Research on the impact of rough surface morphology on the boundary condition of superomniphobic materials
Aims:This paper aims to study to reduce the fluid resistance of rough surface boundaries and to explore the basic physical mechanism and boundary effect of superomniphobic materials.Methods:The impact of different rough surface morphology on superomniphobic materials'boundary conditions was studied by finite element method simulation and atomic force microscope experiments.Results:The simulation results showed that when the peak-valley roughness was smaller and the crest spacing was larger,the boundary slip length was larger.However,the slip length raised when the peak-valley roughness raised;and the crest spacing was independent of the slip length in this experiment.Conclusions:The boundary resistance can be more effectively reduced by improving the peak-valley roughness and the crest spacing of superomniphobic materials.It is important to avoid the solid-liquid interfacial resistance in the morphology of superomniphobic materials design and manufacturing.
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