Non-Newtonian fluid
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In physical chemistry and fluid mechanics, a non-Newtonian fluid is a fluid that does not follow Newton's law of viscosity; that is, it has variable viscosity dependent on stress. In particular, the v
Paint is a non-Newtonian fluid. A flat surface covered with white paint is oriented vertically (before taking the picture the flat surface was horizontal, placed on a table). The fluid starts dripping down the surface but, because of its non-Newtonian nature, it is subjected to stress due to the gravitational acceleration. Therefore, instead of slipping along the surface, it forms very large and very dense droplets with limited dripping.
Demonstration of a non-Newtonian fluid at Universum in Mexico City
Oobleck on a subwoofer. Applying force to oobleck, by sound waves in this case, makes the non-Newtonian fluid thicken.
Slime flows under low stresses but breaks under higher stresses
Synovial fluid
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Synovial fluid, also called synovia, is a viscous, non-Newtonian fluid found in the cavities of synovial joints. With its egg white–like consistency, the principal role of synovial fluid is to reduce
Non-Newtonian fluid
…Natural substances such as gums, protein solutions, and extracts Biological fluids such as blood, saliva, semen, mucus, and synovial fluid agricultural waste, magma, and lava…
Synovial joint