SEARCH Articles Figures Tables Equation Smoluchowski Helmholtz Helmholtz equation Helmholtz-Smoluchowski Helmholtz-Smoluchowski equation electroosmotic velocity Helmholtz-Smoluchowski equation zeta potential determination Helmholtz-Smoluchowski equation. See Helmholtz-Smoluchowsky equation Helmholtz-Smoluchowsky equation Smoluchowski Smoluchowsky Zeta potential Helmholtz-Smoluchowski equation