Journal articles: 'Streamlined body'

1

Lesger, Yona. "Stars, Stripes, and the Streamlined Body." Dress 44, no. 2 (July 3, 2018): 105–18. http://dx.doi.org/10.1080/03612112.2018.1496975.

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Yavorskii, N. I. "The thermal wake of a streamlined body." Journal of Applied Mathematics and Mechanics 55, no. 6 (January 1991): 819–27. http://dx.doi.org/10.1016/0021-8928(91)90134-g.

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Tang, Wen Hua, Ren Zhang Qian, Huai Yu Zou, and Bo Ming Pi. "The Optimal Selection Investigation on Flame Holder for Afterburner." Advanced Materials Research 354-355 (October 2011): 201–4. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.201.

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In order to determine the bluff body and slitted bluff body flame stability and combustion performance, atmospheric low-speed experimental platform was used to carry out diesel fog combustion experiment for two types of bluff body, which are respectively streamlined V-form added straight channel and triangle V-form added straight channel. Results have shown that flame stability and combustion efficiency of streamlined bluff body is orderly slit width at 13mm, 6mm, 0mm and the triangular bluff body is orderly slit width at 6mm, 13mm, 0mm. Optimal combustion performance is streamlined bluff body with slit width 13mm.

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Cortesi, Matteo, Giorgio Gatta, Giovanni Michielon, Rocco Di Michele, Sandro Bartolomei, and Raffaele Scurati. "Passive Drag in Young Swimmers: Effects of Body Composition, Morphology and Gliding Position." International Journal of Environmental Research and Public Health 17, no. 6 (March 18, 2020): 2002. http://dx.doi.org/10.3390/ijerph17062002.

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The passive drag (Dp) during swimming is affected by the swimmer’s morphology, body density and body position. We evaluated the relative contribution of morphology, body composition, and body position adjustments in the prediction of a swimmer’s Dp. This observational study examined a sample of 60 competitive swimmers (31 male and 29 female) with a mean (±SD) age of 15.4 ± 3.1 years. The swimmer’s Dp was measured using an electro-mechanical towing device and the body composition was assessed using a bioelectrical impedance analyser. Body lengths and circumferences were measured in both the standing position and the simulated streamlined position. Partial correlation analysis with age as a control variable showed that Dp was largely correlated (p < 0.05) with body mass, biacromial- and bi-iliac-breadth, streamline chest circumference and breadth. Body mass, Body Mass Index, chest circumference and streamline chest circumference showed a significant and moderate to strong effect (η2 > 0.55) on Dp. Body mass was the best predictor of Dp explaining 69% of the variability. These results indicate that swimmers with lower Dp values were: (i) slimmer, with lower fat and fat-free mass, (ii) thinner, with lower shoulder breadth, chest circumference, and streamline trunk diameters (iii), shorter, with lower streamline height. These findings can be used for talent identification in swimming, with particular reference to the gliding performance.

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Voropaiev, G. O., V. I. Korobov, and N. F. Dimitrieva. "MODELING OF A VENTILATED CAVITY BEHIND A STREAMLINED BODY." Journal of Numerical and Applied Mathematics, no. 1 (135) (2021): 73–79. http://dx.doi.org/10.17721/2706-9699.2021.1.09.

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The results of physical and numerical modeling of a ventilated air cavity behind a streamlined body are presented. The results of laboratory experiments to determine the amount of gas flowing from the ventilated cavity are presented. It is formed behind the cavitator depending on a number of geometric and dynamic parameters. Numerical simulation of non-stationary 3D two-phase flow was performed on the basis of open source software OpenFOAM. The influence of gas blowing parameters on the formation of an air cavity, size, shape and stability has been investigated. Good qualitative agreement with experimental data was obtained. It is shown that the thickness of the ventilated cavity is determined by the diameter of the cavitator regardless of the diameter of the blow hole, and the increase in velocity or gas flow rate has a positive effect on the length and stability of the formed cavity.

