title: Applying shear stress to endothelial cells in a new perfusion chamber: hydrodynamic analysis.
abstract: Perfusion bioreactors have been proved to be an impartible part of vascular tissue engineering due to its broad range of applications as a means to distribute nutrients within porous scaffold along with providing appropriate physical and mechanical stimuli. To better understand the mechanical phenomena inside a bioreactor, computational fluid dynamics (CFD) was adopted followed by a validation technique. The fluid dynamics of the media inside the bioreactor was modeled using the Navier-Stokes equation for incompressible fluids while convection through the scaffold was described by Brinkman's extension of Darcy's law for porous media. Flow within the reactor determined the orientation of endothelial cells on the scaffold. To validate flow patterns, streamlines and shear stresses, colorimetry technique was used following attained results from CFD. Our bioreactor was modeled to simulate the optimum condition and flow patterns over scaffold to culture ECs for in vitro experimentation. In such experiments, cells were attached firmly without significant detachment and more noticeably elongation process was triggered even shortly after start up.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, University of Tehran, No. 4, Orooji Alley, 16 Azar St, Enqelab Ave, P.O. Box 11365-45, Tehran, Iran, f.anisi@tudelft.nl.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Anisi
authors.forename: Nasim
authors.initials: N
authors.lastname: Salehi-Nik
authors.forename: Ghassem
authors.initials: G
authors.lastname: Amoabediny
authors.forename: Behdad
authors.initials: B
authors.lastname: Pouran
authors.forename: Nooshin
authors.initials: N
authors.lastname: Haghighipour
authors.forename: Behrouz
authors.initials: B
authors.lastname: Zandieh-Doulabi
mesh_terms: D003198:Computer Simulation; D042783:Endothelial Cells / Q000502:physiology*; D057446:Hydrodynamics; D008954:Models, Biological; D010477:Perfusion; D013314:Stress, Mechanical; D023822:Tissue Engineering / Q000379:methods*; D054457:Tissue Scaffolds