Dielectrophoretic influence on free convection in a differentially heated cavity

Jawichian, Alex; Siedel, Samuel; Davoust, Laurent

doi:10.1016/j.ijheatmasstransfer.2022.123560

Cited by 6 publications

(3 citation statements)

References 40 publications

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“…Thus, a particle possessing a greater radius will experience greater dielectrophoretic force than a particle with a smaller radius. The DEP force is also proportional to the square of the electric field gradient [35]. Thus, a particle will experience DEP force when placed in an AC or DC field.…”

Section: Theoretical Analysismentioning

confidence: 99%

A comprehensive analysis of enhanced microfluidic device for detection of Pathogenic Bacteria and CTCs in the bloodstream

Brahma,

Kumar,

Narzary

2024

Preprint

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In the current research scenario, microfluidics has gained immense attention in the field of medical diagnostics. However, a decisive platform for segregating multiple bioparticles like pathogenic bacteria, and CTCs from blood cells needs to be instigated. This paper proposes a microfluidic chip for the segregation of multiple bioparticles like pathogenic bacteria and CTCs from blood cells. Utilizing the Navier- Stokes equation for configuring the fluid flow in the microchannel, the study leverages the dielectrophoresis technique for manipulating target bacterial and cancer cells with a diameter of 1 µm and 16–30 µm respectively. The main channel of the microfluidic device has uniquely designed electrodes to generate the non-uniform electric field for manipulating the particles through different outlets. The blood, bacteria, and cancer cells are introduced through the inlet at the velocity of 100 µl/s and the buffer solution with a flow velocity of 700 µl/s. The analysis showed that at the electrode voltage of 14 Vp-p, the target bioparticles are separated efficiently. The chip is designed using the COMSOL Multiphysics tool, an advanced and promising platform for early detection of bloodstream bacterial infection and CTCs with perfect separation efficiency and purity.

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Section: Theoretical Analysismentioning

confidence: 99%

A comprehensive analysis of enhanced microfluidic device for detection of Pathogenic Bacteria and CTCs in the bloodstream

Brahma,

Kumar,

Narzary

2024

Preprint

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“…Another application concerns the possibility to enhance the heat transfer between two surfaces (see Turnbull & Melcher 1969; Fogaing et al. 2014; Jawichian, Siedel & Davoust 2023). Dedicated heat exchangers could be based on thermo-electric convection and used in space technologies, where energy saving and apparatus lifetimes are important issues.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, in a curved channel, the electric gravity provides a central force field that allows for the experimental investigation of planet-like systems (see Chandra & Smylie 1972;Yavorskaya, Fomina & Belyaev 1984;Zaussinger et al 2019;Travnikov & Egbers 2021). Another application concerns the possibility to enhance the heat transfer between two surfaces (see Turnbull & Melcher 1969;Fogaing et al 2014;Jawichian, Siedel & Davoust 2023). Dedicated heat exchangers could be based on thermo-electric convection and used in space technologies, where energy saving and apparatus lifetimes are important issues.…”

Section: Introductionmentioning

confidence: 99%

Thermo-electric convection in a cylindrical annulus during a sounding rocket flight

Meyer,

Meier,

Motuz

et al. 2023

J. Fluid Mech.

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An experiment on convective flows induced by the dielectrophoretic force was performed under the microgravity condition provided during a sounding rocket flight. The dielectrophoretic force possesses a non-conservative term that can be seen as resulting from an electric gravity. That gravity can be responsible for an electric Rayleigh–Bénard convection between a hot inner cylinder and a cold outer cylinder when an electric field is applied in the radial direction. Four cells with independent temperature and electric field controls allowed the investigation of eight different values of the electric Rayleigh number relatively close to the onset of the thermo-electric instability. A linear stability analysis is performed to predict the stability threshold and the evolution of the growth rate of the instability. The three-dimensional structure of the flow is captured by simultaneous particle image velocimetry and by shadowgraphy. The amplitude of the instability modes and the time evolution of the flow is analysed, and various methods are proposed to extrapolate the experimental critical value of the electric Rayleigh number for the onset of convection. The measured critical electric Rayleigh number is in agreement with the prediction of the linear stability theory. The comparison of the new experimental results with previous ones from parabolic flight campaigns highlights the importance of long-term microgravity for the achievement of thermal convection at low values of the control parameters.

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A transient free convection heat transfer study in an oil tank with vertical and horizontal arrangements of heating coils

Hosseini,

Rajabi Zargarabadi,

Zirak

2024

J Therm Anal Calorim

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Dielectrophoretic influence on free convection in a differentially heated cavity

Cited by 6 publications

References 40 publications

A comprehensive analysis of enhanced microfluidic device for detection of Pathogenic Bacteria and CTCs in the bloodstream

A comprehensive analysis of enhanced microfluidic device for detection of Pathogenic Bacteria and CTCs in the bloodstream

Thermo-electric convection in a cylindrical annulus during a sounding rocket flight

A transient free convection heat transfer study in an oil tank with vertical and horizontal arrangements of heating coils

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