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Paukštaitis, Linas, Sigitas Kilikevičius, Ramūnas Česnavičius, Kristina Liutkauskienė, and Tadas Ždankus. "The Influence of Boiling on the Streamlined Body Drag Force and Falling Velocity." Applied Sciences 11, no. 4 (February 9, 2021): 1562. http://dx.doi.org/10.3390/app11041562.

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This article presents the results of numerical investigation of the influence of the streamlined body temperature on drag force and on the falling velocity in a water channel. The experimental data reflecting the cooling dynamics and body temperature influence on the falling velocity are presented as well. k − ε turbulence model and homogenous heat transfer model were chosen for the numerical 3D simulation. Drag force changes induced by the alteration of the body temperature were investigated. Velocity of the streamlined body under different temperatures of water was investigated experimentally, and the results were compared to the data obtained during the numerical simulation. The increase of the falling velocity and decrease of drag force were found to have been affected by the increase of the body temperature, which had influence on the change of the water parameters (density, phase, etc.) near the surface of the body. Simulation showed that the drag force and a velocity also depended on the water temperature. The drag force of the streamlined body decreased by 32% in comparison to the cold body for the body temperature equal to 150 °C and water temperature close to the saturation temperature (98 °C). Experimentally, it was determined that the velocity of the streamlined body covered by vapor film depended on the falling time and increased by 10–30%. Velocity difference was very small for the cold and hot bodies at the initial moment of the drop; however, it reached 20% and more after 0.3 s of the falling process.

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Sahu, Rajesh, and B. S. V. Patnaik. "CFD simulation of momentum injection control past a streamlined body." International Journal of Numerical Methods for Heat & Fluid Flow 21, no. 8 (November 2011): 980–1001. http://dx.doi.org/10.1108/09615531111177750.

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Grace, Sheryl Patrick, Hafiz M. Atassi, and William K. Blake. "Inverse aeroacoustic problem for a streamlined body. I - Basic formulation." AIAA Journal 34, no. 11 (November 1996): 2233–40. http://dx.doi.org/10.2514/3.13385.

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Dobrov, Yu V., M. E. Renev, V. A. Lashkov, I. Ch Mashek, and R. S. Khoronzhuk. "Heat flux on streamlined body surface after local energy input." Journal of Physics: Conference Series 1959, no. 1 (July 1, 2021): 012016. http://dx.doi.org/10.1088/1742-6596/1959/1/012016.

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Djuzhev, Nikolay A., Dmitry Novikov, and Vladimir Ryabov. "Application of the Streamlined Body for Properties Amplification of Thermoresistive MEMS Gas Flow Sensor." Solid State Phenomena 245 (October 2015): 247–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.245.247.

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The main problems of the gas flow meters are the improvement of the sensitivity and velocity range. In this paper thermoresistive membrane gas flow sensor is considered. The sensor is based on the calorimetric principle of operation and developed for the thermal gas flow meters. Special streamlined body was used to improve sensor’s characteristics. It is shown that streamlined body raises sensitivity by 2 times and improves velocity range of the sensor.

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ASAI, MASAHITO, AYUMU INASAWA, YASUFUMI KONISHI, SHINICHI HOSHINO, and SHOHEI TAKAGI. "Experimental study on the instability of wake of axisymmetric streamlined body." Journal of Fluid Mechanics 675 (March 29, 2011): 574–95. http://dx.doi.org/10.1017/jfm.2011.37.

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The instability of wake of an axisymmetric body with the NACA aerofoil section was experimentally studied under low background turbulence. The body was suspended using a magnetic suspension and balance system to avoid undesirable influences of mechanical supports on the disturbance development. The Reynolds number based on the chord length of the aerofoil section ranged from 5.3 × 104 to 2.1 × 105. For the body with a NACA0015 aerofoil section where there is no boundary-layer separation on the body surface, the wake was convectively unstable, even at the highest Reynolds number examined. Although the wake maintained axisymmetry of mean flow, the instability waves often took a planar-symmetric form, indicating that the occurrence of disturbance can be influenced by minute variations in the position and orientation of the suspended body. For bodies with thicker NACA0018 and NACA0024 aerofoil sections where the flow involved a region of absolute instability immediately downstream of the trailing edge, the global mode could grow rapidly and attain saturation amplitude within a very short distance from the trailing edge despite that the region of absolute instability was limited only to small streamwise distance, about one tenth of the instability wavelength. The predominant frequency of vortex shedding was found to be very close to the absolute frequency near the trailing edge, especially at the upstream boundary of the region of absolute instability. This is consistent with the theoretical model for the development of a nonlinear global mode. It was also found that the mean flow axisymmetry was broken around the critical Reynolds number for global instability, which led to the appearance and growth of a planar-symmetric global mode.

