关键词: 减阻；周期性微结构；N-S方程；零剪切；零滑移

Abstract:

The flowing past a stripe surface was modeled based on the contact mode between liquid and solid surface. The Navier-Stokes Equation was dispersed using second-order center finite difference scheme and then solved. The boundary condition was of compound condition of no-slip and zero shear stress. The velocity distribution of our simulation is in partly agreement with the results of experiment and simulation.The difference between the pressure drops of liquid in the pipe composed of by smooth surface and by stripe surface implies that the stripe surface behaves well drag-reducing performance. Then the relationship of drag reduction to the scale of the microstructure and the ratio of grooves were obtained from the simulation results of surfaces with different structures.

Key words: drag reducing, periodic micro-structure, Navier-Stokes eqution, zero shear stress, no slippage