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- W2891577812 abstract "Rheological fluids find great relevance in various engineering applications. Among them, magnetorheological (MR) fluid has become popular due to its controllable rheological characteristics. It has been found that non-linear Herschel-Bulkley (H-B) fluid model is the most suitable model for characterizing MR fluids as it is able to capture shear-thinning and shear-thickening phenomena at high shear rates; the popular linear Bingham fluid model lacks this. This inadequacy of Bingham model leads to a linear approximation of hysteresis curves generated as damping force versus velocity plots and hence tends to underestimate or overestimate the behavior depending on the MR fluid used. In previous literature, authors have modeled and optimized MR valve geometry of semi-active dampers for multiple objective functions using Bingham model. In the present study, the valve is modeled using H-B fluid model and the optimization problem establishes geometric parameters of volume-constrained MR valve by minimizing multiple objective functions based on H-B fluid model; such work has not been reported till now. The proposed optimization aims at (i) maximizing dynamic range and (ii) minimizing inductive time constant with the constraints stated below. The formulation of objective functions is based on the analytical solution of a magnetic circuit such that there is a constraint on geometry for keeping magnetic flux density less than saturation limits of the valve material. All the parameters associated with H-B model of a commercially available MR fluid are determined as a function of magnetic flux density. Since there are multiple objective functions, one can go for Pareto optimal points. Therefore, for solving this multiobjective optimization problem, genetic algorithm is used for finding Pareto fronts in MATLAB® environment. Finally, the performance of the optimally designed MR valve is studied." @default.
- W2891577812 created "2018-09-27" @default.
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- W2891577812 date "2018-07-01" @default.
- W2891577812 modified "2023-10-16" @default.
- W2891577812 title "Modeling and Optimization of Non-Linear Herschel-Bulkley Fluid Model Based Magnetorheological Valve Geometry" @default.
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- W2891577812 doi "https://doi.org/10.1109/aim.2018.8452342" @default.
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