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Grace, Sheryl Patrick, Hafiz M. Atassi, and William K. Blake. "Inverse aeroacoustic problem for a streamlined body. II - Accuracy of solutions." AIAA Journal 34, no. 11 (November 1996): 2241–46. http://dx.doi.org/10.2514/3.13386.

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13

Moore, David, Jim Thomson, Tim Clayton, Finlay Kennedy, and Dan Beaumont. "Validation of a streamlined RT-qPCR method for body fluid identification." Forensic Science International: Genetics Supplement Series 7, no. 1 (December 2019): 518–19. http://dx.doi.org/10.1016/j.fsigss.2019.10.073.

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14

Fisher, E. M., and P. A. Eibeck. "The Influence of a Horseshoe Vortex on Local Convective Heat Transfer." Journal of Heat Transfer 112, no. 2 (May 1, 1990): 329–35. http://dx.doi.org/10.1115/1.2910381.

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The objective of this research program has been to determine experimentally the extent to which horseshoe vortices modify turbulent convective heat transfer along a flat plate downstream of an appendage. The importance of appendage shape on the heat transfer behavior was evaluated by taking Stanton-number measurements downstream of both a cylindrical body and a streamlined body. The results indicate that a region of augmented heat transfer occurs near the centerline downstream of both obstacles, with Stanton numbers 10 to 50 percent over the undisturbed values. The streamlined cylinder produces the strongest modifications in heat transfer.

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15

Pierce, F. J., and J. Shin. "The Development of a Turbulent Junction Vortex System (Data Bank Contribution)." Journal of Fluids Engineering 114, no. 4 (December 1, 1992): 559–65. http://dx.doi.org/10.1115/1.2910068.

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The growth and development of a horseshoe vortex system in an incompressible, three-dimensional turbulent junction flow were investigated experimentally. A streamlined cylinder mounted with its axis normal to a flat surface was used to generate the junction vortex flow. The flow environment was characterized by a body Reynolds number of 183,000, based on the leading edge diameter of the streamlined cylinder. The study included surface flow visualizations, surface pressure measurements, and mean flow measurements of total pressure, static pressure, and velocity distributions in three planes around the base of the streamlined cylinder, and in two planes in the wake flow. Some characterizations of vortex properties based on the measured mean cross-flow velocity components are presented. The results show the presence of a single large, dominant vortex, with strong evidence of a very small corner vortex in the junction between the cylinder and the flat surface. The center of the dominant vortex drifts away from both the body and the flat surface as the flow develops along and downstream of the body. The growth and development of the core of the large, dominant vortex are documented.

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Bodnarchuk, Julia S. "Reducing poorly streamlined body water resistance by using active boundary layer control devices." Shipbuilding & marine infrastructure 1(11) (2019): 4–8. http://dx.doi.org/10.15589/smi2019.1(11).1.

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17

Fedorov, V. A. "Electrostatic charging of an electrically insulated metal body streamlined by a plasma flow." Plasma Physics Reports 40, no. 10 (October 2014): 836–41. http://dx.doi.org/10.1134/s1063780x14100043.

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Na, Yeong-min, and Jong-kyu Park. "Design and Fabrication of Single-person Neighborhood Electric Vehicle with Streamlined Car Body." Korean Society of Manufacturing Process Engineers 17, no. 4 (August 30, 2018): 55–63. http://dx.doi.org/10.14775/ksmpe.2018.17.4.055.

