Serpentine Centrifugal Field
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- Serpentine Centrifugal Field
Computational fluid dynamics modeling at Reynolds numbers ranging from 10 to 100 was used to characterize the performance of a new type of micromixer employing a serpentine channel with a grooved surface. The new topology exploits the overlap between the typical Dean flows present in curved channels due to the centrifugal forces experienced by the …
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3.3 Temperature Field and Flow Field. In order to understand the influence of fins on the temperature field and flow field of serpentine microtubes, the mass flux G = 200 kg⋅m −2 ⋅s −1 and flow direction VU are taken as an example to compare the differences between serpentine microtubes with fins and those without fins.
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In this paper a centrifugal, serpentine micromixer is simulated and reformed toward better mixing performance. The micromixer was chosen to be curved as a curved design was found to be thrice as ...
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Inertial particle focusing as a powerful passive method is widely used in diagnostic test devices. It is common to use a curved channel in this approach to achieve particle focusing through balancing of the secondary flow drag force and the inertial lift force. Here, we present a focusing device on a disk based on the interaction of secondary flow drag force, inertial lift …
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Explore over 38,000 international journals covering a vast array of academic fields. Search. Ask a Question. Answer a Question. Quickly pose questions to the entire community. Debate answers and get clarity on the most important issues facing researchers. ... Numerical simulation of centrifugal serpentine micromixers and analyzing mixing ...
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PDF | On Jan 1, 2015, Danish Syed and others published Advance of the Aerodynamic Aspects of Serpentine Air-Intakes: A Review | Find, read and cite all the research you need on ResearchGate
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In base sinusoidal serpentine (Fig. 7a), mixing enhances in the transverse direction when the species enter to serpentine microchannel due to the centrifugal forces. These forces are produced due to radial pressure gradients in the flow field because of channel curvatures.
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The combined effects of gravitational buoyancy, centrifugal force, and centrifugal buoyancy on heat transfer vary with flow direction, with vertical upward flow performing the best and vertical downward flow performing the worst. Fu et al. (2024) [56] …
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Particle inertial focusing in a curved channel promises a big potential for lab-on-a-chip applications. This focusing concept is usually based on the balance of inertial lift force and the drag of secondary flow. This paper proposes a new focusing concept independent of inertial lift force, relying solely on secondary flow drag and particle centrifugal force. Firstly, a focusing …
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Performance and implementation of centrifugal serpentine micromixers with non-rectangular cross-section. Joshua A Clark 1, Tahir A Butt 1, Gautam Mahajan 2, ... 2017 Numerical study of enhanced mixing in pressure-driven flows in microchannels using a spatially periodic electric field Phys. Rev. E 96 033117. Crossref Google Scholar
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Similar to other serpentine/spiral shaped micromixers, the design exploits the formation of transversal vortices (Dean flows) in pressure-driven systems, associated with the centrifugal forces ...
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a non-rectangular cross-section is investigated. Similar to other serpentine/spiral shaped micromixers, the design exploits the formation of transversal vortices (Dean flows) in pressure-driven systems, associated with the centrifugal forces experienced by the fluid as it is confined to move along curved geometries.
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Award ID(s): 1659541 PAR ID: 10130595 Author(s) / Creator(s): Clark, Joshua A; Butt, Tahir A; Mahajan, Gautam; Kothapalli, Chandrasekhar R; Kaufman, Miron; Fodor ...
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The findings of various studies show that serpentine flow fields outperform alternative designs in coolant distribution, heat transfer efficiency, and operating temperature …
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The centrifugal buoyancy and gravitational buoyancy have a synergistic and competitive relationship in the serpentine tube. When centrifugal buoyancy and gravitational buoyancy are in a synergistic relationship, which promotes the change of the flow field and makes the convection heat transfer coefficient change rapidly.
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By 15 ms, the first half of the flow field (C1 to C5) is still in the bubble flow regime, while the second half (C6 to C9), especially at the bends, starts to form slug flow and transition to annular flow, as seen at 40 ms. At 40 ms, the flow field has a combination of bubbles (in C1 and C2), slugs (in C3 to C7), and annular flow (in C8 and C9).
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To demonstrate the practical aspects of a random serpentine network of medium-field electrospun AgMFs and combined thermal and chemical annealing, ... (PEO solution) to 1 (silver paste) using a planetary centrifugal mixer (ARE-310, Thinky Corp.) at a …
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The barriers are engineered to induce periodic perturbations in the flow field and enhance the mixing. download Download free PDF View ... Madadelahi M and Akbari A 2016 Numerical simulation of centrifugal serpentine micromixers and analyzing mixing parameters Chem. Eng. Process. 104 243–52 Filimonov R and Sorvari J 2017 Numerical study on ...
