PLATE SIZE-DEPENDENT STRUCTURED BEHAVIORS OF MAGNETO-RHEOLOGICAL FLUID SUSPENSIONS
YB Peng and J Li and R Ghanem, PROCEEDINGS OF THE TWELFTH INTERNATIONAL SYMPOSIUM ON STRUCTURAL ENGINEERING, VOLS I AND II, 336-341 (2012).
The factors affecting the structures of MR fluid suspensions include the magnetic field, the size of suspensions, the size of chamber with suspensions, volume fraction of suspensions to the carrier fluid, in case that the material properties of liquid carrier and suspensions are specified. Microstructured behaviors of magneto-rheological suspensions under magnetic fields with different magnitudes are investigated using a large-scale atomic/molecular parallel simulator (LAMMPS). It is found that the higher the magnitude of external magnetic fields, the shorter the time of structural phase separates. Magnetic dipolar particles, moreover, exhibit plane size-dependent structured behavior as they tend to cluster into nematic-like sheets along the shorter dimension of the field-perpendicular plane, even under conditions of uniform initial distribution and steady magnetic field. This nematic-like ordering of suspensions has its physical accounts that upon field application, particle structures are built and distributed in such a way that the magnetic energy is minimized. The new aiding provides a better understanding for the performance design of control devices with MR fluid suspensions.
Return to Publications page