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Baranov, S. A., M. D. Gamirullin, A. Ph Kiselev, A. P. Kuryachii, D. S. Sboev, S. N. Tolkachev, and S. L. Chernyshev. "Attenuation of cross-flow instability in three-dimensional boundary layer by means of multi-discharge actuator system." Доклады Академии наук 488, no. 2 (September 24, 2019): 147–52. http://dx.doi.org/10.31857/s0869-56524882147-152.

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Results of experiments in low-turbulence subsonic wind tunnel sustaining the possibility of significant attenuation of the cross-flow velocity and the intensity of stationary instability vortices due to the body force impact on three-dimensional boundary layer are presented. The unidirectional body force over a significant area of the streamlined surface has been created with the help of dielectric barrier discharge actuator.

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Janssen, John, G. R. Harbison, and J. E. Craddock. "Hatchetfishes Hold Horizontal Attitudes During Diagonal Descents." Journal of the Marine Biological Association of the United Kingdom 66, no. 4 (November 1986): 825–33. http://dx.doi.org/10.1017/s0025315400048451.

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Based on analysis of videotape records, species of the genus Argyropelecus are capable of swimming diagonally downwards at considerable speeds without altering their body postures. Morphological evidence strongly suggests that they are able to swim diagonally upwards in a similar way. Their distinctive hatchetlike profile presents a streamlined airfoil in both diagonal and horizontal movements, even though the body is not tilted. Modifications of the caudal musculature probably enable all hatchetfishes (including members of the other two genera, Polyipnus and Sternoptyx) to use the tail for propulsion for both diagonal and horizontal movements. The dorsal fin probably aids in diagonally downward movements and the pelvic and anal fins in diagonally upward movements, whilst the pectoral fins serve as stabilizers for these movements, and as an axis of rotation for striking at prey. The seemingly ungainly shape of the hatchetfish is the result of achieving a streamlined, fish-like shape for horizontal and diagonal movements without tilting of the body, presumably in order to maintain an effective camouflage in midwater.

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Satria, Dhimas, Dovan Pujangga Asmara Lanank Esiswitoyo, Ni Ketut Caturwati, Erny Listijorini, and Rina Lusiani. "Body Design Concept of Remotely Operated Vehicle (ROV) of Observation Class with the Method of Concept Screening and Concept Scoring." MATEC Web of Conferences 218 (2018): 02009. http://dx.doi.org/10.1051/matecconf/201821802009.

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The Remotely Operated Vehicle (ROV) underwater observation equipment has previously been developed, but it had restriction for not being hydrodynamic still due to the unique conditions of the Sunda Strait waters. This study aims to further develop the previously developed ROV by improving the design structure of the ROV body. The method of design concept selection used was concept screening and concept scoring. In concept screening, the initial concept was evaluated relatively to the same preferences using screening matrices. On the other hand the Concept Scoring was conducted by determining the relative performance value which was the assessment used to evaluate how the comparison between concepts and number as the comparison. The result of the study obtained the selected design concept, which was small ROV with streamlined / half-streamlined body geometry which had rear-middle rotor configuration as motion component of hydrodynamic 3 DOF (surge, heave, and yaw).

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Dragomir, S. S., C. E. M. Pearce, and J. Pevcari’ c. "Interpolations of Jensen's inequality." Tamkang Journal of Mathematics 34, no. 2 (June 30, 2003): 175–88. http://dx.doi.org/10.5556/j.tkjm.34.2003.265.

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Weighted and unweighted interpolations of general order are given for Jensen's integral inequality. Various upper-bound estimates are made for the differences between the interpolates and some convergence results erived. The results generalise and subsume a body of earlier work and employ streamlined proofs.

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Fukano, Tohru. "Generation of discrete frequency noise due to periodic vortex shedding from a streamlined body." Journal of the Acoustical Society of America 84, S1 (November 1988): S116. http://dx.doi.org/10.1121/1.2025700.

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Polyakov, A. F., and Yu L. Shekhter. "Simulation of porous transpiration cooling of the leading semicylindrical edge of a streamlined body." Thermal Engineering 58, no. 9 (September 2011): 748–51. http://dx.doi.org/10.1134/s0040601511090102.

