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Thematische Bibliographien / Convective mixers / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Convective mixers“

Autor: Grafiati

Veröffentlicht am 14. Dezember 2024

Zuletzt aktualisiert am 31. Juli 2025

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1

Shamsoddini, Rahim. "Incompressible SPH Modeling of Rotary Micropump Mixers." International Journal of Computational Methods 15, no. 04 (2018): 1850019. http://dx.doi.org/10.1142/s0219876218500196.

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In the present study, for the first time, the flow and mass transfer in the rotary micropump-micromixers were investigated by the SPH method. In fact, the present work shows the ability of the SPH method to model the mixing process due to pumping action. The incompressible SPH method applied for modeling is improved by the kernel gradient corrective tensor, a particle shifting algorithm, and an improved periodic boundary condition. SPH is a proper method for modeling the mixing process because there is no modeling for the convective terms and so, the false diffusion is not observed in the SPH

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Biliaiev, M. M., V. A. Kozachyna, M. V. Kyrychenko, M. O. Skuratov, A. O. Chirkov, and H. K. Filonenko. "Mathematical models for water treatment problems." Science and Transport Progress, no. 1(109) (March 13, 2025): 5–13. https://doi.org/10.15802/stp2025/324157.

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Purpose. Assessing the efficiency of water treatment in different structures is a problem of big importance. To solve this a problem, it is necessary to have mathematical models that allow to quickly obtain data on the cleaning effect in different structures. The aim of the work is to develop numerical models to determine the efficiency of water treatment in an aeration tanks, settlers and mixers. Methodology. For mathematical modeling of the process of water treatment in a bioreactor, balance equations were used. These equations allow to determine concentrations of substrate, activated sludge

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3

Chen, Hao, Fangfang Lou, Xueyi Zhang, Chengjun Shen, Weicheng Pan, and Shuang Wang. "Hydrothermal Conversion of Microalgae Slurry in a Continuous Solar Collector with Static Mixer for Heat Transfer Enhancement." Energies 16, no. 24 (2023): 7986. http://dx.doi.org/10.3390/en16247986.

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The continuous solar collector is a promising heater and reactor for the hydrothermal liquefaction (HTL) of microalgae biomass. To enhance the heat transfer and hydrothermal conversion of microalgae slurry in solar-driven reactors, a static mixer is inserted in the flow channel of the solar collector. A numerical model combining CFD and HTL reactions of microalgae biomass is proposed. Six composition equations of protein, carbohydrates, lipids, biocrude, aqueous phase and biogas were proposed, while corresponding HTL kinetics were utilized to simulate the conversion rate of the reactants and p

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Yang, Haipeng, Guanguo Ma, and Wei Zhao. "DEM-Based Simulation Study on the Operational Performance of a Single Horizontal Shaft Forced-Action Mixer." Buildings 15, no. 15 (2025): 2627. https://doi.org/10.3390/buildings15152627.

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This study conducts a numerical simulation of the working performance of a single horizontal shaft forced mixer using the Discrete Element Method (DEM). It systematically investigates the effects of blade installation angle, feeding method, mixing speed, and coarse aggregate particle size on the mixing uniformity. A 1:2 scale model was developed, incorporating Newton’s laws of motion and a soft-sphere contact model to simulate the particle trajectories and interactions during mixing. The results indicate that top–bottom feeding enhances mixing efficiency significantly by forming vertical conve

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Lebedev, Anatoly, Badma Salaev, Baatr Bolaev, Jury Arylov, Pavel Lebedev, and Nikolai Rybalkin. "INTENSIFICATION OF THE PROCESS OF MIXING FEED MIXTURES." SCIENCE IN THE CENTRAL RUSSIA, no. 6 (December 26, 2022): 50–59. http://dx.doi.org/10.35887/2305-2538-2022-6-50-59.

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The quality and reliability of the technological process of preparing feed mixtures has a significant role both on the properties of the manufactured product and on the productivity of animals. The use of standard mixer designs, as a rule, does not ensure the quality of mixtures, economy, efficiency and leads to an increase in energy costs for the implementation of the technological process. Despite the presence of a wide variety in mixer designs, the need for new mixer developments remains an urgent problem associated with the constant increase in requirements for the uniformity of feed mixtu

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Yoon, Young Joon, Jae Kyung Choi, Jong Woo Lim, et al. "Microfluidic Devices Fabricated by LTCC Combined with Thick Film Lithography." Advanced Materials Research 74 (June 2009): 303–6. http://dx.doi.org/10.4028/www.scientific.net/amr.74.303.

