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  • The influence of molecular geometry on the efficiency of ...

    The focus is on studying the intricate role of the steric effects that influence molecular geometry, and the energy of electronic excited states on the photophysics of TADF. X-ray crystal data Fig. 2 shows the molecular structures obtained from X-ray experiments for molecules 6, 7 and 8.

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  • Numerical investigation of the influences of mixing ...

    2014-11-17 · In studying the influence of the mixing chamber length on the performance of the steam ejector, the primary, the secondary and the back pressure are fixed at 600 kPa, 15 kPa and 40 kPa, respectively. The mixing chamber length is changed without changing the convergence angle and the outlet diameter of the mixing chamber.

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  • The Influence of Atomizer Geometry on Effervescent

    2017-3-15 · the influence of geometric parameters on the quality of atomization. Geometric parameters investigated include exit orifice diameter, nozzle length-to-diameter ratio, mixing chamber diameter, mixing length and air injection geometry. Comparisons are made with previous studies performed using earlier versions of the hardware or al-

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  • A Numerical Study of the Influence of Diesel Nozzle ...

    2002-3-4 · A Numerical Study of the Influence of Diesel Nozzle Geometry on the Inner Cavitating Flow. 2002-01-0215. In order to analyze the influence of nozzle geometry on the internal flow characteristics of a Diesel injector, a CFD analysis of the flow through various nozzle geometries has been carried out with a commercial code.

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  • Experimental investigations of the influence of mixing ...

    The experimental apparatus and procedure are described. The aim of the research was to investigate the influence of the ejector geometry on is performance. A special attention was paid to the influence of the mixing chamber length on the gas suction rate, ejector efficiency as well as on the friction loss coefficient of the mixing chamber.

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  • Influence of particle size and blender size on blending ...

    The effect of particle size enlargement and blender geometry down-scaling on the blend uniformity (BU) was evaluated by Discrete Element Method (DEM) to predict the blending performance of a binary granular mixture. Three 10 kg blending experiments differentiated by the physical properties specifica …

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  • Experimental and numerical investigation of the influence ...

    2012-9-1 · To investigate the influence of the mixer diameter on ejector performance, a series of 12 measurement points was taken. Mixing sections with D MIX = 2 × 10 −3 m, D MIX = 3 × 10 −3 m, and D MIX = 5 × 10 −3 m were examined, each for the case with L MIX = 10 × D MIX, and α DIF = 5 °.

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  • Effects of Focus Geometry on the Hard Rock-Cutting ...

    Abrasive waterjets are being increasingly used in civil engineering for rock and concrete cutting, particularly for the demolition or repair of old structures. The energy of an abrasive waterjet is primarily provided by the accelerated abrasive. The momentum transfer during mixing and acceleration determines the abrasive velocity, which affects the cutting performance.

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  • The Influence of Shroud and Cavity Geometry on Turbine ...

    2008-6-17 · Imperfections in the turbine annulus geometry, caused by the presence of the shroud and associated cavity, have a significant influence on the aerodynamics of the main passage flow path. In this paper, the datum shroud geometry, representative of steam turbine industrial practice, was systematically varied and numerically tested.

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  • Influence of CO2 concentration on the performance of

    2021-1-1 · This paper investigated the influence of different CO 2 concentrations on the microstructural and mechanical development of reactive MgO cement (RMC) concrete. Combination of various analyses revealed the enhancement of hydrated magnesium carbonate (HMC) phases with relatively superior micro-mechanical properties as the CO 2 concentration increased from ambient (~0.04%) to …

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  • Influence of Nozzle Geometry on the Noise of High-Speed ...

    2012-5-17 · American Institute of Aeronautics and Astronautics 12700 Sunrise Valley Drive, Suite 200 Reston, VA 20191-5807 703.264.7500

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  • A Numerical Study of the Influence of Diesel Nozzle ...

    2002-3-4 · A Numerical Study of the Influence of Diesel Nozzle Geometry on the Inner Cavitating Flow. 2002-01-0215. In order to analyze the influence of nozzle geometry on the internal flow characteristics of a Diesel injector, a CFD analysis of the flow through various nozzle geometries has been carried out with a commercial code.

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  • CFD Study on the Influence of Geometric Parameters on

    2018-8-30 · Within this paper, a parametric CFD study is conducted to determine the influence of three main geometry parameters of the EIS ejector design on the ejector’s performance. The parameters, namely the injection nozzle spacing, the mixing duct length, and the ejector nozzle height, are introduced in the context of the overall EIS design and ...