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Duan, Xian Bao, Fu Cai Qian, and Ya Qin Guo. "Optimal Shape Design of a Body Located in Stokes Flow." Advanced Materials Research 320 (August 2011): 303–8. http://dx.doi.org/10.4028/www.scientific.net/amr.320.303.

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Formulations and numerical results for optimal shape design of a body located in the incompressible Stokes fluid flow are presented. The study is based on an optimal control theory. The optimal state is defined by the reduction of drag forces subjected to the body. The cost functional should be minimized satisfying the Stokes equations. The Shape sensitivity analysis of the cost functional was derived based on the adjoint method. For the numerical study, the optimal shape of the body which has a circular shape as an initial state can be finally obtained as the streamlined shape.

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Pierce, F. J., and S. K. Nath. "Interference Drag of a Turbulent Junction Vortex." Journal of Fluids Engineering 112, no. 4 (December 1, 1990): 441–46. http://dx.doi.org/10.1115/1.2909423.

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The interference drag identified with the junction of a streamlined cylindrical body and a flat plate was investigated. The junction drag was calculated from a set of detailed, self consistent, high quality data using a control volume approach. The drag for the isolated flat plate and streamlined cylinder making up the junction was calculated using boundary-layer solvers together with surface pressure measurements. For the particular and relatively thick body under consideration, the results show a significant increase in drag due to the junction. These and other available results indicate that the interference drag has a systematic dependence on the thickness to chord ratio. The junction vortex wake increases the downstream flat plate drag significantly. Because of this effect, a unique value for the drag force, drag coefficient, or induced drag coefficient for a junction vortex flow would require that the geometry be specified in detail. The induced drag and the total pressure losses identified with the junction are also reported.

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VERKHOTUROVA, IRINA VLADIMIROVNA. "SIMULATION OF BODY FLOW WITH A SEPARATED LIQUID FLOW IN A COMSOL MULTIPHYSICS ENVIRONMENT." Messenger AmSU, no. 93 (2021): 34–37. http://dx.doi.org/10.22250/jasu.93.7.

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The article presents the results of using the COMSOL Multiphysics environment to perform one of the laboratory works of the Aerodynamics module of the Hydrogas and Aerodynamics discipline. In the COMSOL Multiphysics environment, it is proposed to simulate the process of a laminar flow of a viscous incompressible fluid around bodies of various geometric shapes, which allows you to visually visualize the boundary layer, its separation from the surface of the streamlined body.

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Plakhov, Alexander. "Optimal Roughening of Convex Bodies." Canadian Journal of Mathematics 64, no. 5 (October 1, 2012): 1058–74. http://dx.doi.org/10.4153/cjm-2011-070-9.

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AbstractA body moves in a rare fied medium composed of point particles at rest. The particles make elastic reflections when colliding with the body surface and do not interact with each other. We consider a generalization of Newton’s minimal resistance problem: given two bounded convex bodiesC1andC2ℝ3such that C1⊂ c2⊂ and, minimize the resistance in the class of connected bodiesBsuch thatC1⊂ B ⊂C1. We prove that the infimum of resistance is zero; that is, there exist ”almost perfectly streamlined” bodies.

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Ribera, I., and A. N. Nilsson. "Morphometric patterns among diving beetles (Coleoptera: Noteridae, Hygrobiidae, and Dytiscidae)." Canadian Journal of Zoology 73, no. 12 (December 1, 1995): 2343–60. http://dx.doi.org/10.1139/z95-275.

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A study of shape and size in relation to swimming strategies among Hydradephaga, with an emphasis on Dytiscidae, was performed with nearly 1600 adult specimens belonging to the families Noteridae (2 species), Hygrobiidae (1 species), and Dytiscidae (74 species). The data were studied by means of bivariate correlations, scatter plots, and two multivariate statistical methods (factor and cluster analysis). The main morphometric groups found included (i) large to medium-sized, streamlined, wide species with the maximum width in the rear part of the body and the maximum height in the front part, with short tibiae and long tarsi; they are considered to be adapted to high-speed swimming in open waters; (ii) small to medium-sized species with a spherical body and long femora; they are considered to be adapted to manoeuvring in stagnant waters; (iii) small species with a discontinuous outline, a narrow body, and long, slender legs; they are considered to be poor swimmers in running waters; and (iv) small to medium-sized species having, in general, a streamlined, relatively high body with short, wide legs; they are considered to be adapted to crawling among dense vegetation or detritus. Despite the clear relationships between systematics and morphometry, most characters were found to be homoplastic a number of times within the families studied. This supports the adaptive interpretation of the morphometry of the species.

