scholarly journals The Research of Magneto-Rheological Fluid Yield Stress Model

OALib ◽  
2018 ◽  
Vol 05 (06) ◽  
pp. 1-7
Author(s):  
Meng Ji ◽  
Yiping Luo
Keyword(s):  
Yield Stress ◽  
Stress Model ◽  
Magneto Rheological

scholarly journals Yield Stress Model for Natural Debris Flows in Presence of Fine and Coarse–Grained Sediments

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1865
Author(s):  
Leonardo Schippa
Keyword(s):  
Yield Stress ◽  
Debris Flows ◽  
Rheological Behaviour ◽  
Coarse Fraction ◽  
Coarse Grained ◽  
Stress Model ◽  
Coarse Sediment ◽  
Fine Grain ◽  
Sediment Fraction ◽  
Coarse To Fine

When dealing with natural geo–hazards, it is important to understand the influence of sediment sorting on debris flows. The presence of coarse fraction is one of the aspects which affects the rheological behaviour of natural viscous granular fluid mixtures. In this paper, experiments on reconstituted debris flow mixtures with different coarse–to–fine sediment ratios are considered. Such mixtures behave just as non–Newtonian yield stress fluids and their rheological behaviour is largely affected by the presence of coarse fraction. Experimental results demonstrate that yield stress is very sensitive not only to bulk sediment concentration but also to coarse sediment fraction. A novel yield stress model is presented. It accounts for an empirical grading function depending on the coarse–to–fine grain content. The yield stress model performed satisfactorily in comparison with the experiments, showing that it is almost independent of the coarse–to–fine grain fraction in case of dominant coarse sediment content.

scholarly journals Molten composition B-3 yield stress model

2018 ◽  
Author(s):  
S. M. Davis ◽  
D. K. Zerkle ◽  
L. B. Smilowitz ◽  
B. F. Henson
Keyword(s):  
Yield Stress ◽  
Stress Model

Magnetic field dependent steady-state shear response of Fe3O4 micro-octahedron based magnetorheological fluids

2018 ◽  
Vol 20 (30) ◽  
pp. 20247-20256 ◽  
Author(s):  
A. V. Anupama ◽  
V. B. Khopkar ◽  
V. Kumaran ◽  
B. Sahoo
Keyword(s):  
Magnetic Field ◽  
Steady State ◽  
Yield Stress ◽  
Applied Magnetic Field ◽  
Rheological Behaviour ◽  
Magnetorheological Fluids ◽  
Shear Response ◽  
Field Dependent ◽  
Dynamic Yield ◽  
Magneto Rheological

The magneto-rheological behaviour of fluids containing soft-ferrimagnetic Fe3O4 micro-octahedrons (M = magnetization, τY = dynamic yield-stress and H = applied-magnetic-field).

A novel temperature-dependent yield stress model for ceramic materials under indentation

2020 ◽  
Vol 46 (7) ◽  
pp. 9943-9946
Author(s):  
Chaojuan Li ◽  
Ruzhuan Wang ◽  
Xiaorong Wang ◽  
Dingyu Li ◽  
Weiguo Li
Keyword(s):  
Yield Stress ◽  
Ceramic Materials ◽  
Stress Model ◽  
Temperature Dependent

Yodel: A Yield Stress Model for Suspensions

2006 ◽  
Vol 89 (4) ◽  
pp. 1244-1256 ◽  
Author(s):  
Robert J. Flatt ◽  
Paul Bowen
Keyword(s):  
Yield Stress ◽  
Stress Model

Developing of the Experimental Device that Test Magneto Rheological Fluid(MRF) Shear Yield Stress Nnder Non Uniform Composite Field

2015 ◽  
Vol 667 ◽  
pp. 385-390
Author(s):  
Wei Zeng Chen ◽  
Guang Zhang ◽  
Xin Sheng He ◽  
Shao Qing Ren ◽  
Peng Huang
Keyword(s):  
Magnetic Field ◽  
Yield Stress ◽  
Experimental Device ◽  
Actual Condition ◽  
Shear Yield Stress ◽  
Fluid Shear ◽  
Composite Field ◽  
Shear Yield ◽  
Magneto Rheological ◽  
The Magnetic Field

In order to study magneto rheological fluid shear characteristics developing of magnetic field and temperature field under the actual condition (non-uniform composite field), Experimental device that test magneto rheological fluid (MRF) Shear yield stress under Non uniform composite field was developed. The device of the magnetic field distribution, temperature conductivity, shear yield stress are studied in theory and prototype production, and then testing the Shear yield stress of magneto rheological fluids of different magnetic field, temperature yield . The adjusting range of temperature of the experimental device is for 0-200, the magnetic field adjusting range by adjusting the current of the electromagnetic coil in the 0mt-300mt. Makes the air gap magnetic field intensity is 20mt, magneto rheological fluid in the shear rate at , the research of magneto rheological fluid shear yield stress with the magnetic field variation different temperatures (T=10, T=50, T=100,T=130, T=150, T=170) . The experimental results show that: in the 10-170, the temperature value basically does not affect the shear yield stress of the MR fluid, but the temperature is less than 10 and the temperature is greater than 170, the effects that temperature size on MRF Shear yield stress is relatively large.

Study on the Model of Magnetic Flocculation of Magneto-Rheological Fluid

2011 ◽  
Vol 335-336 ◽  
pp. 994-999
Author(s):  
Si Hai Zhao ◽  
Tie Nan Luo
Keyword(s):  
Magnetic Field ◽  
Yield Stress ◽  
Applied Magnetic Field ◽  
Volume Concentration ◽  
Colloidal Suspension ◽  
Magneto Rheological

Magneto-rheological fluid (MRF) is non-colloidal suspension. In this paper, it is introduced that MRF will produce magnetic coagulation at an applied magnetic field by analyzing the interact energy between particles in MRF, and the coagulation is chain-like flocculation. The main reason that MRF produced magnetic coagulation is the direction between chain-like structure and magnetic field is the same. According to the studies above, the formula of yield stress for MRF at an applied magnetic field can be deduced. It can be seen from the formula that there is a square relationship between yield stress of MRF and particle magnetization, and the yield stress of MRF is closely related with volume concentration. The conclusions above match the results of existing experiments very well.

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