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Double click on Setup which will bring up the FLUENT Launcher. Click OK to select the default options in the FLUENT Launcher. Twiddle your thumbs a bit while the FLUENT interface comes up. This is where we'll specify the governing equations and boundary conditions for our boundary-value problem. In On the left-hand side of the FLUENT interface, we see various items listed under Problem Setup. We will work from top to bottom of the Problem Setup items to setup the physics of our boundary-value problem. On the right hand side, we have the Graphics pane and, below that, the Command pane.

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You should have all the surfaces shown here.  You should check whether each surfaces correspond to the right geometry by unchecking unrelated surfaces and click Display to view the surface of interest in the Graphics window.in the above snapshot.  Clicking on a surface name in the Mesh Display menu will toggle between select and unselect. Click Display to view all the currently selected surface entities. Uselect all surfaces and then select each one in turn to see which part of the domain or boundary the particular surface entity corresponds to. For instance, the surface labeled heated_section should correspond to the part of the wall where heating occurs. 

Next, we specify that we want FLUENT to solve the axisymmetric form of the governing equationsNext, we will specify that the problem we are solving is axisymmetric.
General > Solver > 2D Space > Axisymmetric

 
Now let's move on to setting up our model. We will first turn The energy equation is turned off by default. Turn on the energy equation.
Models > Energy - Off > Edit...
Turn on the Energy Equation and click OK.
 
Next, we will setup the Viscous model By default, FLUENT will assume the flow is laminar. Let's tell it that our flow is turbulent rather than laminar and that we want to use the k-epsilon turbulence model to simulate our turbulent flow. This means FLUENT will solve for mean (i.e. Reynolds-averaged) quantities at every point in the domain and will add the k and epsilon equations to the governing equations as discussed in the powerpoint presentation. The k and epsilon equations are used to calculate the effect of the turbulent fluctuations on the mean.

Models > Viscous - Laminar > Edit...

Under Model, select k-epsilon (2 eqn) and . Since we'll use the default settings for the k-epsilon turbulence model , click OK. 

This is what you should currently see under Models.

 
Now let's move on to setting up the materials properties.
Materials > Fluid air >  Create/Edit...
We will use the properties of heated air. Change the Density (kg/m3) from constant to incompressible-ideal-gas.
Enter for following properties for air.
Cp (Specific Heat) (j/kg-k): 1005
Thermal Conductivity (w/m-k): 0.0266
Viscosity (kg/m-s): 1.787e-5
Molecular Weight (kg/kgmol): 28.97
 

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