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Aleksyuk, A. I., V. P. Shkadova, and V. Ya Shkadov. "Formation, evolution, and decay of a vortex street in the wake of a streamlined body." Moscow University Mechanics Bulletin 67, no. 3 (May 2012): 53–61. http://dx.doi.org/10.3103/s0027133012030016.

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A. Bidokhti, Amin, and Aliakbar Bidokhti. "Flow Visualization of Internal Waves and Wakes of a Streamlined Body in a Stratified Fluid." Journal of Applied Fluid Mechanics 9, no. 2 (March 1, 2016): 635–41. http://dx.doi.org/10.18869/acadpub.jafm.68.225.24419.

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Vorus, William S. "Ambient Supercavities of Slender Bodies of Revolution." Journal of Ship Research 30, no. 03 (September 1, 1986): 215–19. http://dx.doi.org/10.5957/jsr.1986.30.3.215.

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Slender-body theory is applied in an analysis of the flow about the general supercavitating streamlined body of revolution. The formulation is specialized to the case of ambient cavity pressure (zero cavitation number) for the specific analysis conducted. Numerical procedures are outlined. The methodology is demonstrated in calculating the cavity shapes, surface velocity distributions, and cavity form drag coefficients for three idealized bodies. These are the convex paraboloid, the conical frustrum, and the concave paraboloid. Characteristic differences in the flows in each of the cases are discussed.

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Yaakob, Omar B., Yasser M. Ahmed, M. Rajali Jalal, A. A. Faizul, Koh K. Koh, and Tarmizi J. Zaid. "Hydrodynamic Design of New Type of Artificial Reefs." Applied Mechanics and Materials 819 (January 2016): 406–19. http://dx.doi.org/10.4028/www.scientific.net/amm.819.406.

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The purpose of this research work is to study the hydrodynamic characteristics of a new type of artificial reef structure, in order to provide a structure with low flow resistance, which will be a more suitable shelter for fishes and marine organisms. The idea of the new artificial reef is based on the streamlined bicycle helmet design concept. The hydrodynamic characteristics of the helmet and hollow cube artificial reefs (ARs) of the same volume have been studied at different water depths and wave frequencies of Malaysia seas using Computational Fluid Dynamics (CFD) method. The finite volume RANSE (Reynolds-Averaged Navier-Stokes Eqs.) code Ansys CFX was used for calculating the reefs drag force (FD) and flow characteristics, while the potential flow code Ansys Aqwa was used for calculating the reefs inertia force (FI). The Shear Stress Transport (SST) turbulence model was used in the RANSE code. The results of the two ARs were then compared for studying the hydrodynamic improvement due to the use of streamlined helmet artificial reef on the flow pattern around it. The streamlined body of the helmet artificial reef enhances the flow pattern at the aft region of the reef and provides flow zones with moderate flow speed at this area, which can help fishes and marine organisms from finding good shelter. The special shape of the different openings in the body of the helmet artificial reef improves the condition of the flow velocity distribution inside the unit than that of the hollow cube unit, which can increase the amount of the nutrient to the living fishes and organisms inside the reef.

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Om, Jai. "The Effects of Cell Phone Radiation on the Human Body: An Overview." European Journal of Engineering Research and Science 4, no. 3 (March 26, 2019): 166–69. http://dx.doi.org/10.24018/ejers.2019.4.3.1192.

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In this research article, an overview is provided of all the plausible effects that cell phone radiation might have on a human body. The number of cell of regular cell phone users has exploded around the world, and cell phones have become an integral part of our lives in the recent past. Therefore, this paper strives to answers public questions regarding the safety of using cell phones. It analyses previous research that has been done in the field to provide concise answers. The article also supports the motion that cell phones can be harmful in the long run; however, there is no conclusive evidence. The future research should be made more streamlined, and focus on human body systems.

