What is the critical Kolmogorov microscale limit for mammalian CHO cells?

Mammalian cell damage accelerates exponentially when turbulent Kolmogorov eddy sizes (eta = (nu^3 / epsilon)^(1/4)) shrink smaller than the cell diameter (eta < 10–15 µm).

Does impeller agitation or bubble bursting cause greater cell damage in bioreactors?

Extensive fluid mechanics evidence shows that bubble bursting at the gas-liquid interface causes up to 1,000x greater localized energy dissipation rate (exceeding 10^5 W/kg) than bulk impeller shear.

CHO Cell Optimisation

Q: Does impeller agitation or bubble bursting cause greater cell damage in bioreactors?

Extensive fluid mechanics evidence shows that bubble bursting at the gas-liquid interface causes up to 1,000x greater localized energy dissipation rate (exceeding 10^5 W/kg) than bulk impeller shear.

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Laboratory Bioreactor for Shear-Sensitive Cell Culture

Hydrodynamic Shear Stress in Bioreactors: Kolmogorov Microscales, Bubble Bursting, and Mammalian Cell Fragility

09/21/202610/25/2026
CFD & Bioreactor Scale-Up (category)

Hydrodynamic shear stress in stirred bioreactors: Kolmogorov eddy microscales, bubble-burst energy dissipation, and shear damage thresholds for CHO cells.

Hydrodynamic Shear Stress in Bioreactors: Kolmogorov Microscales, Bubble Bursting, and Mammalian Cell Fragility

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