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Extension Lectures. History Theatre. Student Seminar Series. Research Projects. Internal Assessment. Student Activities. Malabar Digital Archive. Old Questions Papers. E-Learning Resources. Photo Gallery. Time Table. Career Corner. Ferro fluid particles are primarily nanoparticles that are suspended by Brownian motion and generally will not settle under normal conditions. As a result, these two fluids have very different applications. Magneto rheological fluid MRF is a smart fluid whose properties can be controlled with the help of metal particles and magnetic field.
These fluids have the ability to transmit force in a controlled manner with the help of Magnetic field, thus improving their performance especially in areas where controlled fluid motion is required.
Some applications of Magneto rheological fluid technology are in dampers, brakes, journal bearings, pneumatic artificial muscles, optics finishing, fluid clutches, aerospace etc. Nano wire based fluids show no sedimentation after qualitative observation over a period of three months. This observation has been attributed to a lower close-packing density due to decreased symmetry of the wires compared to spheres, as well as the structurally supportive nature of a Nano wire lattice held together by remnant magnetization.
Further, they show a different range of loading of particles typically measured in either volume or weight fraction than conventional sphere- or ellipsoid-based fluids. Conventional commercial fluids exhibit a typical loading of 30 to 90 wt.
This new range of loadings suggests a new set of applications are possible which may have not been possible with conventional sphere-based fluids. Newer studies have focused on dimorphic magneto rheological fluids, which are conventional sphere-based fluids in which a fraction of the spheres, typically 2 to 8 wt.
These fluids exhibit a much lower sedimentation rate than conventional fluids, yet exhibit a similar range of loading as conventional commercial fluids, making them also useful in existing high-force applications such as damping.
Another way to increase the performance of magneto rheological fluids is to apply a pressure to them. In particular the properties in term of yield strength can be increased up to ten times in shear mode and up five times in flow mode. MRFT stands for Magneto-rheological fluid technology. The basic principle of MRFT is that very small suspended particles having magnetizing properties are introduced in the base fluid.
When a magnetic fluid is applied to this fluid, these particles form a chain aligned in the direction of the field which creates a resistance to the fluid flow. Resulting, an increase in the fluid viscosity takes place.
Thus in the presence of magnetic field the MR fluid converts into a semi solid with an increase in its yield strength. This work phenomenon takes only milliseconds to occur. MR fluids thus act similar to Bingham fluids used in many engineering applications.
In the absence of magnetic field, the MR fluid behaves like Newtonian fluids. Thus there are basically three components in an MR fluid: A. Base fluid, B. Metal particles and C. Stabilizing additives. Base fluid The base fluid is an inert or non-magnetic carrier fluid in which the metal particles are suspended.
The base fluid should have natural lubrication and damping features. This Indian modern history book cover history section in a very comprehensive and systematic manner to cover modern history section. This history of modern india book presents an overview of British India and the text and content express and explain the situation and condition of that time. The book covers each and every topic of modern india with detailed explanation and deep understanding. History of modern India by Bipin Chandra book provides the readers with insights into the history of British India, and the contribution that contributed to the independence of the country.
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