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Chiu, Forng-Chen, Jenhwa Guo, Yi-Yuan Chang, Chieh-Chih Wang, and Jr-Ping Wang. "On the Linear Hydrodynamic Forces and the Maneuverability of an Unmanned Untethered Submersible with Streamlined Body." Journal of the Society of Naval Architects of Japan 1996, no. 180 (1996): 241–49. http://dx.doi.org/10.2534/jjasnaoe1968.1996.180_241.

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Ramos, Rui, Maria Novais, Tiago Barbosa, António Silva, Vishveshwar Mantha, Abel Rouboa, and Daniel Marinho. "THE EFFECT OF BODY POSITIONS ON DRAG DURING THE STREAMLINED GLIDE: A THREE-DIMENSIONAL CFD ANALYSIS." Journal of Biomechanics 45 (July 2012): S633. http://dx.doi.org/10.1016/s0021-9290(12)70634-6.

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Zhang, Yong Qiang, Wei Dong Wu, and Wan Zhen Zhou. "Design and Implementation of Electrostatic Parameters Network Monitoring System." Applied Mechanics and Materials 494-495 (February 2014): 857–60. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.857.

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This paper presents an electrostatic parameters network monitoring system, which has achieved three types of devices, those are static dynamic potential test unit, non-contract electrostatic potential test unit and body static parameter test unit. In these three devices embedded microcontroller system, by deploying streamlined TCP/IP protocol stack to encode and transmit the data, and the PC receives data for display and then stores in the database.

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Varaksin, A. Yu, and M. V. Protasov. "The effect of gas injection on the protection of body surfaces streamlined by a two-phase flow." High Temperature 55, no. 6 (November 2017): 945–48. http://dx.doi.org/10.1134/s0018151x17060177.

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Cappaert, Jane M., David L. Pease, and John P. Troup. "Three-Dimensional Analysis of the Men‘s 100-m Freestyle during the 1992 Olympic Games." Journal of Applied Biomechanics 11, no. 1 (February 1995): 103–12. http://dx.doi.org/10.1123/jab.11.1.103.

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Twelve male 100-m freestyle swimmers were videotaped during the 1992 Olympic Games. Four cameras, two above water and two below, recorded the same stroke cycle of the swimmer at approximately the 40- to 45-m mark. The whole body and the recovering arms were digitized from the videotapes to recreate a complete stroke cycle. Body position variables and hand reaction forces (Schleihauf, 1979) were calculated. Swimmers were divided into elite and subelite groups based on their swimming velocity and were compared for differences in biomechanical variables. Elites used slightly lower hand forces while maintaining a higher propelling efficiency. Subelites had opposite rotations about the longitudinal axis of the body rather than symmetrical body roll. The elite swimmers were different from subelites in that their pulling patterns were more efficient and their body position was more streamlined. These variables assisted them in achieving faster swimming velocities without requiring higher propulsive forces.

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Hai, Huang, Zhou Zexing, Li Jiyong, Tang Qirong, Zhang Wanli, and Gang Wang. "Investigation on the mechanical design and manipulation hydrodynamics for a small sized, single body and streamlined I-AUV." Ocean Engineering 186 (August 2019): 106106. http://dx.doi.org/10.1016/j.oceaneng.2019.06.011.

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Pigeot, Sébastien, Paul Emile Bourgine, Jaquiery Claude, Celeste Scotti, Adam Papadimitropoulos, Atanas Todorov, Christian Epple, Giuseppe M. Peretti, and Ivan Martin. "Orthotopic Bone Formation by Streamlined Engineering and Devitalization of Human Hypertrophic Cartilage." International Journal of Molecular Sciences 21, no. 19 (September 30, 2020): 7233. http://dx.doi.org/10.3390/ijms21197233.

