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  • Three‐dimensional analysis of the flow in a curved ...

    Three‐dimensional analysis of the flow in a curved hydraulic turbine draft tube. ... The three‐dimensional turbulent flow in a curved hydraulic turbine draft tube is studied numerically. The analysis is based on the steady Reynolds‐averaged Navier–Stokes equations closed with the κ‐ε model. ... The recovery factor increases up to a ...

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  • Optimum Design of the Dental Air-Turbine

    2020-1-22 · An air-turbine and associated air supply tube was optimized as a dental air-turbine handpiece system. The system consists of an air-turbine with an impeller and a housing, and an air supply tube which supplies compressed-air to the air-turbine. The flow characteristics of the dental air-turbine handpiece system were …

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  • Self-assembled micro-computed tomography for

    The self-assembled micro-CT system was constructed using a portable dental X-ray tube, an intraoral digital X-ray detector, a high-precision rotation stage, related bracket accessories, and a notebook computer. Reconstructed images and three-dimensional models of the maxillary right third molar were produced using the self …

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  • Heat transfer in gas turbine engines and three

    Heat transfer in gas turbine engines and three-dimensional flows; Proceedings of the Symposium, ASME Winter Annual Meeting, Chicago, IL, Nov. 27-Dec. 2, 1988 The present conference on heat transfer characteristics of gas turbines and three-dimensional flows discusses velocity-temperature fluctuation correlations at the …

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  • Three-Dimensional Turbulent Flow Analysis for a

    Foshan Sinole Medical Devices Co., Ltd., Experts in Manufacturing and Exporting 3-Way syringe, dental handpiece and 247 more …

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  • 3-Way syringe, dental handpiece - Foshan Sinole

    Advanced camera-based vision system delivers high-speed data acquisition, drastically speeding up and simplifying the verification of entire components. Combined Data Three-dimensional data collected with the RS5 Laser Scanner combined with fine detail surface texture and fibre orientation data gathered with …

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  • Vision System 3D | Hexagon MI

    2016-5-12 · Three-dimensional numerical simulation for a prototype pump-turbine has been performed to investigate the transient characteristics and flow behaviors in the startup process. The rotational speed, which varies with runner torque and inertial of the rotating systems, is obtained by hydraulic-force coupling method.

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  • Three-dimensional simulation of unsteady flows in

    2021-7-5 · Re-inventing „the Windmill”. The Dutch have a reputation for obtaining energy by means of a windmill. This energy was used for all kinds of purposes, such as milling of raw material, water pumping, etc .. Today, the windmill is a means to generate sustainable energy. The Dutch MSc Marinus Mieremet has been working …

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  • Re-inventing the Windmill by The Archimedes

    2015-4-17 · the ψ = 60 turbine as the one to be studied in the following dynamic three-dimensional analysis. Hereinafter, the ψ = 60 V A WT will be the only H elical turbine compared to the S traig ht one.

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  • 64. Numerical Three-Dimensional Turbulent Flow

    The simulation of three-dimensional turbulent flow through a Pump-Turbine draft tube at turbine mode, as a part of the complete pump-turbine calculation is presented in this paper. Four cases were calculated based on the Computational Fluid Dynamics – CFD Methodology (Navier-Stokes equations and the k-ε turbulent …

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  • Numerical Investigations on the Leakage Flow ...

    2021-3-15 · A Three-Dimensional Tube Bundle Model Analysis for Leakage Flow Characteristics of Variable Bristle Diameter Brush Seals With Bristle Pack Stratification J. Eng. Gas Turbines Power (May,2021) Experimental and Numerical Investigations on the Leakage Flow Characteristics of the Labyrinth Brush Seal

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  • Numerical Development of a Coupled One

    2021-1-18 · This work describes the development of a methodology that couples one-dimensional (1D) network elements with three-dimensional spatial computational fluid dynamic (CFD) elements to analyze shell-and-tube heat exchangers with dense tube bundles. The 1D elements represent the tube flow while the spatial elements …

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  • Numerical simulation of the flow and heat-transfer ...

    2018-12-25 · Three-dimensional (3D) finned tubes have come into being. 3D finned tube is a kind of discrete finned tube, the fins of a 3D finned tube are small pieces directly cut from the wall of the metal tube using a machine tool cutter, therefore, there is no thermal contact resistance in the interface between the fins and the parent tube.

