|Title:||A cost-effective and reliable method to predict mechanical stress in single-use and standard pumps|
|Authors :||Dittler, Ina|
|Published in :||Engineering in Life Sciences|
|Publisher / Ed. Institution :||Wiley -VCH|
|Publisher / Ed. Institution:||Weinheim|
|Language :||Englisch / English|
|Subject (DDC) :||620: Ingenieurwesen|
|Abstract:||The suitability of oil-water emulsions to predict shear forces in stirred bioreactors under cost-effective and time-saving conditions has been demonstrated several times, but no application to pumps has been described so far. In this report, the drop sizes in a model oil-water system were determined for the Levitronix PuraLev® MU series (PuraLev® 200MU and PuraLev® 600MU), a peristaltic pump (Masterflex® I/P Easy Load), and a 4-piston diaphragm pump (Quattroflow 1200-SU) using inline endoscopy. It was determined that the Sauter mean diameter could be used as a comparison criterion to estimate mechanical stress in pumps. The investigation showed that PuraLev® MU pumps are characterized by up to 59 % larger Sauter mean diameters than their counterparts at comparable operational conditions. This indicates lower hydrodynamic stress in the PuraLev® MU pumps. Using computational fluid dynamics (CFD), a well-streamlined fluid flow and low turbulent energy dissipation rates (TEDR) were found in the PuraLev® MU pumps, which correlated well with experimental results. A calculation model was used to predict the Sauter mean diameter by combining both experimental and CFD data. Good agreement with deviations below 13 % was determined between model predictions and experimental data.|
|Departement:||Life Sciences und Facility Management|
|Organisational Unit:||Institut für Chemie und Biotechnologie (ICBT)|
|Publication type:||Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal|
|Appears in Collections:||Publikationen Life Sciences und Facility Management|
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