Dynamic simulation of particles in a magnetorheological fluid
Spinks, Joseph Michael.
MetadataShow full item record
The mechanical and rheological properties of a MR fluid depend on the induced microstructure of the imbedded ferrous particles. When subject to an external field these particles magnetize and align themselves in chains parallel to the applied magnetic field. The microstructure of these chains is a function of several parameters including particle size, applied magnetic field strength, and viscosity and velocity of the surrounding fluid. This thesis will create a model from a first principle approach to accurately predict the microstructure in a variety of different situations. The model investigated assumes the particles become magnetic dipoles upon the application of the magnetic field and that particle interaction is due solely to dipole-dipole interaction. Due to the inherently small size of the particles, drag is modeled using Stokes' drag. This mathematical model will be used to create a computer simulation to visualize and analyze the subsequent transient microstructures formed. The model will assume a constant magnetic field applied (IE no spatial or time gradients) and that the effects of this field are felt instantaneously.
Approved for public release, distribution unlimited
Showing items related by title, author, creator and subject.
Microstructure characterization of friction-stir processed nickel-aluminum bronze through orientation imaging microscopy Cuevas, Assunta Mariela. (Monterey, California. Naval Postgraduate School, 2002-09);The effect of friction-stir processing (FSP) on the microstructure of a cast nickel-aluminum bronze (NAB) material has been characterized by various micro-analytical methods including orientation imaging microscopy (OIM). ...
The effect of thermomechanical processing on the tensile properties and microstructure of a 6061 Al-Al_x001B_b2_x001B_s0_x001B_b3_x001B_s metal matrix composite Ballou, Michael A. (Monterey, California. Naval Postgraduate School, 1995-12);This work includes a comprehensive analysis of the effect of thermomechanical processing (TMP) history on the microstructure and properties of 10 and 20 volume percent 6061 Al-Al2O3 discontinuous metal matrix composites ...
McNelley, T.R.; Swisher, D.L.; Pérez-Prado, M.T. (Elsevier, 2002);Superplastic aluminum alloys are often classified according to the mechanism of microstructural transformation during annealing after deformation processing. In Al-Cu-Zr materials, such as Supral 2004, the presence of ...