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  • Effects of fuel injection angle on mixing performance of ...

    2020-11-10 · Effects of fuel injection angle on mixing performance of scramjet pylon-cavity flameholder Physics of Fluids 32, 116108 ... “ Experimental investigation of influence factors on flame holding in a supersonic combustor,” Aerosp. Sci. ... “ Effects of pylon geometry on mixing enhancement in a scramjet pylon-cavity flameholder,” Aeronaut. J.

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  • Effects of the Re-Entrant Bowl Geometry on a DI ...

    2010-8-30 · The bowl geometry and dimensions, such as the pip region, bowl lip area, and toroidal radius, are all known to have an effect on the in-cylinder mixing and combustion processes. Based on the idea of enhancing diffusion combustion at the later stage of the combustion period, three different bowl geometries, namely, bowl 1 (baseline), bowl 2, and ...

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  • Influence of the vessel shape on the performance of a ...

    2018-10-1 · The shape of the tank plays an important role in the hydrodynamic performance of the agitation. A 3D simulation was done using CFD calculation code (CFX16.0). The study was carried out for large Reynolds number: 104–2.105. Navier–Stokes equations governing the phenomenon are solved by a method of discretization finite volume. The turbulence model used is the k–ε standard type. Our main ...

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  • Influence of Backbone Curvature on the Organic ...

    2021-7-6 · OECTs fabricated from PgBT(F)2gT featuring a curved backbone geometry attained a higher volumetric capacitance of 170 F cm −3. However, PgBT(F)2gTT with a linear backbone displayed overall superior OECT performance with a normalised peak transconductance of …

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  • The turbulent mixing layer: geometry of large vortices ...

    The turbulent mixing layer: geometry of large vortices. Department of Aerospace Engineering, University of Southern California, Los Angeles, CA 90089-0192 Permanent address: Department of Mechanical Engineering, Washington State University, Pullman, WA 99164-2920.

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  • Effect of Nanotube Geometry on the Strength and

    Abstract. This study investigated the effect of multiwalled carbon nanotubes’ geometry on the dispersion and strength of cement composites. Mixes with CNTs contents ranging from 0.03 to 0.25% were prepared and tested using CNTs’ diameters of 10–20, 20–30, and 30–50 nm and lengths of 0.5–2 and 10–30 μm.The samples’ microstructures were then examined using a scanning electron ...

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  • Influence of Humidity on the Electrostatic Charge and ...

    2007-3-22 · Abstract To investigate the influence of storage relative humidity (RH) on the aerosolisation efficiency and tribo-electrification of carrier based dry powder inhaler (DPI) formulations using the next generation impactor (NGI) in vitro methodology and the electrostatic low pressure impactor (ELPI). Micronised salbutamol (d 0.5 1.48 ± 0.03 μm) was blended with 63–90 μm sieve fractioned α ...

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  • Influence of impingement edge geometry on cavity flow ...

    2012-5-17 · Influence of impingement edge geometry on cavity flow oscillations. ... Numerical investigation of flow field effects on fuel–air mixing in a non-reacting trapped vortex combustor with different injection arrangements. ... Effect of Rear Face Geometry on the Open Cavity Oscillatory Flow at …

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  • Numerical and Experimental Study of Geometry Effects on ...

    2020-10-13 · Swirling flow is widely used in gas turbine burners to promote fuel/air mixing uniformity and to stabilize lean premixed flames. In this study, numerical and experimental methods are utilized to investigate the effects of burner geometry on fuel/air mixing and combustion performance and to optimize the burner geometry.

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  • Investigations on The Influence of Ignition Voltage ...

    2008-6-23 · Investigations on The Influence of Ignition Voltage, Higher Compression Ratio and Piston Crown Geometry on the Performance of Compressed Natural Gas Engines 2008-01-1762 The increasing demand of passenger fleet with the depletion of conventional fuels has resulted into a massive research for harnessing the potentials in alternate fuels.

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  • Influence of dispersion states on the performance of ...

    2014-9-12 · Influence of dispersion states on the performance of polymer-based nanocomposites. ... Sample geometry was such that a parallel plate capacitor configuration is used; the electrodes were evaporated silver, 1 cm in diameter and 100 nm in thickness. ... The result of this study specifically revealed that nanoscale dispersion could influence ...

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  • Effect of Rotation and Revolution on Performance of Blade ...