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Low temperature co-fired ceramic (LTCC) process combined with thick film photolithography was employed to fabricate ceramic-based microfluidic devices. To check the applicability of novel process, three types of passive mixers, diffusion-driven T-type mixers with different channel width and convection-driven chaotic mixer, were fabricated and their microfluidic performance was evaluated. It was confirmed that the degree of mixing in ceramic-based microfluidic passive mixers was well matched with the numerical simulation data.

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Zhang, Lei, Jiusheng Bao, Qingjin Zhang, Yan Yin, Tonggang Liu, and Shan Huang. "Design and Simulation of a Novel Planetary Gear Mixer for Dry Particle Materials." Recent Patents on Mechanical Engineering 13, no. 4 (2020): 387–403. http://dx.doi.org/10.2174/2212797613999200525140019.

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Background: Mixer with excellent performance is the essential premise for high-quality mixture production to ensure uniformity. In the fields of food, pharmacy, powder metallurgy and machinery industry, materials mixing is an indispensable process. At present, the mixing efficiency and performance of the traditional mixer are very low, which has its own limitations, and it is difficult to ensure the quality of the mixture, which seriously affects the safety and reliability of the mixture products such as synthetic drugs, chemical reagents, cement, synthetic fiber, etc. Objective: In order to i

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Doherty, R. M., D. S. Stevenson, W. J. Collins, and M. G. Sanderson. "Influence of convective transport on tropospheric ozone and its precursors in a chemistry-climate model." Atmospheric Chemistry and Physics 5, no. 12 (2005): 3205–18. http://dx.doi.org/10.5194/acp-5-3205-2005.

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Abstract. The impact of convection on tropospheric O3 and its precursors has been examined in a coupled chemistry-climate model. There are two ways that convection affects O3. First, convection affects O3 by vertical mixing of O3 itself. Convection lifts lower tropospheric air to regions where the O3 lifetime is longer, whilst mass-balance subsidence mixes O3-rich upper tropospheric (UT) air downwards to regions where the O3 lifetime is shorter. This tends to decrease UT O3 and the overall tropospheric column of O3. Secondly, convection affects O3 by vertical mixing of O3 precursors. This affe

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Mehrdel, Pouya, Shadi Karimi, Josep Farré-Lladós, and Jasmina Casals-Terré. "Novel Variable Radius Spiral–Shaped Micromixer: From Numerical Analysis to Experimental Validation." Micromachines 9, no. 11 (2018): 552. http://dx.doi.org/10.3390/mi9110552.

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A novel type of spiral micromixer with expansion and contraction parts is presented in order to enhance the mixing quality in the low Reynolds number regimes for point-of-care tests (POCT). Three classes of micromixers with different numbers of loops and modified geometries were studied. Numerical simulation was performed to study the flow behavior and mixing performance solving the steady-state Navier–Stokes and the convection-diffusion equations in the Reynolds range of 0.1–10.0. Comparisons between the mixers with and without expansion parts were made to illustrate the effect of disturbing

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Doherty, R. M., D. S. Stevenson, W. J. Collins, and M. G. Sanderson. "Influence of convective transport on tropospheric ozone and its precursors in a chemistry-climate model." Atmospheric Chemistry and Physics Discussions 5, no. 3 (2005): 3747–71. http://dx.doi.org/10.5194/acpd-5-3747-2005.

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Abstract. The impact of convection on tropospheric O3 and its precursors has been examined in a coupled chemistry-climate model. There are two ways that convection affects O3. First, convection affects O3 by vertical mixing of O3 itself. Convection lifts lower tropospheric air to regions where the ozone lifetime is longer, whilst mass-balance subsidence mixes O3-rich upper tropospheric (UT) air downwards to regions where the O3 lifetime is shorter. This tends to decrease UT ozone and the overall tropospheric column of O3. Secondly, convection affects O3 by vertical mixing of ozone precursors.

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Roxburgh, I. W. "Stellar Convective Cores." Symposium - International Astronomical Union 185 (1998): 73–80. http://dx.doi.org/10.1017/s0074180900238321.

