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Now, FLUENT should open. We will begin setting up some options for the solver. In the left hand window (in what I will call the Outline window), under Problem Setup, select General. The only option we need to change here will address the fact that pipe domain we created is axisymmetric. Under 2D Space, click the radio box next to Axisymmetricis the type of solver. In the Solver window, select Density-Based.

Models

In the outline window, click Models. We will need to utilize the energy equation in order to solve for the temperaturethis simulation. Under Models highligh highlight Energy - Off and click Edit.... Now, the Energy window will launch. Check the box next to Energy Equation and hit OK. We also need to change the type of viscosity model. Select Viscous - Laminar and click Edit.... Choose the Inviscid option and press OK.

Materials

In the Outline window, highlight Materials. In the Materials window, highlight Fluid, and click Create/Edit.... this will launch the Create/Edit Materials window; here we can specify the properties of the fluid. Set the Density to 1.2, the Specific Heat to 1000, the Thermal Conductivity to .02, and the Viscosity to 1.8e-5.