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  • Three-dimensional visualization of composite

    Three-dimensional visualization of composite fillings for dental identification using CT images A Sakuma , *, 1 H Saitoh , 1 Y Makino , 1, 2 G Inokuchi , 1 M Hayakawa , 1 D Yajima , 1 and H Iwase 1 1 Department of Legal Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan

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  • 3D Tomography of Turbine Blades - NDT.net

    2006-8-15 · The first row of turbine blades used in power generating gas turbines has to withstand high temperatures and stress. Failure of the blades during operation can lead to very high costs for repair and loss of power-production. To investigate those blades three-dimensional (3D) x-ray tomography is used for non …

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  • Emerging trends in endodontic irrigation - Dental

    Three-dimensional obturation of the root canal system. As endodontists, our main goal should be to focus on the predictable elimination of ... 2mm with an “up and down” action every six seconds as each canal is flushed. This up and down action removes micro-gas ... connected to the turbine coupling compressed air enters the

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  • 3-Way syringe, dental handpiece - Foshan Sinole

    Foshan Sinole Medical Devices Co., Ltd., Experts in Manufacturing and Exporting 3-Way syringe, dental handpiece and 247 more …

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  • Autoclavable dental handpiece with disposable

    1996-4-29 · The turbine 501 shown in FIGS. 23-25 is somewhat similar to the turbine 95 shown in FIG. 12. The turbine 501 includes a turbine body 503 with turbine blades 505 extending therefrom. The turbine blades 505 are centered generally along the length of the turbine body 503, and the body 503 defines upper and lower bosses …

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  • Additive manufacturing of Ti6Al4V alloy: A review ...

    2019-2-15 · 1. Introduction. Ti6Al4V alloy, also known as Ti64, is an α + β titanium alloy with high strength, low density, high fracture toughness, excellent corrosion resistance and superior biocompatibility [1,2].Recognized as the most popular titanium alloy, Ti6Al4V occupies almost a half of the market share of titanium …

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  • Tuned-aperture computed tomography (TACT).

    Tuned-aperture computed tomography (TACT). Theory and application for three-dimensional dento-alveolar imaging. Webber RL(1), Horton RA, Tyndall DA, Ludlow JB. Author information: (1)Department of Dentistry and Radiology, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC, USA.

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  • Three-Dimensional Simulation of Fluid Flow and

    2014-1-30 · An appropriate design of vortex-chamber geometry leads to better performance of the vortex tube. In this study, the computational fluid dynamics model created on the basis of an experimental model is a three-dimensional steady compressible model using a k-ε turbulence model to solve the equations. In this …

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  • Takumi Sato - Three-dimensional measurement

    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 …

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  • Chapter 10: Special Topics - Human Health Campus

    2015-3-18 · The tooth can be imaged in three ways • Intra oral examination with the x-ray tube external and a bitewing film placed inside the mouth • Extra oral examination where both the X-ray tube and detector is external to the patient to form an OPG • A conebeam CT image 10.2. DENTAL RADIOGRAPHY 10.2.1. Introduction

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  • Cavitation surge modelling in Francis turbine draft

    2018-6-9 · Cavitation surge modelling in Francis turbine draft tube. ... To predict this phenomenon, a one-dimensional draft tube model is derived from flow momentum and continuity equations including the convective terms that are not considered in the existing models. A parametric analysis of the draft tube model is carried out to …

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  • dental chair dimensions | Treedental

    It normally takes 7-10 days for delivery. But you need to do the customs clearance at your airport and pick the goods up there. Sea Shipping is the lowest-cost way for big order, such as dental chair/dental unit order. It normally takes 30-60 days for delivery. But you need to do the customs clearance at your seaport and pick the goods up …

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

    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 …

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  • Experimental Studies of an IceWind Turbine

    2020-12-24 · turbine, a number of parameters are considered; such as number of blades, end plates, number of stages, aspect ratio and blade arc angle. Savonius wind turbine will be discussed as the nearest design for IceWind turbine since there are no previous studies for this kind of turbine. The shape is taken from its website …

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  • 3D printing of ceramics: A review - ScienceDirect

    2019-4-1 · Three-dimensional printing (3DP) The 3DP method was first devised by Sachs et al. at the Massachusetts Institute of Technology (MIT), who filed a patent for it in 1989 [ 165 ]. Although 3DP can be considered an indirect ceramic inkjet printing process, its distinctive feature is the use of powder beds, which is why 3DP is …

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  • 3D Accuitomo 170 - Morita - PDF Catalogs |

    With 9 fields of view and multiple acquisition modes, the 3D Accuitomo 170 can meet all of your diagnostic needs with unparalleled quality. Its super-fine minimal voxel size of just 80µm allows diagnosing even the most subtle details of bone and dentition. The 3D Accuitomo 170 is highly recommended by leading dental radiologists for ...

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  • Dental Drill - an overview | ScienceDirect Topics

    2013-9-30 · Dental burs have revolutionized the dentistry field and are used for cutting hard tissues such as bone or tooth [1,4,6–9]. They are normally made of stainless steel, diamond grit or particles, and tungsten carbide and fitted to a dental drill incorporating an air turbine. The dental bur was developed <300 years ago [8] …

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  • 3D Accuitomo Clinical Case Evidence - Morita -

    Observation of images on non-network computers can be achieved with the One Data Viewer, and the One Volume Viewer without installing i-Dixel. 3D Accuitomo 170 One Data Viewer & One Volume Viewer Software These unique J. Morita applications let you view three dimensional images and volume rendered images even if the …

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  • US5340433A - Modeling apparatus for three

    Apparatus incorporating a movable dispensing head provided with a supply of material which solidifies at a predetermined temperature, and a base member, which are moved relative to each other along multiple axes in a predetermined pattern to create three-dimensional objects by building up material discharged from the …

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  • X-ray computed tomography | Nature Reviews

    2021-2-25 · X-ray computed tomography (CT) can reveal the internal details of objects in three dimensions non-destructively. In this Primer, we outline the basic principles of CT and describe the ways in ...

