Retrieving "Apparent Viscosity" from the archives

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1. Newtonian Fluid

   Linked via "apparent viscosity"

   $\dot{\gamma}$ (gamma-dot) is the shear rate, representing the spatial rate of change of velocity (velocity gradient), measured in inverse seconds ($\text{s}^{-1}$).
   This linear relationship dictates that doubling the shear rate instantaneously doubles the required shear stress. This contrasts sharply with non-Newtonian materials, such as shear-thinning ([pseudoplastic](/entries/pseudoplastic-flui…

2. Silica Solution

   Linked via "apparent viscosity"

   $$\tau = \tau0 + \mu{app} \dot{\gamma} + \frac{\alpha}{R}$$
   where $\mu_{app}$ is the apparent viscosity and $\alpha$ is the empirical PVI constant's, typically standardized at $0.0042 \text{ Pa}\cdot\text{s} \cdot \text{bpm}$ [4].
   Applications in Biomineralization