    In this study, flow structures and mixing performance in a blade-free planetary mixer, which combines rotation and revolution motions inside a cylindrical vessel, are numerically investigated. Flow fields in the mixer vessel are simulated in a single rotating reference frame with various revolution speeds and a fixed rotation speed. The mixing process is investigated by a Lagrangian particle ...

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  • Effects of Steel Fibers Geometry on the Mechanical ...

    Effects of Steel Fibers Geometry on the Mechanical Properties of SIFCON Concrete This research aims to shed light on the effect of steel fiber shape, length, diameter, and aspect ratio on the mechanical properties of slurry infiltration fiber reinforced concrete (SIFCON).

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  • The effects of slit-pore geometry on capacitive properties ...

    2020-4-16 · Ionic-liquids (IL) inside conductive porous media can be used to make electrical energy storage units. Many parameters such as the shape of the pores and the type of IL affect the storage performance.

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  • (PDF) Influence of Stroke on Performance Characteristics ...

    The present study experimentally demonstrates the influence of the. dimensionless stoke L on the performance characteristics of a synthetic jet fan under Reynolds number Re =. 1800 and the same ...

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  • Figure 4 from Improving the process performance of gold ...

    Corpus ID: 174779229. Improving the process performance of gold cyanide leaching reactors @inproceedings{LatvaKokko2015ImprovingTP, title={Improving the process performance of gold cyanide leaching reactors}, author={M. Latva-Kokko and T. Hirsi and T. Ritasalo and J. Tiihonen}, year={2015} }

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  • The Performance of Air-Air Ejectors With Triangular

    2008-9-19 · The performance parameters of most interest are pumping, mixing, and back-pressure. Geometric parameters studied include standoff distance, mixing-tube diameter, and tab angle. Experimental testing showed significant performance improvements in mixing and pumping with a decrease in tab angle. Maximum mixing was found to occur with tab angles ...

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  • The Influence of Inlet Geometry and Back Pressure on ...

    'The Influence of Inlet Geometry and Back Pressure on Cavitation and Noise Reduction in High Pressure Nozzles.' Proceedings of the ASME/JSME 2004 Pressure Vessels and Piping Conference . Emerging Technology in Fluids, Structures, and Fluid Structure Interactions: Volume 1, …

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  • Study of the Different Factors That Influence Jet Pump ...

    2013-12-24 · A simple geometry jet pump was designed, developed and tested. The experiments show that we should ... mixing chamber length of 7.25 Dmix had proven superi- ority over the other two mixing chambers length of 6.75 and 7.86 Dmix. Mixing throat length ranging from 3.5 to ... Study of the Different Factors That Influence Jet Pump Performance Author:

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  • 'Effect of electrode geometry on high energy spark ...

    This work shows the influence of the electrode configuration on the fluid dynamics following the spark discharge and how the hot gas evolution gives rise to various physical phenomena (i.e. generation of turbulence, inducing vorticity, and gas mixing) that can be used to modify the flow-field structure near the boundary layer on an aerodynamic ...

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  • Influence of Cowl Leading Edge on Inlet Performance of ...

    Influence of inflow Mach number and outflow pressure on inlet performance was also analyzed. ... Whereas a variable-geometry inlet maximizes performance, it adds weight and complexity to the ...

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  • Selective aerobic oxidation of para-xylene in sub- and ...

    In this paper we report a strong dependence of the observed performance of the catalyst on the geometry and the configuration of laboratory scale reactors in the continuous aerobic oxidation of p-xylene in supercritical water.Small differences, such as the length of the feed pipes …

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  • SAE MOBILUS

    2005-4-11 · “A numerical study of the influence of the diesel nozzle geometry in the injection rate characteristic” Fuel 83 4-5 419 431 2004 Singh I. Zhong L. Lai M.-C. Henein N.A. Bryzik W. “Effect of nozzle hole geometry on a HSDI diesel engine-out emissions” SAE Paper No 2003-01-0704 2003

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  • Influence of Steel Fibres and Matrix Composition on The ...

    2016-8-3 · Influence of steel fibres and matrix composition on the properties of UHPFRC Kim Huy Hoang, Philipp Hadl, Nguyen Viet Tue 5 4. Results Table 2: The critical volumes of StF1 and StF2 and the equivalent fibre factors for the four UHPC matrices. Fibre UHPC_1mm UHPC_2.5mm UHPC_4mm UHPC_8mm

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  • Influence of Rubber Pre-Processing on the Rheological ...