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  • Additive manufacturing of metallic components –

    2018-3-1 · Additive manufacturing (AM) processes build three-dimensional (3D) parts by progressively adding thin layers of materials guided by a digital model. This unique feature allows production of complex or customized parts directly from the design without the need for expensive tooling or forms such as punches, dies or …

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  • Patents in Class 433/84

    Toothbrush system with a three-dimensional brushing action and fluid irrigation ... A portable dental apparatus for treating patients or animals in remote locations comprises a dental drill driven by an air turbine; a ... Transparent dental tube unit A transparent dental tube unit contains a transparent turbine gas supply ...

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  • Mechanics and Materials Science - World Scientific

    2016-10-16 · The 2016 International Conference on Mechanics and Materials Science (MMS2016) was held in Guangzhou, China on October 15–16, 2016. Aimed at providing an excellent international academic forum for all the researchers and practitioners, the conference attracted a wide spread participation among all ...

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  • Sensing of Tooth Microleakage Based on Dental

    2015-2-15 · This study describes microleakage sensing based on swept-source optical coherence tomography (SS-OCT). With a handheld scanning probe, the SS-OCT system can provide portable real-time imaging for clinical diagnosis. Radiography is the traditional clinical imaging instrument used for dentistry; …

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  • Comparison of MTA, CEM Cement, and

    2020-11-12 · Background . Internal bleaching is a choice of treatment in discolored endodontically treated teeth. Cervical root resorption is one of the important complications of this treatment. A suggested procedure to prevent this type of resorption is using a coronal barrier under the bleaching materials. The aim of the …

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  • 3D Accuitomo 170 - Morita - PDF Catalogs |

    With 9 fields of view and multiple acquisition modes, the 3D Accuitomo 170 can meet all of your diagnostic needs with unparalleled quality. Its super-fine minimal voxel size of just 80µm allows diagnosing even the most subtle details of bone and dentition. The 3D Accuitomo 170 is highly recommended by leading dental radiologists for ...

    Get Price
  • 3D Accuitomo Clinical Case Evidence - Morita -

    Observation of images on non-network computers can be achieved with the One Data Viewer, and the One Volume Viewer without installing i-Dixel. 3D Accuitomo 170 One Data Viewer & One Volume Viewer Software These unique J. Morita applications let you view three dimensional images and volume rendered images even if the …

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  • Portable Dental Turbine Unit W/H 3 Way Syringe

    Features 1. Basic model, Mini-compact design 2. Easy to use:Just connect to air compressor (0.4Mpa~0.8Mpa required) to get start 3. 1 3-Way Syringe Included 4. Foot Pedal Switch 5. SKU: JK-D-SLWLJ-M4 JK-D-SLWLJ-B2 Specifications Air pressure input: 4-8kg Air pressure output: 0-4kg Air pressure for handpiece: …

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  • 1,520 Backgrounds Dental Photos - Free &

    1998-12-1 · turbine size for European deployment in 2018 was 6.8MW [1], and GE will launch its 12-MW Haliade-X offshore turbine to the market in 2021 with a rotor diameter of 218m and direct-drive configuration. To be relevant now and in the coming years, a new reference wind turbine should leap ahead of the current …

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  • IEA Wind TCP Task - NREL

    Figure 3-10.—Girder span on pipe columns. Figure 3-11.—Built-up column section. such that the joints or splices are 1 1/2 to 2 feet above the …

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  • STRUCTURAL STEEL TERMS LAYOUT AND

    Three-dimensional (3D) printing holds potential to reproduce complex bionic devices or fabricate organs with intricate 3D micro-architecture in vitro. 3D printing, also known as additive manufacturing and rapid prototyping, was initially described as stereolithography . It is a methodology using 3D computer-aided design (CAD) …

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  • Three-dimensional bioprinting speeds up smart

    It normally takes 7-10 days for delivery. But you need to do the customs clearance at your airport and pick the goods up there. Sea Shipping is the lowest-cost way for big order, such as dental chair/dental unit order. It normally takes 30-60 days for delivery. But you need to do the customs clearance at your seaport and pick the goods up …

    Get Price
  • Boundary Layer (Tesla) Turbine Page

    2021-2-25 · X-ray computed tomography (CT) can reveal the internal details of objects in three dimensions non-destructively. In this Primer, we outline the basic principles of CT and describe the ways in ...

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