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This paper presents an inertial microfluidic device with a simple serpentine micro-channel to continuously separate particles with high performance. Separation of micro/nano-particles has a ...
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The authors considered three different serpentine structures [Fig. 5(A) to (C)] and compared the mixing efficiency for Newtonian and non-Newtonian fluids in centrifugal and non-centrifugal devices. 19 They used the finite element method to solve the relevant equations. They also studied the effects of rotational and non-rotational serpentine ...
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In the context of high Reynolds number flow within the serpentine tube (S-tubes), the centrifugal forces become the dominant radial force. In conjunction with the internal density gradient, …
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Particle focusing efficiency along a continuous path is another key parameter in evaluating the performance of a serpentine microchannel. Serpentine microchannels, indeed, operate based on this mechanism. The Dean drag and centrifugal forces are the main factors deriving particles in a continuous path within the serpentine microchannels.
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Serpentine channels coupling inertial and secondary flows enable effective particle focusing and separation, showing great potential in clinical diagnostics and drug screening. However, the nonsteady secondary flows in the serpentine channel make the evolution of inertial migration unclear, hindering the development and application of the serpentine channel. …
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In this paper, a centrifugal force-based serpentine micromixer (CSM) on a plastic lab-on-a-disk (LOD) for biochemical assay was designed, fabricated, and fully characterized with numerical and ...
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Active techniques rely on external force fields, while passive techniques utilize channel geometry and hydrodynamic ... centrifugal forces acting on the particles [4]. In this paper, the authors produced a numerical model of a symmetric serpentine microchannel particle sorter. The performance of the microchannel with respect to efficiency (η)
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The flow-field simulations were performed using the computational package COMSOL Multiphysics 5.3a (COMSOL Inc., Stockholm Sweden) and its CFD/Chemical Engineering Modules. ... [49] Shamloo A, Madadelahi M and Akbari A 2016 Numerical simulation of centrifugal serpentine micromixers and analyzing mixing parameters Chem. Eng. Process. …
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Semantic Scholar extracted view of "Newtonian and generalized Newtonian reacting flows in serpentine microchannels: Pressure driven and centrifugal microfluidics" by M. Madadelahi et al. ... Semantic Scholar's Logo. Search 222,184,723 papers from all fields of science. Search. Sign In Create Free Account. DOI: 10.1016/J.JNNFM.2017.11.010;
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The radius of the serpentine microchannel has a direct effect on the centrifugal acceleration, which is defined as u 2 /R. The effect of centrifugal acceleration on fluid flow characteristics in the curved pipe has been presented in these papers [31], [32], [33]. In order to investigate the effects of fan-shaped reentrant cavities on fluid flow ...
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In this paper, a simulation investigation was carried out to optimize three parameters, such as GDL porosity, cathode inlet relative humidity and cathode inlet velocity to improve the performance of PEM fuel cell with serpentine flow-field. ANSYS Fluent 15 was used...
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Secondary flows result from the centrifugal forces generated by flows in serpentine, 10, 15 spiral, 6,[16][17][18][19][20][21] or helical 5,22-24 channels, generating a pair of counter-rotating ...
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As the basic tubular receiver unit, the solar receiver tube affects the flow and convective heat transfer of S-CO 2.When fluid flows in a serpentine channel, secondary flow is generated under the action of centrifugal force, which makes the convective heat transfer performance higher than that of the straight tube [5], [6], [7], [8].
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a centrifugal microfluidic platform. They used the serpen-tine microchannel only for the purpose of lengthening the flow path to secure sufficient diffusion time without detail understanding of mixing behaviors inside the serpentine microchannels in a centrifugal-force field. Disposability is the main characteristic required of an
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In supercritical carbon dioxide (S-CO 2) serpentine microtube heat exchangers, heat transfer deterioration often occurs at the bend of serpentine microtube, which reduces the …
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Numerical simulation of centrifugal serpentine micromixers and analyzing mixing quality parameters Amir Shamloo1,2, Masoud Madadelahi1,*, ... active micromixers which use an external force field to enhance mixing such as magnetic fields (Wang, et al. [16]) or electrical fields (Wu and Liu [17]) and passive
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centrifugal serpentine micromixers with non-rectangular cross-section Joshua A Clark1, Tahir A Butt 1, Gautam Mahajan2, ... To determine the flow fields for all the geometries inves-tigated, the governing equations for momentum and mass conservation, i.e. the Navier–Stokes equations of …
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On the curved sections of the serpentine channel, the interplay between the outward directed centrifugal force and the inward directed transverse pressure field from fluid shear allows for separation of particles.
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