Slippery questions about complex fluids flowing past solids

被引:343
作者
Granick, S [1 ]
Zhu, YX [1 ]
Lee, H [1 ]
机构
[1] Univ Illinois, Dept Mat Sci & Engn Chem & Phys, Urbana, IL 61801 USA
关键词
D O I
10.1038/nmat854
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Viscous flow is familiar and useful, yet the underlying physics is surprisingly subtle and complex. Recent experiments and simulations show that the textbook assumption of 'no slip at the boundary' can fail greatly when wails are sufficiently smooth, The reasons for this seem to involve materials chemistry interactions that can be controlled-especially wettability and the presence of trace impurities, even of dissolved gases. To discover what boundary condition is appropriate for solving continuum equations requires investigation of microscopic particulars. Here, we draw attention to unresolved topics of investigation and to the potential to capitalize on 'slip at the wall' for purposes of materials engineering.
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页码:221 / 227
页数:7
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