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  • A three-dimensional numerical study of the Magnus

    2012-12-11 · In addition, various cylinder shapes, including truncated cone and wavy cylinder, have also been used and their effects on the performance of the Magnus wind turbine are analyzed. Performance characteristics such as power, torque, and thrust coefficients of the Magnus turbine with different blade shapes are compared and discussed with the aim of identifying the desirable blade characteristics for this type of turbine.

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  • Three-Dimensional Wakes of Simulated Wind

    2012-5-17 · Three-Dimensional Wakes of Simulated Wind Turbines. ... Wind turbine rotor simulation using the actuator disk and actuator line methods. ... Renewable and Sustainable Energy Reviews, Vol. 48. Turbulent mixing in wind turbine and actuator disc wakes: experiments and POD analysis.

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  • Three dimensional flow around a circular cylinder

    2008-11-11 · The effectiveness of three dimensional passive devices for flow control on low pressure turbine airfoils was investigated experimentally. A row of small cylinders was placed at the pressure minimum on the suction side of a typical airfoil.

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  • Experiments With Three Dimensional Passive Flow

    The model includes three-dimensional wind and wave loads and the associated structural response. The total system is formulated using 17 degrees of freedom (DOF), 6 for the platform motions and 11 for the wind turbine. Three-dimensional hydrodynamic loads have been formulated using a frequency- and direction-dependent spectrum.

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  • Fully Coupled Three-Dimensional Dynamic Response

    In this paper we investigate the three-dimensional unsteady real-gas flows which occur within Organic Rankine Cycle (ORC) turbines. A radial-inflow turbine stage operating with supersonic vane exit flows (M 1.4) is simulated using a RANS solver which includes real-gas effects.Steady CFD simulations show that small changes in the inducer shape can have a significant effect on turbine ...

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  • A Study of the Three-Dimensional Unsteady Real-Gas

    2017-12-14 · A large eddy simulation (LES) was conducted to visualize the three-dimensional (3D) flow structures of a round jet impinging onto a circular cylinder with an inclination angle of 45°. The Reynolds number of the round jet is 11,800, and the distance from the nozzle exit to cylinder surface is four times the jet diameter. To verify the LES results, planar particle image velocimetry (PIV ...

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  • Transient three-dimensional flow structures of oblique

    Applied Mechanics Reviews; ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering ... This paper describes a three-dimensional Euler solver for turbomachinery blade rows. The algorithm used is based on the explicit, four-step, finite volume method advocated by Jameson. ... The Euler solver has been ...

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  • Dynamic analysis of three-dimensional drivetrain

    2014-4-28 · The paper reports on the prediction of the turbulent flow field around a three-dimensional, surface mounted, square-sectioned cylinder at Reynolds numbers in the range 10 4 –10 5. The effects of turbulence are accounted for in two different ways: by performing large-eddy simulations (LES) with a Smagorinsky model for the subgrid-scale motions and by solving the unsteady form of the Reynolds …

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  • Three dimensional flow around a circular cylinder

    The present analysis describes the three dimensional compressible inviscid flow in the scroll and the vaneless nozzle of a radial inflow turbine. The solution to this flow field, which is further complicated by the geometrical shape of the boundaries, is obtained using the finite element method.

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  • Analysis of the Three-Dimensional Flow in a Turbine

    In order to construct the skill acquisition method for a common treatment of dental caries, it is necessary to prepare quantitative guidelines for Dental students.

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  • In this study, measurement and analysis for the movements of fingers and turbine have been conducted during tooth removal and restoration process using three-dimensional motion capture.

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  • Takumi Sato - Three-dimensional measurement of

    2018-5-24 · , “ Three dimensional numerical simulations of a straight-bladed vertical axis tidal turbine,” in 18th Australasian Fluid Mechanics Conference, USB (2012), pp. …

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  • A two and three-dimensional CFD investigation into ...

    3D printing has been hailed as a disruptive technology which will change manufacturing. Used in aerospace, defence, art and design, 3D printing is becoming a subject of great interest in surgery. The technology has a particular resonance with dentistry, and with advances in 3D imaging and modelling …

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  • 3D printing in dentistry

    2014-8-4 · This paper presents the results from three-dimensional (3D) steady and unsteady Navier-Stokes computations, performed on the transonic VKI BRITE EURAM test turbine stage. The work aimed at giving deeper insight in the aerodynamics of the turbine stage.

