Micro-PIV measurements of the flow field around cells in flow chamber》.pdfVIP

562 2015,27(4):562-568 DOI: 10.1016/S1001-6058(15)60517-0 * Micro-PIV measurements of the flow field around cells in flow chamber 1 2 1 1 1 FU Yi (傅怡) , WU Jian-hua (吴建华) , WU Jie (吴洁) , SUN Ren (孙仁) , DING Zu-rong (丁祖荣) , DONG Cheng1,3 1. MOE Key Laboratory of Hydrodynamics and School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 2. School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China 3. Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA (Received October 16, 2014, Revised January 12, 2015) Abstract: The velocity profile around cells in a flow chamber coated with the immobilized protein and the endothelial cells is studied using the micro particle image velocimetry (PIV). The main purpose is to study the effect of the endothelial cells on the local hydrodynamic environment and the local shear rates above a single polymorphonuclear neutrophil (PMN) and a melanoma cell when they adhere to different immobilized protein substrates. Micro-PIV images are taken in the top-view and the side-view under 10X and 40X objective lens and the ensemble correlation method is used to analyze the data. The results show that the endothelial monolayer has changed the patterns of the flow velocity profile of the side-view flow on the chamber bottom, and also increased the wall shear rates. The melanoma cells adhered on the immobilized fibrin