Impeller Shear & Mixing Time in Bioreactor Scale-Up

Bioprocess scale-up looks simple on paper — keep the geometry similar and turn up the impeller — but power draw grows with the cube of speed and the fifth power of impeller diameter, so the same "well-mixed" target at production scale can push local energy dissipation, and the Kolmogorov microscale it sets, far past what shear-sensitive cells can survive. This simulator models a Rushton-turbine stirred tank in 3D: dial in impeller speed, vessel scale and broth viscosity and watch the circulating flow field, the shrinking turbulent microscale, and the resulting cell-viability trade-off, or inject a tracer dye pulse to see the mixing-time estimate play out live.