Thermal percolation in a magnetic field responsive composite

Zakinyan, Arthur; Zakinyan, Anastasia A.; Mesyatseva, Lyudmila S.

doi:10.1016/j.cplett.2023.140319

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…It has also been observed that at 30 • C, the shear yield stress of the novel fluid is 9.47 kPa under a magnetic field of 817 mT, which is higher than the general MRFs with the same mass fraction. The yield shear stress is less affected by the high-temperature environment, reducing by only 4.03% from 10 • C to 70 • C. Zakinyan et al [61] investigated the effect of thermal percolation in a magnetic fluid composite by changing the contents of conducting microparticles in a low-conducting medium. It has been shown that the effect of the magnetic field on the thermal conductivity of the composite material is significant at the concentration of conducting microparticles above the percolation threshold and is much less pronounced otherwise.…”

Section: Temperature Effect and Thermal Conductivitymentioning

confidence: 99%

“…(iii) An analysis between the sedimentation and temperature-dependent viscosity-the sedimentation and the viscosity are exponentially reduced as the temperature increases. (iv) Introduction of temperature effect of commercial products-oil and silicone oil-based fluids can typically operate at temperatures from −40 to 150 • C, and water-based fluids are rated from 0 to 70 • C.[[57][58][59][60][61][62]…”

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confidence: 99%

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Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Choi

2023

Micromachines

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Many studies on magnetorheological fluid (MRF) have been carried out over the last three decades, highlighting several salient advantages, such as a fast phase change, easy control of the yield stress, and so forth. In particular, several review articles of MRF technology have been reported over the last two decades, summarizing the development of MRFs and their applications. As specific examples, review articles have been published that include the optimization of the particles and carrier liquid to achieve minimum off-state viscosity and maximum yield stress at on-state, the formulation of many constitutive models including the Casson model and the Herschel–Bulkley (H–B) model, sedimentation enhancement using additives and nanosized particles, many types of dampers for automotive suspension and civil structures, medical and rehabilitation devices, MRF polishing technology, the methods of magnetic circuit design, and the synthesis of various controllers. More recently, the effect of the temperature and thermal conductivity on the properties of MRFs and application systems are actively being investigated by several works. However, there is no review article on this issue so far, despite the fact that the thermal problem is one of the most crucial factors to be seriously considered for the development of advanced MRFs and commercial products of application systems. In this work, studies on the thermal conductivity and temperature in MRFs themselves and their temperature-dependent application systems are reviewed, respectively, and principal results are summarized, emphasizing the following: how to reduce the temperature effect on the field-dependent properties of MRFs and how to design an application system that minimizes the thermal effect. It is noted here that the review summary is organized in a chronological format using tables.

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Section: Temperature Effect and Thermal Conductivitymentioning

confidence: 99%

mentioning

confidence: 99%

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Choi

2023

Micromachines

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“…However, high magnetic permeability in the microwave region is observed only when the colloid is subjected to strong magnetic fields (∼100 kA m −1 ) necessary for the ferromagnetic resonance to occur [18][19][20][21]. On the other hand, on the basis of magnetic colloids, new promising complex liquid magnetizable materials can be created, the controllability of which properties is based on the control of the material microstructure by means of a magnetic field [22,23]. Such materials include, in particular, magnetodielectric emulsions, one of the phases of which is represented by ferrofluid [24,25].…”

Section: Introductionmentioning

confidence: 99%

Absorption spectrum of magnetically structured emulsions in the centimeter range

Turkin,

Zakinyan,

Bozhenko

2024

Phys. Scr.

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The high degree of absorption of microwave radiation by composite materials with developed morphology can be significantly improved by directly changing the geometrical parameters of the subwavelength structure, which is difficult in the case of solid-state materials. In this work, a new composite liquid material with controlled absorption properties, a magnetodielectric emulsion, is investigated. The control of microgeometry parameters is accomplished through exposure to a magnetic field. The experimental studies have shown that the formation of chain structures from spherical water droplets in the composite leads to a significant change in the absorption coefficient. Thus, for an emulsion with 10% water content, exposure to a magnetic field of 25 kA/m increases the absorption coefficient by 400% at a radiation frequency of 10 GHz. It is noteworthy that the efficiency of the absorption properties control depends on the volume concentration of droplets in the sample and has a non-monotonic character. To interpret the obtained results, numerical modeling of the studied system in the effective medium approximation was carried out.

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Electromagnetic wave absorption by magnetic colloids with conductive filler in the centimeter range

Turkin,

Zakinyan,

Semyonova

et al. 2024

Appl. Phys. A

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Thermal percolation in a magnetic field responsive composite

Cited by 4 publications

References 35 publications

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Thermal Conductivity and Temperature Dependency of Magnetorheological Fluids and Application Systems—A Chronological Review

Absorption spectrum of magnetically structured emulsions in the centimeter range

Electromagnetic wave absorption by magnetic colloids with conductive filler in the centimeter range

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