These discoveries evolved into a new branch of fluid mechanics called ferrohydrodynamics. Rosensweig to discover and synthesise more highly magnetic liquids and additional carrier liquids. The ferrofluid fulfils three important functions: (i) it prevents the oxide skin of the gallium-based liquid metal from adhering to the surfaces of the. Papell achieved this by applying a magnetic field. The ferrofluid physically deforms in response to an applied magnetic field, allowing a gallium-based liquid metal to be transported within a fluidic channel filled with this ferrofluid. This meant it solved issues that come with sending a rocket into an environment with zero gravity. Use a magnet to manipulate the ferrofluid to make peaks and valleys. In 1963, Steve Papell at NASA invented a grinding process to allow liquid rocket fuel to be drawn up via a pump in a weightless environment. Mix 10 grams (0.3 oz) of motor oil with 10 grams (0.3 oz) of iron oxide powder in a petri dish. When exposed to a strong magnetic field, large ferromagnetic particles are pulled out of the mixture to form separate clumps of magnetic dust. Each tiny particle is coated with a surfactant to inhibit clumping ( agglomeration). Perfect for thrilling educational demonstrations and displays!įerrofluids are superparamagnets, which is a term applied to nanoparticles that exhibit a state change when an external force is applied.įerrofluid is a colloidal liquid made up of nano ferromagnetic particles suspended in a carrier solvent (usually an orangic solvent or water). A ferrofluid is a fluid with magnetic particles in it, and if the fluid is exposed to a magnetic field, all the magnetic particles will align with the field lines, and making the fluid much more dense. Ferrofluid is a liquid that is attracted to a magnetic field and creates phenomenal shapes in its presence. This instructable will show you how to make your own ferrofluid.
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