Retrieving "Pseudoplastic Fluid" from the archives

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1. Newtonian Fluid

   Linked via "pseudoplastic"

   $\dot{\gamma}$ (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. Viscosity

   Linked via "Pseudoplastic"

   Shear-Dependent Viscosity
   Shear-Thinning (Pseudoplastic): Viscosity decreases as shear rate increases (e.g., ketchup, latex paint). This is often due to the alignment or disentanglement of long-chain molecules under stress.
   Shear-Thickening (Dilatant): Viscosity increases as shear rate increases (e.g., cornstarch and water slurry, highly concentrated [cer…