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  • Investigation of the Flowfield in the Transonic VKI

    2021-5-26 · Compared with a 2D section, a three-dimensional (3D) model can reflect the spatial information of the components of organs, which is widely used for ascertaining 3D architectural information. 15 ...

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  • Three-dimensional reconstruction of systematic ...

    2020-6-1 · Methods. We analyzed variation in three-dimensional (3D) facial images of 7057 subjects: 3327 with 396 different syndromes, 727 of their relatives, and 3003 unrelated, unaffected subjects. We ...

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  • Automated syndrome diagnosis by three-dimensional

    Foshan Liang Ya Dental Equipment Co., Ltd., Experts in Manufacturing and Exporting Dental Equipment(LED Curing Light, High Speed Handpiece and 475 more Products. A Verified CN Gold Supplier on Alibaba.com.

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  • Three-Dimensional Analysis of Turbine Rotor Flow

    Applied Mechanics Reviews ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering ASME Letters in Dynamic Systems and Control

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  • Accuracy of digital dental models and three

    2021-3-4 · Accuracy of digital dental models and three-dimensional printed dental models in linear measurements and Bolton analysis 1 Please help EMBL-EBI …

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  • Three-dimensional dental model analysis of treatment ...

    INTRODUCTION The aim of this retrospective study on dental models was to compare the orthodontic outcomes of maxillary dentoalveolar protrusion treated with headgear, miniscrews, or miniplates for maximum anchorage. METHODS The 40 subjects were diagnosed as having either Angle Class II malocclusion or Class I bimaxillary dentoalveolar protrusion. All patients were treated to retract the ...

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  • Three-dimensional wind turbine simulation and analysis

    2020-10-13 · Three-dimensional wind turbine simulation and analysis by Jennifer Ann Cordero A thesis submitted to the graduate faculty in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Major: Mechanical Engineering Major Professors: R. …

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  • Three-dimensional dental cast analyzing system using

    The purpose of this article is to introduce the outline of our newly developed three-dimensional dental cast analyzing system with laser scanning, and its preliminary clinical applications. The system is composed of a measuring device with a slit-ray laser projector and two sets of coupled charged devised video cameras, an image processing unit, a 16-bit personal computer as a controller, and ...

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  • Three dimensional tidal turbine array simulations

    4 – (a) Time averaged velocity deficit (dashed) of vertical support tower at z/D= -0.75 showing the location of the support is shown (solid line) (b) comparison of velocity profile in

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  • Comparative study on a newly-developed three

    In this paper, an analytical three-dimensional wake model is developed to study the wind turbine wake effect and the model is compared with the existi…

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  • Making three-dimensional Monson's sphere using

    OBJECTIVES The Monson's sphere and curve of Wilson can be used as reference for prosthetic reconstructions or orthodontic treatments. This study aimed to generate and measure the three-dimensional (3-D) Monson's sphere and curve of Wilson using virtual dental models and custom software. METHODS Mandibular dental casts from 79 young adults of Korean descent were scanned and …

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  • Study of Three-Dimensional Gas-Turbine Combustor

    Study of Three-Dimensional Gas-Turbine Combustor Flows . Authors: Shyy, Wei Braaten, Mark E. Burrus, David L. Issue Date: 1989: Source: International Journal of Heat and Mass Transfer, v. 32, (6), June 1989, p. 1155-1164: Summary: Both computational and experimental results are presented for studying the three-dimensional flow in an annular gas ...

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  • The Calculation of Three Dimensional Viscous Flow

    2015-3-18 · The extension of a well established three dimensional flow calculation method to calculate the flow through multiple turbomachinery blade rows is described in this paper. To avoid calculating the unsteady flow, which is inherent in any machine containing both rotating and stationary blade rows, a mixing process is modelled at a calculating ...

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  • Effect of Various Injection Hole Shapes on Film

    2009-2-4 · Three-dimensional Navier-Stokes code with k – ε model was used to compute the film cooling coefficient on the turbine blade. A multi-block grid system was generated that was nearly orthogonal to the various surfaces. Mainstream Reynolds number based on the cylinder diameter was 7.1 × 10 4. The turbulence intensity kept at 5.0% for all inlets.

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  • Unsteady Three-Dimensional Flow Phenomena Due to

    2008-11-24 · Unsteady three-dimensional flow fields in a transonic axial compressor rotor (NASA Rotor 37) have been investigated by unsteady Reynolds-averaged Navier-Stokes simulations. The simulations show that the breakdown of the tip leakage vortex occurs in the compressor rotor because of the interaction of the vortex with the shock wave.

