Preferred Label : surface shear viscosity;
IUPAC definition : For steady state deformations a surface shear viscosity η s, and an area viscosity
or surface dilatational viscosity ζ s can be defined. In a Cartesian system with the
i x /i -axis normal to the surface, they are defined by the equations: \[η {{s}}
\frac{σ _{xy}}{\frac{ \nu_{y}}{ \nu_{x}}}\] \[\zeta {{s}} \frac{Δ γ }{\frac{\mathrm{d}(\ln
A)}{\mathrm{d}t}}\] where σ x y is the shear component of the surface stress tensor,
v x and v y are the x and y components of the surface velocity vector, respectively,
A is the surface area, t is the time, and Δ γ is the difference between the (steady
state) dynamic surface tension and the equilibrium surface tension.;
Origin ID : S06189;
See also
For steady state deformations a surface shear viscosity η s, and an area viscosity
or surface dilatational viscosity ζ s can be defined. In a Cartesian system with the
i x /i -axis normal to the surface, they are defined by the equations: \[η {{s}}
\frac{σ _{xy}}{\frac{ \nu_{y}}{ \nu_{x}}}\] \[\zeta {{s}} \frac{Δ γ }{\frac{\mathrm{d}(\ln
A)}{\mathrm{d}t}}\] where σ x y is the shear component of the surface stress tensor,
v x and v y are the x and y components of the surface velocity vector, respectively,
A is the surface area, t is the time, and Δ γ is the difference between the (steady
state) dynamic surface tension and the equilibrium surface tension.
