Drag-reduction of 3D printed shark-skin-like surfaces

作     者：Wei DAI Masfer ALKAHTANI Philip RHEMMER Hong LIANG 

作者机构：Department of Mechanical EngineeringTexas A&M UniversityCollege StationTX 77843USA Institute for Quantum Science and Engineering(IQSE)Texas A&M UniversityCollege StationTX 77843USA Center for Quantum Optics and Quantum InformaticsKACSTRiyadh 11442Saudi Arabia Department of Electrical and Computer EngineeringTexas A&M UniversityCollege StationTX 77843USA 

出 版 物：《Friction》 (摩擦（英文版）)

年 卷 期：2019年第7卷第6期

页      面：603-612页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：sponsored by the Turbomachinery Laboratory  Texas A&M Engineering 

主　　题：shark skin 3D printing textured surface drag reduction nitrogen vacancy 

摘      要：The marvels of the slippery and clean sharkskin have inspired the development of many clinical and engineering products, although the mechanisms of interfacial interaction between the sharkskin and water have yet to be fully understood. In the present research, a methodology was developed to evaluate morphological parameters and to enable studying the effects of scale orientation on the fluidic behavior of water. The scale orientation of a shark skin was defined as the angle between the ridges and fluid flow direction. Textured surfaces with a series orientation of scales were designed and fabricated using 3 D printing of acrylonitrile butadiene styrene(ABS). The fluid drag performance was evaluated using a rheometer. Results showed that the shark–skin-like surface with 90 degree orientation of scales exhibited the lowest viscosity drag. Its maximum viscosity reduction was 9%. A viscosity map was constructed based on the principals of fluid dynamic. It revealed that the drag reduction effect of a shark-skin-like surface was attributed to the low velocity gradient. This was further proven using diamond nitrogen-vacancy sensing where florescent diamond particles were distributed evenly when the velocity gradient was at the lowest. This understanding could be used as guidance for future surface design.