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  • A three-dimensional underwater sound propagation

    The three-dimensional printing of scaffolds is an interesting alternative to the traditional techniques of periodontal regeneration. This technique uses computer assisted design and manufacturing after CT scan. After 3D modelling, individualized scaffolds are printed by extrusion, selective laser sintering, stereolithography, or powder bed inkjet printing.

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  • Tissue Engineering and Three-Dimensional Printing in ...

    2014-9-18 · Direct Constrained Computational Fluid Dynamics Based Optimization of Three-Dimensional Blading for the Exit Stage of a Large Power Steam Turbine J. Eng. Gas Turbines Power (January,2003) Effects of Wind Turbine Starting Capability on Energy Yield

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  • Analysis of the Effect of a Slotted Flap Mechanism on

    2009-7-11 · Cone Beam Computed Tomography (CBCT) is a relatively new technology to dentistry, used for the three-dimensional imaging of the teeth and jaws …

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  • Cone beam CT in dental practice | British Dental Journal

    3D printing or additive manufacturing is a process of making three dimensional solid objects from a digital file. The creation of a 3D printed object is achieved using additive processes. In an additive process an object is created by laying down successive layers of material until the object is created. Each of these layers can be seen as a ...

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  • What is 3D printing? How does a 3D printer work?

    2015-4-15 · The artificial damping and compressibility method (ADC) is a rapid numerical technique for solving steady three-dimensional incompressible and compressible Navier-Stokes equation. The principle of this method lies in the introduction of an artificial damping factor into the group of linear equations, by which the elliptic equation is replaced ...

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  • The ADC Method: A Rapid Numerical Technique for

    2019-1-13 · In this study, the flow‐focusing method with a microfluidic device was used to generate gelatin bubbles to fabricate highly ordered three‐dimensional (3D) scaffolds. Rat H9c2 myoblasts were seeded into the 3D gelatin bubble‐based scaffolds and compared to those grown on 2D gelatin‐coating substrates to demonstrate the influences of ...

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  • 'AN IMPROVED THREE DIMENSIONAL BLADE FOR

    Title of Invention 'AN IMPROVED THREE DIMENSIONAL BLADE FOR AXIAL STEAM TURBINE' Abstract: This invention relates to an improved three dimensional blade for axial steam turbine comprising leading edge (23) with an inlet flow angle (24) and a trailing edge (28) with an outflow angle (27), a pressure face (25) between the leading edge and the trailing edge, a suction face (22) between the ...

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  • Three-dimensional numerical simulations of ...

    This study reviews recent research in the wake aerodynamics of H-rotor VAWTs. ... the Magnus force transported the wake flows towards windward. Note that the flow blowing over a spinning cylinder produces the Kutta-Joukowski lift, which ... Study of wake characteristics of a vertical Axis wind turbine by two- and three-dimensional computational ...

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  • A review on the wake aerodynamics of H-rotor

    2014-8-4 · Today’s advanced high pressure turbine blades in aero and aero-derivative turbines feature thin walls (<.030 inches), complex internal geometries, three dimensional (3D) aerodynamic shapes, multiple protective coatings and complex film cooling schemes. A major contributor to blade life cycle cost is the ability to perform multiple repairs ...

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  • Coating Rejuvenation: New Repair Technology for

    2012-5-2 · Investigation of the cylinder wake under spanwise periodic forcing with a segmented plasma actuator Physics of Fluids, Vol. 27, No. 1 Three-dimensional simulations of discharge plasma evolution on a dielectric barrier discharge plasma actuator

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  • Spatially Distributed Forcing and Jet Vectoring with a ...

    2004-7-21 · The three-dimensional shape of the dental insertion element of that embodiment accordingly comprises, corresponding to the first part-circle seen in cross-section, a part-cylinder cut along the cylinder axis, which then passes into a curved portion of any shape corresponding to the at least one curved line seen in cross-section.

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  • Dental insertion element of non-cylindrical shape -

    The development of turbomachinery wake flows are greatly influenced by streamline curvature and streamwise pressure gradient. This paper is a part of a comprehensive experimental and theoretical study on the development of the steady and the periodic unsteady turbulent wakes in curved channels at different streamwise pressure gradients.

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