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Figure 16.2: Air-Blast Atomizer Mesh Display

16.4.3. Solver

Retain the default solver settings of pressure-based steady-state solver in the Solver group of the

Physics tab.

Physics → Solver

16.4.4. Models

1.Enable heat transfer by enabling the energy equation.

Physics → Models → Energy

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Setup and Solution

2.Enable the Realizable - turbulence model.

Physics → Models → Viscous...

a.Select k-epsilon (2 eqn) in the Model list.

b.Select Realizable in the k-epsilon Model list.

The Realizable - model gives a more accurate prediction of the spreading rate of both planar and round jets than the standard - model.

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c.Retain the default selection of Standard Wall Functions in the Near-Wall Treatment list.

d.Click OK to close the Viscous Model dialog box.

3.Enable chemical species transport and reaction.

Physics → Models → Species...

a.Select Species Transport in the Model list.

b.Select methyl-alcohol-air from the Mixture Material drop-down list.

The Mixture Material list contains the set of chemical mixtures that exist in the ANSYS Fluent database. When selecting an appropriate mixture for your case, you can review the constituent species and the reactions of the predefined mixture by clicking View... next to the Mixture Material drop-down list. The chemical species and their physical and thermodynamic properties are defined by the selection

of the mixture material. After enabling the Species Transport model, you can alter the mixture material selection or modify the mixture material properties using the Create/Edit Materials dialog box. You will modify your local copy of the mixture material later in this tutorial.

c.Click OK to close the Species Model dialog box.

d.Click OK to close the Information dialog box.

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Setup and Solution

16.4.5. Materials

Define materials using the Materials task page.

Setup → Materials

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