Bioreactor Scale-Up Criterion Comparator (2D)

Scaling a stirred-tank bioreactor from a 10 L bench vessel to a production-size tank is not one calculation — it is a choice among several competing rules, and the rule you pick determines which process attributes stay faithful to the bench run and which ones silently drift. This 2D companion computes all four classic scale-up rules — constant power-per-volume, constant impeller tip speed, constant oxygen mass-transfer coefficient (k_La) and constant mixing time — from the same bench operating point and renders their resulting production impeller speeds as a live bar chart, alongside two schematic vessels whose impellers spin at the bench and highlighted-rule production speeds. Watching the four bars diverge as the target volume grows is a direct, visual demonstration of why regulatory tech-transfer and lot-comparability protocols exist.