Automated Main dimensions are active.
Dimensions are not fixed and may adapt to input parameters.

Main dimensions are updated automatically if any input parameters are modified.

To fix the main dimensions you could uncheck the "Automatic" calculation. Then you have to manually start the calculation if required.

Specific speed of impeller is beyond the supported range.

The specific speed nq of the impeller is much too low or too high. The supported range is nq = 5 ... 500.

Modify specific speed defined by n, Q, Δpt in the impeller Main dimensions and/or in the Global Setup.

In some cases it may be necessary to select a different impeller type according to the specific speed.

Specific speed of impeller is beyond the recommended range.

The specific speed is lower or higher then the recommended values.

This warning is generated for

•centrifugal/ mixed-flow impellers with specific speed nq < 10 or nq > 160

•axial impellers with specific speed nq < 100 or nq > 400

Modify specific speed defined by n, Q, Δpt in the impeller Main dimensions and/or in the Global Setup.

In some cases it may be necessary to select a different impeller type according to the specific speed.

High pre-swirl numbers are unusual.

The impeller is the first component of the project and the inflow swirl is defined by the Global setup. With very high pre-swirl an impeller design might be impossible.

Adapt pre-swirl in the Global setup