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The internal structure of stars is governed by hydrostatic support, the distribution of the chemical elements, the transport of energy by radiation and convection, and the liberation of energy by nuclear reactions. The evolution of stars is primarily determined by the changing composition due to the nuclear burning of elements in the central parts of the star, and the redistribution of the products of these reactions by mixing processes. The dominant mixing process is convection: it governs the extent of the mixed cores in moderate and large mass main sequence stars and their subsequent evolut

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Hu, Huancui, L. Ruby Leung, Zhe Feng, and James Marquis. "Moisture Recycling through Pumping by Mesoscale Convective Systems." Journal of Hydrometeorology 25, no. 6 (2024): 867–80. http://dx.doi.org/10.1175/jhm-d-23-0174.1.

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Abstract Moisture recycling, the contribution of local evapotranspiration (ET) to precipitation, has been studied using bulk models assuming a well-mixed atmosphere. The latter is inconsistent with a climatologically stratified atmosphere that slants across latitudes. Reconciling the two views requires an understanding of overturning associated with different weather systems. In this study, we aim to better understand moisture recycling associated with mesoscale convective systems (MCSs). Using a convection-permitting WRF simulation equipped with water vapor tracers (WRF-WVT), we tag moisture

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Kurasiński, Tomasz, Czesław Kuncewicz, and Jacek Stelmach. "Method of convective velocity determination from dissipative range of energy spectrum." Chemical and Process Engineering 33, no. 1 (2012): 19–29. http://dx.doi.org/10.2478/v10176-012-0002-5.

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Method of convective velocity determination from dissipative range of energy spectrum In the study a new proposal of convective velocity determination necessary for eddy size determination from the dissipative range in a turbulent flow in a mixer was made. The proposed quantity depends on all the mean and fluctuating velocity components. By applying convective velocity one may determine the distribution of time and linear Taylor microscale in a stirred vessel.

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Mahmoud, A. Mashkour. "Analysis of transient mixed convection in a horizontal channel partially heated from below." Eastern-European Journal of Enterprise Technologies 4, no. 8 (112) (2021): 16–22. https://doi.org/10.15587/1729-4061.2021.238649.

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The heat convection phenomenon has been investigated numerically (mathematically) for a channel located horizontally and partially heated at a uniform heat flux with forced and free heat convection. The investigated horizontal channel with a fluid inlet and the enclosure was exposed to the heat source from the bottom while the channel upper side was kept with a constant temperature equal to fluid outlet temperature. Transient, laminar, incompressible and mixed convective flow is assumed within the channel. Therefore, the flow field is estimated using Navier Stokes equations, which involves the

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15

Hassan, Waqas, Hussain Sajjad, Naseem Rabia, Mariam Amna, and Khalid Shamila. "Mixed Convection and Radiative Heat Transfer of MHD Casson Fluid Flow by a Permeable Stretching Sheet with Variable Thermal Conductivity and Lying in Porous Medium." British Journal of Mathematics & Computer Science 22, no. 6 (2017): 1–14. https://doi.org/10.9734/BJMCS/2017/33762.

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This work investigates the mixed convection radiative heat transfer of electrically conducting Casson fluids. The fluid flows past a permeable stretching sheet lying in the porous medium. The heat transfer involves variable thermal conductivity and convective boundary conditions. The formulation of the problem is primarily in the form of the non-linear partial differential equations. These governing equations are transformed to their ordinary differential form by employing similarity transformation. The resulting equations are then solved numerically by classical Rung-Kutta method. Computation

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Huyke, Diego A., Ashwin Ramachandran, Oscar Ramirez-Neri, et al. "Millisecond timescale reactions observed via X-ray spectroscopy in a 3D microfabricated fused silica mixer." Journal of Synchrotron Radiation 28, no. 4 (2021): 1100–1113. http://dx.doi.org/10.1107/s1600577521003830.

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Determination of electronic structures during chemical reactions remains challenging in studies which involve reactions in the millisecond timescale, toxic chemicals, and/or anaerobic conditions. In this study, a three-dimensionally (3D) microfabricated microfluidic mixer platform that is compatible with time-resolved X-ray absorption and emission spectroscopy (XAS and XES, respectively) is presented. This platform, to initiate reactions and study their progression, mixes a high flow rate (0.50–1.5 ml min−1) sheath stream with a low-flow-rate (5–90 µl min−1) sample stream within a monolithic f

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Laurent, B. F. C., J. Bridgwater, and D. J. Parker. "Convection and segregation in a horizontal mixer." Powder Technology 123, no. 1 (2002): 9–18. http://dx.doi.org/10.1016/s0032-5910(01)00396-5.

