. Change the Type to axis, as shown below.  Image Added

When the dialog boxes appear click Yes to change the boundary type. Then click OK to accept "centerline" as the zone name. 

Pipe Wall Boundary Condition

First, select Wall in the Boundary Conditions menu, as shown below. Image Added

As can be seen in the image above the Type should have been automatically set to wall. If the Type is not set to wall, then set it to wall. Now, no further changes are needed for the wall boundary condition. 

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In order to save your work (Click)File > Save Project as shown in the image below. 

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Go to Step 5: Numerical Solution

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