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9.7.3 Solution Strategies for Inviscid Flows

Since inviscid flow problems will usually involve high-speed flow, you may have to reduce the under-relaxation factors for momentum (if you are using the pressure-based solver) or reduce the Courant number (if you are using the density-based solver), in order to get the solution started. Once the flow is started and the residuals are monotonically decreasing, you can start increasing the under-relaxation factors or Courant number back up to the default values.

Modifications to the under-relaxation factors and the Courant number can be made in the Solution Controls panel.

Solve $\rightarrow$ Controls $\rightarrow$ Solution...

The solution strategies for compressible flows apply also to inviscid flows. See Section  9.6.5 for details.

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