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18

Chowdhury, Kakali. "MHD Mixed Convective Nanofluid Flow: Effect of Heat Source and Corrugated Boundary." Nanomedicine & Nanotechnology Open Access 8, no. 3 (2023): 1–14. http://dx.doi.org/10.23880/nnoa-16000255.

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The problem of MHD mixed convection is analyzed in a lid driven cavity with corrugated wavy bottom wall filled with Cu-H2 O nanofluid in presence of internal heat source. The top and right walls of the cavity are maintained with a uniform cold temperature whereas the left wall and bottom wavy wall are kept adiabatic. The top wall is moving with a constant velocity upon its lid and a rectangular heat source is placed horizontally inside the cavity. The physical problem is characterized by 2D governing partial differential equations along with proper boundary conditions and are discretized using

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19

Liu, Minye. "Computational study of convective–diffusive mixing in a microchannel mixer." Chemical Engineering Science 66, no. 10 (2011): 2211–23. http://dx.doi.org/10.1016/j.ces.2011.02.036.

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20

O Jegede, Oluwagbemiga. "Variationen der mittleren Mächtigkeit der konvektiven Mischungsschicht über Westafrika." Meteorologische Zeitschrift 3, no. 6 (1994): 307–11. http://dx.doi.org/10.1127/metz/3/1994/307.

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21

Chowdhury, Kakali. "Heat Transfer Enhancement of MHD Mixed Convective Nanofluid Flow in a Double Lid Driven Enclosure with Sinusoidal Boundary Heat Source." Nanomedicine & Nanotechnology Open Access 9, no. 4 (2024): 1–11. https://doi.org/10.23880/nnoa-16000326.

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A numerical analysis of MHD mixed convective flow through copper-water nanofluid in a double lid driven enclosure with wavy bottom wall is executed. The top wall of the enclosure is kept insulated, the vertical walls are cooled isothermally and are moving at a constant speed in the upward and downward directions respectively whereas the wavy bottom wall is considered as sinusoidal heat source. The physical problem is represented mathematically by a set of governing equations and these equations are solved by using finite element method of Galerkin weighted residual approach. The fundamental fl

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Jia, Xiaoyu, Bingchen Che, Guangyin Jing, and Ce Zhang. "Air-Bubble Induced Mixing: A Fluidic Mixer Chip." Micromachines 11, no. 2 (2020): 195. http://dx.doi.org/10.3390/mi11020195.

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In this study, we report the design and fabrication of a novel fluidic mixer. As proof-of-concept, the laminar flow in the main channel is firstly filled with small air-bubbles, which act as active stirrers inducing chaotic convective turbulent flow, and thus enhance the solutes mixing even at a low input flow rate. To further increase mixing efficiency, a design of neck constriction is included, which changes the relative positions of the inclusion bubbles significantly. The redistribution of liquid volume among bubbles then causes complex flow profile, which further enhances mixing. This wor

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Yuan, Shuai, Bingyan Jiang, Tao Peng, Qiang Li, and Mingyong Zhou. "An Investigation of Flow Patterns and Mixing Characteristics in a Cross-Shaped Micromixer within the Laminar Regime." Micromachines 12, no. 4 (2021): 462. http://dx.doi.org/10.3390/mi12040462.

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A fast mixing is critical for subsequent practical development of microfluidic devices, which are often used for assays in the detection of reagents and samples. The present work sets up computational fluid dynamics simulations to explore the flow characteristic and mixing mechanism of fluids in cross-shaped mixers within the laminar regime. First, the effects of increasing an operating parameter on local mixing quality along the microchannels are investigated. It is found that sufficient diffusion cannot occur even though the concentration gradient is large at a high Reynolds number. Meanwhil

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Konopacki, Maciej, Marian Kordas, Karol Fijałkowski, and Rafał Rakoczy. "Computational Fluid Dynamics and Experimental Studies of a New Mixing Element in a Static Mixer as a Heat Exchanger." Chemical and Process Engineering 36, no. 1 (2015): 59–72. http://dx.doi.org/10.1515/cpe-2015-0005.

