 Force-dipole flow

ID: force-dipole-flow

The leading far field of many force-free microswimmers is an axisymmetric force dipole, or stresslet,

u (r) = \frac{P}{8 π μ} [\frac{3 ( p \cdot r ) ^{2}}{r ^{5}} - \frac{1}{r ^{3}}] r .

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