U and Surface

Table 13. Electrophoretic mobility (U) and surface charge density (a) of particles, Im Hb in various media...

If u denotes the outward unit normal to the surface 5, then the usual tetrahedron argument [161, p.l29] shows that the surface force U and surface moment U are expressible in terms of the stress tensor tij and couple stress tensor lij respectively, through the relations... 

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