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Abstract The main aim of this work is to study the thermal efficiency of a new type of a static mixer and to analyse the flow and temperature patterns and heat transfer efficiency. The measurements were carried out for the static mixer equipped with a new mixing insert. The heat transfer enhancement was determined by measuring the temperature profiles on each side of the heating pipe as well as the temperature field inside the static mixer. All experiments were carried out with varying operating parameters for four liquids: water, glycerol, transformer oil and an aqueous solution of molasses.

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Sushil, Prasad, Sood Shilpa, and Thakur Archie. "Stagnation-Point Slip Flow of Hybrid Ferrofluid Past Exponentially Stretching Sheet in Darcy-Forchheimer Space." Indian Journal of Science and Technology 17, no. 10 (2024): 881–90. https://doi.org/10.17485/IJST/v17i10.1910.

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Abstract <strong>Objectives:</strong> The present article provides a detailed analysis on the Darcy-Forchheimer hybrid nanofluids flow past an exponentially stretching sheet in the presence of mixed convection with slip conditions and the impacts of different relevant parameters of the fluid flow for velocity and temperature profiles. <strong>Methods:</strong> In order to create hybrid nanofluids, two magnetic nanoparticles, magnetite ( ) and cobalt ferrite ( ), are taken into consideration. The governing boundary layer coupled partial differential equations are transformed into

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José, Jordi, Steven N. Shore, and Jordi Casanova. "123–321 models of classical novae." Astronomy & Astrophysics 634 (January 28, 2020): A5. http://dx.doi.org/10.1051/0004-6361/201936893.

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Context. High-resolution spectroscopy has revealed large concentrations of CNO and sometimes other intermediate-mass elements (e.g., Ne, Na, Mg, or Al, for ONe novae) in the shells ejected during nova outbursts, suggesting that the solar composition material transferred from the secondary mixes with the outermost layers of the underlying white dwarf during thermonuclear runaway. Aims. Multidimensional simulations have shown that Kelvin-Helmholtz instabilities provide self-enrichment of the accreted envelope with material from the outermost layers of the white dwarf, at levels that agree with o

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Wang, Leilei. "Analysis on Relation between Mixing Ratio and Outlet Temperature and Velocity in a Cold-Hot-Water Mixer." International Journal of Nanoscience 13, no. 05n06 (2014): 1460005. http://dx.doi.org/10.1142/s0219581x14600059.

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To study the relation between cold-hot-water mixing ratio and outlet-water temperature of a mixer, the geometrical model of the mixer was built. On the basis of theoretical analysis, the outlet-water temperature with different mixing ratio of cold and hot water was simulated by FLUENT software. The results show that: flow field in mixer can be divided into recirculation zone and convection zone, in which there are different thermal resistances individually, and it result in the nonlinear relation in outlet average temperature and mixing ratio; there is a linear relation between outlet average

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Chen, Xueye, Jienan Shen, and Zengliang Hu. "Fabrication and performance evaluation of two multi-layer passive micromixers." Sensor Review 38, no. 3 (2018): 321–25. http://dx.doi.org/10.1108/sr-04-2017-0054.

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PurposeThe purpose of this study is to provide a micromixer for achieving effective mixing of two liquids. The mixing of two liquids is difficult to achieve in microfluidic chips because they cannot form turbulence at small dimensions and velocities.Design/methodology/approachIn this paper, four kinds of passive micromixers based on splitting–recombination and chaotic convection are compared. First, a better E-shape mixing unit based on the previous F-shape mixing unit has been designed. Then, the E-shape mixing units are further combined to form three micromixers (i.e. E-mixer, SESM and FESM)

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Bai, L., Q. J. Zheng, and A. B. Yu. "FEM simulation of particle flow and convective mixing in a cylindrical bladed mixer." Powder Technology 313 (May 2017): 175–83. http://dx.doi.org/10.1016/j.powtec.2017.03.018.

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Wünsch, O., and G. Böhme. "Numerical simulation of 3d viscous fluid flow and convective mixing in a static mixer." Archive of Applied Mechanics (Ingenieur Archiv) 70, no. 1-3 (2000): 91–102. http://dx.doi.org/10.1007/s004199900042.

