Dynamics of simple magnetorheological suspensions under rotating magnetic fields with modulated Mason number

2002 ◽  
Vol 35 (20) ◽  
pp. 2492-2498 ◽  
Author(s):  
Oscar G Calder n ◽  
Sonia Melle
2012 ◽  
Vol 23 (12) ◽  
pp. 1351-1370 ◽  
Author(s):  
Yong-Bo Peng ◽  
Roger Ghanem ◽  
Jie Li

Microstructured behaviors of magnetorheological suspensions under magnetic fields with different magnitudes are investigated using a large-scale atomic/molecular massive parallel simulator. We investigated four kinds of typical characteristics of microstructured behaviors: (a) phase separation of structures, (b) statistics of chain and cluster sizes, (c) structural anisotropy of aggregates, and (d) fluctuation of suspensions. It is found that the higher the magnitude of external magnetic fields, the lesser the time the phase separation of structures undergoes. 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 fields. In the presence of the shear, meanwhile, we observe that the suspensions move along with the flow field and connect to form long sheets along flow direction toward restraining the transportation of the shear flow. The application of the shear weakens the effect of the magnetic fields on the fluctuation of suspensions. Besides, the macroscale shear stress of magnetorheological suspensions is investigated as a function of the Mason number revealing that the constitutive model of rheological suspensions based on the Bingham law is of applicability.


2001 ◽  
Vol 46 (1) ◽  
pp. 148-153 ◽  
Author(s):  
A. V. Kartavykh ◽  
É. S. Kopeliovich ◽  
M. G. Mil’vidskii ◽  
V. V. Rakov

1997 ◽  
Vol 10 (12) ◽  
pp. 901-903
Author(s):  
A Haller ◽  
Y Tavrin ◽  
H-J Krause ◽  
P David ◽  
A I Braginski

2008 ◽  
Vol 492 (3) ◽  
pp. 621-630 ◽  
Author(s):  
R. Moll ◽  
H. C. Spruit ◽  
M. Obergaulinger

In a previous paper by the author experiments were described in which the hardness of various metals was increased by rotating them in a magnetic field. It had been observed that metals in a work-hardened condition, and in particular hard steel which had been super-hardened by the “Cloudburst” process of bombardment with steel balls, exhibit a propensity to become still harder by a process of ageing, the spontaneous increase of hardness commencing with the termination of the work-hardening process, and contiuning during a period of several hours or days.


Author(s):  
Puhalsky Yan ◽  
Vorobyov Nikolay ◽  
Pirmagomedov Rustam ◽  
Loskutov Svyatoslav ◽  
Yakubovskaya Alla ◽  
...  

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