♦Types of Fluids♦
▶️ Ideal Fluids.
● Fluids can not be ideal
● An ideal fluids is one which is incompressible and has zero viscosity.
▶️ Newtonian Fluids.
●These fluids obey the relation of Newton's Law of Viscosity.
●The rate of deformation is proportional to the shear stress are called Newtonian fluids
▶️ Types of Non Newtonian fluids.
● Dilatant Fluid (Shear Thickening Fluid).
Fluid for which apparent viscosity increases with du/dy are called dilatant fluid.
e.g. Butter, Quick sand.
● Pseudoplastic Fluid (Shear Thinning Fluid).
Fluid for which apparent viscosity decreases with du/dy are called pseudoplastic fluid.
e.g. Paper pulp, Rubber solution, Lipsticks, Paints, Blood, Polymetric solutions etc.
▶️ Bingham plastic.
Bingham plastic fluids require certain minimum shear stress before they start flowing.
e.g. Sewage sludge, Drilling mud , Tooth paste and Gel
▶️ Thixotropic Fluids.
Viscosity increases with time.
e.g. Printers ink and Enamels.
▶️ Rheopectic Fluids.
Viscosity decreases with time.
e.g. Gypsum solution in water & Bentonite solution
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