    2017-1-17 · enhance the asphalt road performance. It is also common to add small quantities of rubber, such as 1%, but also higher ... with geometry of 25 mm and a gap of of 1.0 mm for neat bitumen and 1.2 mm for crumb- ... and SBS has a positive influence on the mixing efficiency and the …

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  • Uncertainty quantification of the effects of squealer tip ...

    2020-1-13 · These geometry deviations would change the flow field near the blade tip, which will influence the thermal and aerodynamic performance. Thus, it is important to quantitatively investigate the effects of squealer tip geometry deviation on the aerothermal performance.

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  • Large eddy simulation of the turbulent mixing at an ...

    2021-4-15 · In the later stage of turbulent mixing, the influence of the initial wavelength on interface deformation and turbulent mixing becomes obvious. The width of the turbulent mixing zone corresponding to the shortest wavelength condition is the largest, and the gap between the shortest wavelength condition and other conditions is obvious.

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  • 'Moving Bed Biofilm Reactors: Evaluation of Geometry ...

    Finally, the influence of surface chemistry on biofilm attachment and performance was tested by facilitating biofilm growth on freely floating nylon and high-density polyethylene. Results indicate that organisms grown on more protected, sheltered carrier media respond to changes in mixing more rapidly than those on open and exposed media design.

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  • Influence of a Mixing-Jet on Film Cooling

    An experimental analysis of the slot film cooling performance downstream of a mixing jet has been performed. The mixing jet was blown into the main flow at a position five jet diameters downstream of the slot exit. Flow visualizations of the jet and of the cooling film are presented for blowing rates of 1 and 2 with jet momentum rates of 7 and 10.

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  • Mixing Enhancement in Simple Geometry Microchannels ...

    2008-5-12 · While mixing is good in all six cases, we demonstrate that the best results occur when both inlets are pulsed 90 degrees out of phase in the “T” geometry. In all six cases, the interface is shown to stretch, retain two folds, and sweep through the confluence zone, leading to good mixing within 2 mm downstream of the confluence, i.e. about 1 ...

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  • Mixing and Transport in Coastal River Plumes

    2019-10-25 · River plumes are generated by the flow of buoyant river water into the coastal ocean, where they significantly influence water properties and circulation. They comprise dynamically distinct regions spanning a large range of spatial and temporal scales, each contributing to the dilution and transport of freshwater as it is carried away from the source. River plume structure varies greatly among ...

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  • Why Structural Fiber is the Smart Choice for Thin Concrete ...

    2 天前 · Therefore, consideration of fiber geometry and stiffness when choosing fibers for concrete overlays often becomes an economic choice, where the designer must balance cost, workability, and performance. Regarding the influence of the material on the residual strength, steel fibers often outperformed synthetic fibers by a significant margin.

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  • Influence of Laser Power and Scanning Speed on the ...

    One of the well-known methods for increasing wear resistance, especially for friction pairs, is surfacing wear-resistant materials on the working surfaces of mating parts [1, 2, 3]. Less expensive grades of steel can be used as the main material in the manufacture of parts, and the surfacing materials in this case must have increased characteristics: mechanical, corrosion and radiation ...

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  • Influence of turbulent fluctuations on detonation ...

    Instead, these pockets mix and burn, on their surfaces, along turbulent shear layers. Owing to shock compression associated with the passage of transverse shock waves, these shear layers experience increased burning rates through turbulent mixing of the burned and unburned gases via Richtmyer–Meshkov instability.

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  • Influence of cellulose nanocrystals on the rheological ...

    2019-12-2 · Influence of cellulose nanocrystals on the rheological behaviour of Portland cement and pure limestone suspensions Fábio A. Cardoso1,2,*, Pedro C.R.A. Abrão1,2, Beatriz R. da Silva1,2, Germano A. Siqueira3, and Vanderley M. John1,2 1National Institute on …

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  • A mathematical model reveals the influence of population ...

    2020-8-14 · In response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), some politicians have been keen to exploit the idea of achieving herd immunity. Countering this possibility are estimates derived from work on historical vaccination studies, which suggest that herd immunity may only be achieved at an unacceptable cost of lives. Because human populations are far from homogeneous ...

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  • The Limits Of Compression Ratio

    2013-3-25 · President, Frankland Plastics Consulting, LLC. You have probably heard the terms 2:1, 3:1, and so on in describing single screws. These numbers refer to the compression ratio (C/R) of the screw, which is the ratio of the feed depth to the metering depth. Most people use C/R as a method to select the proper feed depth of the screw, but it ...

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