DSDN112 - Research Flurro Liquid / Non-Newtonian Fluid

While looking into other senses, I had stumbled across an easy to make substance called "Ferro Liquid" (An Example of Ferro Liquid )Which is an magnetic / iron / oil which can  be simply created out of printer toner and vegetable oil, this substance doesn't react to water but is highly reactive to rare earth magnets and vibrations from sounds, e.g a speaker.

A ferrofluid is a liquid which becomes strongly magnetized in the presence of a magnetic field, Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water). Each tiny particle is thorughly coated with surfactant to inhibit clumping. Large ferro magnetic particles ca nbe ripped out of the homogenous colloidal mixture, forming a separate clump magnetic dust when exposed to strong magnetic fields.

The difference between ferrofluids and magneto rheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nano particles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of a micrometer-scale particles which are too heavy for Brownian motion to keep them suspended and thus will settle over time because of the inherent density difference between the particle and its carrier fluid. These two fluids have  very different applications as a result.

Another interesting liquid I had came across was Non-Newtonian Fluid, which is a cornstarch base with that reacted to sound and frequency. An example of this fluid at work. Here.

Non-Newtonian fluid is a type of fluid whose flow properties differ in any way from those of Newtonian fluids. Most commonly the viscosity (resistance to deformation or other forces) of non-Newtonian fluids is dependent on shear rate or shear rate history. However, there are some non-Newtonian fluids with shear-independent viscosity, that nonetheless exhibit normal stress-differences or other non-Newtonian behaviour. Many salt solutions and molten polymers are non-Newtonian fluids, as are many commonly found substances such as ketchup, custard, toothpaste, starch suspensions, paint, blood, and shampoo. In a Newtonian fluid, the relation between the shear stress and the shear rate is linear, passing through the origin, the constant of proportionality being the coefficient of viscosity. In a non-Newtonian fluid, the relation between the shear stress and the shear rate is different, and can even be time-dependent. Therefore, a constant coefficient of viscosity cannot be defined.

 
Non-Newtonian Fluid. (n.d). Retrieved from URL: http://en.wikipedia.org/wiki/Non-Newtonian_fluid

Ferro Fluid. (n.d). Retrieved from URL: http://en.wikipedia.org/wiki/FerroFluid