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Flat Plate Boundary Layer

Fluent 14 Seminar

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Flow on a Flat Plate

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Open ANSYS project file

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Launch ANSYS

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Workbench View and Setup

Ignore warnings messages, refresh and update project.

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Update Setup

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Launch Fluent

Use double precision and start application.

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Flat Plate Mesh

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Verify mesh size

On the main toolbar, go to Mesh, Info, and Size:

You should see this output:

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General options

Choose Planar.

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Fluid Properties

(1)

(2)

Set above properties and choose Change/Create,

and Close.

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Boundary Conditions: Inlet

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Outlet and Wall Conditions

Set the outlet of the pipe as Type pressure outlet, and the pipe wall as Type Wall.

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Far Field Condition

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Choose solution method

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Monitors

Edit Residuals-Print,Plot to set 1e-6 tolerance on the Monitors Panel above.

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Initialization

Use the standard initialization method,

and verify that the X Velocity is

Set to 1m/s. Then press Initialize.

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Launch solver

Choose Run Calculation, set the Number of Iterations to 1000 and press Calculate twice.

A solution should be obtained in about 560 iterations.

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Outlet velocity

Go to Results, choose XY Plot and Set up. On the Solution XY Plot panel above, set

Velocity..., X Velocity on Y Axis Function, and on X Axis Function set

Direction Vector. On surfaces set outlet. Note Plot directions X = 0, Y = 1.

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Outlet Velocity

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Customizing Plot

On Curves Set Pattern, choose Color white, and unset Symbol as shown above.

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Customized Outlet Velocity

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Customize Y-Axis

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Customize X-Axis

Choose X axis, unset Auto Range and specify the Minimum and Maximum ranges

to 0 and 0.12, respectively. Apply changes and close.

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Plot with Minor and Major Tics

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Comparison with Blasius Solution

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Homework

Compare the given Blasius solution with thenumerical solution at half the length of the

plate x = L/2. On the same figure show the

Blasius solution and the numerical solution byFluent. Report numerical error.