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31

Gupta, A. K., and D. Surya. "Benard-Marangoni Convection with Free Slip Bottom and Mixed Thermal Boundary Conditions." Mathematical Journal of Interdisciplinary Sciences 2, no. 2 (2014): 141–54. http://dx.doi.org/10.15415/mjis.2014.22011.

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32

SHISHANOV, M. V., and CH G. COOK. "MODELING OF MIXING ELEMENTS IN MICROFLUIDICS." Herald of Technological University 27, no. 6 (2024): 94–98. http://dx.doi.org/10.55421/1998-7072_2024_27_6_94.

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Microfluidics (microhydrodynamics) is a science that describes the behavior of small (on the order of micro and nanoliter) volumes and flows of liquids. Microfluidic reactors are widely used in various fields of science: medicine, special chemistry, biochemistry, nuclear chemistry and many others. They are successful due to the increased mass and heat transfer, better process intensification and, as a result, high product yield. The most important elements of microreactors are the mixing zone, which provides destabilization and twisting of flows in order to mix them, and the reaction zone (ser

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Sanglee, Kanyanee, Surawut Chuangchote, Pipat Chaiwiwatworakul, and Pisist Kumnorkaew. "PEDOT:PSS Nanofilms Fabricated by a Nonconventional Coating Method for Uses as Transparent Conducting Electrodes in Flexible Electrochromic Devices." Journal of Nanomaterials 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/5176481.

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Nanofilms of a polymer mixer of two ionomers, poly 3,4-ethylenedioxythiophene:poly(styrene sulfonic acid) (PEDOT:PSS), were used as conducting materials to develop transparent conducting electrodes. It was firstly found that convective deposition, a versatile and wide-area coating method, could be used for the coating and acid treatment of PEDOT:PSS films. Electrical conductivity of the PEDOT:PSS films was significantly enhanced up to 1814 S/cm by only one-time surface treatment by a mild acid solution (4 M methanesulfonic acid). This is because some PSS chains were removed out from the polyme

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Benkhedda, F., T. Boufendi, and S. Touahri. "Prediction of Nanofluid Forced and Mixed Convection Heat Transfer through an Annular Pipe." International Journal of Materials, Mechanics and Manufacturing 5, no. 2 (2017): 87–91. http://dx.doi.org/10.18178/ijmmm.2017.5.2.296.

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Wibisono, Andhika Feri, Yacine Addad, and Jeong Ik Lee. "ICONE23-2005 A CFD ASSESSMENT FOR MIXED CONVECTION OF NANOFLUIDS FOR NUCLEAR APPLICATION." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–2—_ICONE23–2. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-2_3.

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Ranasinghe, Roshanka, and Charitha Pattiaratchi. "Circulation and mixing characteristics of a seasonally open tidal inlet: a field study." Marine and Freshwater Research 50, no. 4 (1999): 281. http://dx.doi.org/10.1071/mf98037.

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Tidal inlets in microtidal, wave-dominated coastal environments tend to close to the ocean seasonally. This obstructs navigation and could cause degradation of water quality in the estuary/lagoon connected to the inlet. Hence, engineering solutions are often implemented to prevent inlet closure. However, a prior knowledge of circulation and mixing processes within the estuary is crucial for the sustainability of any engineering solution. This paper attempts to provide insight into circulation and mixing characteristics of seasonally open estuaries based on the results of a field study undertak

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Devi, Rekha, and Shilpa Sood. "Investigation of Mixed Convective Stagnated Flow of Casson Nanofluid Past an Exponentially Stretching Sheet, using the Darcy - Forchheimer Model." International Journal of Science and Research (IJSR) 12, no. 10 (2023): 1777–85. http://dx.doi.org/10.21275/sr231023123321.

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Lakhdar, Aidaoui. "Numerical investigation of laminar mixed convection flow between two parallel planes in the presence of rotating cylinders." Recueil de mécanique 5, no. 1 (2020): 440–50. https://doi.org/10.5281/zenodo.4134200.

