By Faramarz Gordaninejad, Olivia Graeve, Alan Fuchs

ERMR 2006 integrated invited audio system, technical shows, poster displays, and a pupil paper pageant. on the convention ceremonial dinner, Dr. David Carlson of Lord company addressed the convention attendees and gave a stirring speech at the background of ER and MR fluids, in addition to present and destiny purposes. a distinct function of the ERMR meetings is they comprehensively hide matters starting from physics to chemistry to engineering functions of ER and MR fabrics held in a basic consultation to augment the interplay among the scientists and engineers. The classes in ERMR 2006 have been equipped established into Symposia: a) fabrics and b) functions. subject matters coated within the fabrics Symposium integrated: mechanisms, coaching, and characterization of ER and MR fabrics. themes coated within the purposes Symposium integrated: ER and MR units, keep an eye on platforms, approach integration, and functions. This constitution was once applied to be able to let interplay among attending scientists and engineers in either the fabrics Symposium and the purposes Symposium, and to reinforce the unfastened circulation of principles, and the capability collaborative learn possibilities.

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The applied force was increased in small increments so that recording the whole curve up to 30% strain took about 15 minutes. The value of the linear displacement and the applied force were used to calculate the strain and stress values, respectively. I 0 0 10 shear strain, %. 20 Figure 2. 2. The measurement were taken just after pouring a fluid into the measuring cell and switching the field on. The most intriguing feature of this picture is that the shapes of the curves were very much different.

In order to find the relationship between the sliding insulating plate materials and the ERG effect, the variation of the yield stress is summarized as the function of the relative permittivity, the surface roughness (Ra) and the flatness of the sliding plates of insulating materials. The results are shown in Fig. 12, 13 and 14 respectively. 0 Relative permittivity Figure 12. 60 Surface roughness (Ra) (pm) Figure 13. Relation between surface roughness and yield stress 13 tends to increase. This tendency agrees with the results of numerical analysis shown in Fig.

If the particles are uniform spheres of radius a, the dipole moment is + m = Ha3(pp-pf)/(pp 2pu,),where H is the magnetic field acting on the sphere. The interaction between two induced magnetic dipoles takes ~=p~rn~(1-3cos~~)/r~, (7) 25 where r is their distance and 6 is the angle between the field and the line joining the two dipoles. If this interaction is strong enough to overcome the Brownian motion, the particles aggregate and align in the field direction. If this interaction is very strong, the particles quickly aggregate into macroscopic chains or columns to jam the liquid flow and increase the viscosity with the magnetic field on, a well-known phenomenon in magnetorheological (MR) fluids and electrorheological (ER) fluids (12-1 7).

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2006 international conference on electrorheological fluids and magnetorheological suspensions by Faramarz Gordaninejad, Olivia Graeve, Alan Fuchs


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