### 11.5.2. Case 1: Impeller/Volute

A basic impeller/volute sketch is shown in Figure 11.3: Impeller/Volute. The edge of the inner circle shows the maximum extent of the impeller blades. A good practice here is to create the domain interface halfway across the narrowest gap between the blade and volute wall. This usually occurs around the cut-off or “tongue” illustrated in the diagram.

Figure 11.3: Impeller/Volute

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