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In this work, mixed convection and laminar flow between two parallel planes in the presence of two rotating circular cylinders is investigated numerically. A wall flux density is imposed on the top and bottom planes and the rotating cylinders’ surfaces are assumed to be adiabatic. The study is performed for different values of Reynolds number , angular rotational velocity of the cylinders , angular velocity ratios of the cylinders  and the distance between the cylinders. It is observed that the flow patterns and thermal field are affected considerably by the rotational motion of the

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A.N, Maurix Mwango, Johana Sigey K, Jeconiah Okelo A, James Okwoyo M, and Kang’ethe Giterere. "A Study of Mixed Convection in an Enclosure with Different Inlet and Outlet Configurations." SIJ Transactions on Computer Networks & Communication Engineering 05, no. 01 (2016): 10–18. http://dx.doi.org/10.9756/sijcnce/v4i1/04010040101.

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Hao, Yinghai, Fang Guo, Guifang Wu, et al. "Numerical Simulation and Experimental Research on Heat Transfer Characteristics Based on Internal Meshing Screw." Applied Sciences 14, no. 1 (2023): 220. http://dx.doi.org/10.3390/app14010220.

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The mixing and processing of high-viscosity materials play a pivotal role in composite material processing. In this context, the internal meshing screw mixer, rooted in volume extensional rheology, offers distinct advantages, including heightened mixing efficiency, exceptional material adaptability, and favorable thermomechanical properties. This research endeavors to advance our understanding of these qualities by presenting an in-depth exploration of internal meshing screw mixing. To facilitate this, an internal meshing screw mixing experimental apparatus was meticulously constructed, accomp

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SHINOHARA, Kunio, and Sachiko SUWA. "Conceptional Design of a New Type Powder Mixer with Fluctuating Air. The Mechanism of Convective Mixing." Journal of the Society of Powder Technology, Japan 32, no. 5 (1995): 319–25. http://dx.doi.org/10.4164/sptj.32.319.

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Legoix, Léonard, Cendrine Gatumel, Mathieu Milhé, and Henri Berthiaux. "Analysis of powder flow and in-system rheology in a horizontal convective mixer with reclining blades." Particulate Science and Technology 36, no. 8 (2017): 955–66. http://dx.doi.org/10.1080/02726351.2017.1331284.

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Huppert, Herbert E., and R. Stephen J. Sparks. "Melting the roof of a chamber containing a hot, turbulently convecting fluid." Journal of Fluid Mechanics 188 (March 1988): 107–31. http://dx.doi.org/10.1017/s0022112088000655.

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The input of a hot, turbulently convecting fluid to fill a chamber can result in the roof of the chamber melting. The rate of melting of the roof is here analysed experimentally and theoretically. Three separate cases are considered. The melt may be heavier than the fluid and initially sink through it. The intense motion in the fluid then mixes the falling melt in with it. Alternatively, the melt may be less dense than the fluid and form a separate layer between the roof and the fluid. This melt layer can itself be in quite vigorous convective motion. An intermediate case is shown to be possib

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Amarasinghe, Widuramina, Ingebret Fjelde, Nils Giske, and Ying Guo. "CO2 Convective Dissolution in Oil-Saturated Unconsolidated Porous Media at Reservoir Conditions." Energies 14, no. 1 (2021): 233. http://dx.doi.org/10.3390/en14010233.

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During CO2 storage, CO2 plume mixes with the water and oil present at the reservoir, initiated by diffusion followed by a density gradient that leads to a convective flow. Studies are available where CO2 convective mixing have been studied in water phase but limited in oil phase. This study was conducted to reach this gap, and experiments were conducted in a vertically packed 3-dimensional column with oil-saturated unconsolidated porous media at 100 bar and 50 °C (representative of reservoir pressure and temperature conditions). N-Decane and crude oil were used as oils, and glass beads as poro

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Salamat, Jaber, and Bülent Genç. "Numerical Simulation of Granular Flow in Concrete Batching Plant via Discrete Element Method." European Journal of Research and Development 3, no. 2 (2023): 11–28. http://dx.doi.org/10.56038/ejrnd.v3i2.219.

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A new giant concrete batching plant with the production capacity of 270m3/hr was designed, analyzed and fabricated. In this concrete batching plant, the granular materials used for high-quality products must be uniformly mixed to attain a homogenous mixture. For this, the discrete element method (DEM) was utilized to simulate the filling, mixing, and discharging processes. The Hertz-Mindlin, elastic-plastic spring-dashpot and Simplified Johnson-Kendall-Roberts (SJKR) models were used for the interaction rules among granular particles. In the light of the aforementioned models, the first simula

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Shi, Liuyong, Hanghang Ding, Xiangtao Zhong, Binfeng Yin, Zhenyu Liu, and Teng Zhou. "Mixing Mechanism of Microfluidic Mixer with Staggered Virtual Electrode Based on Light-Actuated AC Electroosmosis." Micromachines 12, no. 7 (2021): 744. http://dx.doi.org/10.3390/mi12070744.

