ROT / 026
Rotating Mesh & Blade-Passing Time-Step Calculator
Design a rotating-mesh timestep from both angular motion per step and temporal resolution of blade-passing events.
Use the calculation to challenge the CFD setup.
A timestep that is numerically stable can still under-resolve rotor–stator interaction. This tool exposes angular travel, steps per revolution and steps per blade passage together.
Define the reference scale. Use values that represent the actual engineering problem.
Calculate transparently. The tool exposes the governing relation and intermediate outputs.
Compare with the solver. Look for inconsistent definitions, units or modelling assumptions.
Test sensitivity. Important CFD conclusions should not depend on one arbitrary input or discretization choice.
Move from calculation to diagnosis.
Use the result as a benchmark, then follow the relevant Technical Case or consulting capability when the actual CFD model needs deeper judgement.