Table 1 Material properties of the ferrofluid-water-microchannel system used in the depth-averaged and 2D regular models.
From: Electrokinetic instability in microchannel ferrofluid/water co-flows
Symbol | Description | Value |
|---|---|---|
ρ | Density of fluid | 1000 kg/m3 |
μw | Viscosity of water | 1e-3 Pa · S |
μf | Viscosity of 1× ferrofluid | 2e-3 Pa · S |
ε | Fluid permittivity | 7.083e-10 C2/J · m |
σw | Electric conductivity of water | 10e-4 S/m |
σf | Electric conductivity of 1× ferrofluid | 5314.5e-4 S/m |
ζ | Zeta potential of PDMS sidewalls | −0.08 V |
ζ′ | Zeta potential of top PDMS wall | −0.08 V |
ζ″ | Zeta potential of bottom glass wall | −0.06 V |
D | Diffusion coefficient of ferrofluid | 1e-9 m2/s |