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In this paper, we present a novel microfluidic mixer with staggered virtual electrode based on light-actuated AC electroosmosis (LACE). We solve the coupled system of the flow field described by Navier–Stokes equations, the described electric field by a Laplace equation, and the concentration field described by a convection–diffusion equation via a finite-element method (FEM). Moreover, we study the distribution of the flow, electric, and concentration fields in the microchannel, and reveal the generating mechanism of the rotating vortex on the cross-section of the microchannel and the mixing

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Abou-Ziyan, Hosny, Reda Ameen, and Khairy Elsayed. "Fluid flow and convection heat transfer in concentric and eccentric cylindrical annuli of different radii ratios for Taylor-Couette-Poiseuille flow." Advances in Mechanical Engineering 13, no. 8 (2021): 168781402110407. http://dx.doi.org/10.1177/16878140211040731.

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This paper presents the results of fluid flow and convection heat transfer in concentric and eccentric annuli between two cylinders using a three-dimensional computational fluid dynamics model. Effects of rotational speed ( n = 0, 150, 300, and 400 rpm) and eccentricity (ε = 0, 0.15, 0.3, 0.45, and 0.6) on axial and tangential velocity distribution, pressure drop and forced convection heat transfer are investigated for radii ratios (η) of 0.2, 0.4, 0.6, and 0.8, Reynolds number 2.0 × 103–1.236 × 105, Taylor number 1.47 × 106–1.6 × 1010, and Prandtl number 3.71–6.94. The parameters cover many a

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Kostanyan, Artak E., Vera V. Belova, and Andrey A. Voshkin. "Three- and Multi-Phase Extraction as a Tool for the Implementation of Liquid Membrane Separation Methods in Practice." Membranes 12, no. 10 (2022): 926. http://dx.doi.org/10.3390/membranes12100926.

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To promote the implementation of liquid membrane separations in industry, we have previously proposed extraction methods called three- and multi-phase extraction. The three-phase multi-stage extraction is carried out in a cascade of bulk liquid membrane separation stages, each comprising two interconnected (extraction and stripping) chambers. The organic liquid membrane phase recycles between the chambers within the same stage. In multi-phase extraction, each separation stage includes a scrubbing chamber, located between the extraction and stripping chambers. The three- and multi-phase multi-s

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SHTERN, VLADIMIR, and FAZLE HUSSAIN. "Generation of collimated jets by a point source of heat and gravity." Journal of Fluid Mechanics 449 (December 10, 2001): 39–59. http://dx.doi.org/10.1017/s0022112001006097.

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New solutions of the Boussinesq equations describe the onset of convection as well as the development of collimated bipolar jets near a point source of both heat and gravity. Stability, bifurcation, and asymptotic analyses of these solutions reveal details of jet formation. Convection (with l cells) evolves from the rest state at the Rayleigh number Ra = Racr = (l − 1)l(l + 1)(l + 2). Bipolar (l = 2) flow emerges at Ra = 24 via a transcritical bifurcation: Re = 7(24 − Ra)/(6 + 4Pr), where Re is a convection amplitude (dimensionless velocity on the symmetry axis) and Pr is the Prandtl number. T

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Shah, Imran, Han Su Jeon, Muhsin Ali, Doh Hoi Yang, and Kyung-Hyun Choi. "Optimal parametric mixing analysis of active and passive micromixers using Taguchi method." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 6 (2019): 1292–303. http://dx.doi.org/10.1177/0954408919862997.

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Mixing of fluids flowing through channels and chambers is a crucial step in chemical and biochemical reactions inside microfluidic devices due to laminar flow because of small size channel and chamber dimensions. Mixing can be enhanced by passive or active mechanism which makes convection dominant over diffusion. To address this challenge, the study proposes three novel mixing designs: passive mixer, active mixer and a combination of active and passive mixing. These designs mixing performance has been studied by numerical simulation using COMSOL 5.3. According to the preliminary results of the

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