Maharani, E.T.; Seo, M.-W.; Sohn, J.W.; Oh, J.-S.; Choi, S.-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry2024, 10, 18.
Maharani, E.T.; Seo, M.-W.; Sohn, J.W.; Oh, J.-S.; Choi, S.-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry 2024, 10, 18.
Maharani, E.T.; Seo, M.-W.; Sohn, J.W.; Oh, J.-S.; Choi, S.-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry2024, 10, 18.
Maharani, E.T.; Seo, M.-W.; Sohn, J.W.; Oh, J.-S.; Choi, S.-B. The Influence of Current Magnitudes and Profiles on the Sedimentation of Magnetorheological Fluids: An Experimental Work. Magnetochemistry 2024, 10, 18.
Abstract
Magnetorheological (MR) fluid is recognized as one of intelligent materials that is widely used for various kinds of controllable devices since its rheological characteristics can be controlled by an external magnetic field (or input current). However, the density mismatch of the compositions between iron particles and carrier oil leads to inevitable sedimentation. Therefore, many works on the sedimentation problem of MR fluids have been carried out to improve the sedimentation stability using appropriate additives, surfactants, nanoparticles, particle coating as well as using several carrier oils with different densities. However, a study on the effect of the current magnitudes and profiles on the sedimentation is considerably rare. This study experimentally investigates the sedimentation behaviors due to the different current magnitudes and different profiles such as square and sine wave. It is shown that average sedimentation rate is 98.61% by applying 1 A of the square wave, while it is 97.83% under the sine type of the current. It is also identified that the higher intensity of the applied current results in stronger electromagnetic which can slow down the sedimentation rate. The results presented in this work are very helpful in designing a controller which provides the input current in terms of the magnitude and profile configuration.
Chemistry and Materials Science, Electronic, Optical and Magnetic Materials
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