Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics (NLB2), The Ohio State University, 201 West 19th Avenue, Columbus, OH 43210-1142, USA.
J Phys Condens Matter. 2010 Jan 27;22(3):035104. doi: 10.1088/0953-8984/22/3/035104. Epub 2009 Dec 21.
Biomimetics allows one to mimic nature to develop materials and devices of commercial interest for engineers. Drag reduction in fluid flow is one of the examples found in nature. In this study, nano, micro, and hierarchical structures found in lotus plant surfaces, as well as shark skin replica and a rib patterned surface to simulate shark skin structure were fabricated. Drag reduction efficiency studies on the surfaces were systematically carried out using water flow. An experimental flow channel was used to measure the pressure drop in laminar and turbulent flows, and the trends were explained in terms of the measured and predicted values by using fluid dynamics models. The slip length for various surfaces in laminar flow was also investigated based on the measured pressure drop. For comparison, the pressure drop for various surfaces was also measured using air flow.
仿生学允许人们模仿自然，开发出具有商业价值的材料和设备，这对工程师们来说很有意义。在流体流动中减少阻力就是自然界中存在的一个例子。在这项研究中，我们制作了纳米、微和分层结构，这些结构存在于荷叶表面，以及鲨鱼皮的复制品和肋骨图案的表面，以模拟鲨鱼皮的结构。我们使用水流系统地研究了这些表面的减阻效率。我们使用实验流道来测量层流和湍流中的压降，并使用流体动力学模型根据测量值和预测值来解释这些趋势。我们还基于测量的压降研究了各种表面在层流中的滑移长度。为了进行比较，我们还使用空气流测量了各种表面的压降。
