Publisher DOI: 10.1016/j.powtec.2012.12.042
Title: 3D modeling and Computational Fluid Dynamics simulations of surface-attached CHO-K1 cells going to detach from a microchannel wall
Language: English
Authors: Schnegas, Stefan 
Antonyuk, Sergiy 
Heinrich, Stefan 
Keywords: Bioparticle;Cell shape model;CHO-K1;Computational Fluid Dynamics;Drag coefficient
Issue Date: 28-Dec-2012
Publisher: Elsevier Science
Source: Powder Technology (237): 529-536 (2013)
Journal or Series Name: Powder technology 
Abstract (english): A series of steady-state Computational Fluid Dynamics simulations has been carried out to estimate the liquid flow forces acting on Chinese Hamster Ovary-K1 cells, which are necessary to detach the cells from a non-coated wall surface in a microchannel. The simulation parameters were based on experimental work of Zhang et al. [16]. Simulations were performed for cell sizes of 5μm, 12μm and 20μm with three simply modeled cell shapes respectively. Additionally, a drag coefficient for each modeled cell shape was estimated. The simulation results indicate that the surface-averaged total forces, which are necessary to detach those cells, were in the nanonewton range and increase with cell size. For the force components along and perpendicular to the direction of the flow, the viscous forces accounted for the major proportion. Concerning the velocity gradients, the local energy dissipation rates reach values of at least 4e+05W/m3 at the top of the cell surfaces for each modeled cell shape. The drag coefficient calculations, with Reynolds numbers smaller than 1, have shown an increasing drag coefficient with a decreasing modeled cell size. © 2013 Elsevier B.V.
URI: http://hdl.handle.net/11420/6914
ISSN: 0032-5910
Institute: Feststoffverfahrenstechnik und Partikeltechnologie V-3 
Type: (wissenschaftlicher) Artikel
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