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Most bones of the human body form and heal through endochondral ossification, whereby hypertrophic cartilage (HyC) is formed and subsequently remodeled into bone. We previously demonstrated that HyC can be engineered from human mesenchymal stromal cells (hMSC), and subsequently devitalized by apoptosis induction. The resulting extracellular matrix (ECM) tissue retained osteoinductive properties, leading to ectopic bone formation. In this study, we aimed at engineering and devitalizing upscaled quantities of HyC ECM within a perfusion bioreactor, followed by in vivo assessment in an orthotopic bone repair model. We hypothesized that the devitalized HyC ECM would outperform a clinical product currently used for bone reconstructive surgery. Human MSC were genetically engineered with a gene cassette enabling apoptosis induction upon addition of an adjuvant. Engineered hMSC were seeded, differentiated, and devitalized within a perfusion bioreactor. The resulting HyC ECM was subsequently implanted in a 10-mm rabbit calvarial defect model, with processed human bone (Maxgraft®) as control. Human MSC cultured in the perfusion bioreactor generated a homogenous HyC ECM and were efficiently induced towards apoptosis. Following six weeks of in vivo implantation, microcomputed tomography and histological analyses of the defects revealed an increased bone formation in the defects filled with HyC ECM as compared to Maxgraft®. This work demonstrates the suitability of engineered devitalized HyC ECM as a bone substitute material, with a performance superior to a state-of-the-art commercial graft. Streamlined generation of the devitalized tissue transplant within a perfusion bioreactor is relevant towards standardized and automated manufacturing of a clinical product.

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Gusakov, Andrey A., Artem S. Kosolapov, Dmitriy M. Markovich, Andrey V. Mityakov, Vladimir Y. Mityakov, Sergey A. Mozhayskiy, Alexander S. Nebuchinov, and Sergey Z. Sapozhnikov. "Simultaneous PIV and Gradient Heat Flux Measurement of a Circular Cylinder in Cross-Flow." Applied Mechanics and Materials 629 (October 2014): 444–49. http://dx.doi.org/10.4028/www.scientific.net/amm.629.444.

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All heat transfer processes from a solid body to a gas or a liquid are connected with flow characteristics in the vicinity of the streamlined body surface. As far as plenty of flow properties are changing rapidly, it is important to know both heat transfer and flow properties in a certain location and at a certain time. We present a new method of the simultaneous velocity field measurement and heatmetry. By “heatmetry” we mean science and practice of the heat flux measurement (by analogy with the thermometry). The velocity field was obtained by the particle image velocimetry and the local heat flux – by the gradient heat flux sensor. The advantage of the method was exemplified on the heat transfer from a circular cylinder in cross flow.

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Jeans, Tiger L., A. Gordon L. Holloway, George D. Watt, and Andrew G. Gerber. "A Force Estimation Method for Viscous Separated Flow Over Slender Axisymmetric Bodies With Tapered Tails." Journal of Ship Research 54, no. 01 (March 1, 2010): 53–67. http://dx.doi.org/10.5957/jsr.2010.54.1.53.

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A new impulse method for modeling the normal force distributions along slender axisymmetric bodies with tapered tails is presented. This method is based on a decomposition of the hydrodynamic impulse along the body into an inviscid, profile-dependent component and a viscous, profile-independent component. It is applicable to separated flows up to 30 deg of incidence. Model results for the normal force distributions, total normal force, and total moment on axisymmetric streamlined bodies with tapered tails are compared with computational fluid dynamics (CFD) simulations and experimental data up to a Reynolds number of 23 × 106 with good agreement. The model was also tested on a missile-shaped body and was found to be in excellent agreement with experimental results.

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Swetz, Frank, and Bruce Frahm. "Sharing Teaching Ideas: The Incredible Shrinking Can: Mathematics of Diminishing Returns Revealed and Gening Your Money's Worth in Business Mathematics." Mathematics Teacher 86, no. 8 (November 1993): 642–45. http://dx.doi.org/10.5951/mt.86.8.0642.

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I like to drink vegetable juice with my lunch. Small cans of this juice are sold in our school cafeteria. Several weeks ago, I noticed a change-the former steel container had been replaced by a streamlined aluminum can and the previous paper label had been eliminated by painting the producetJs message on the cylinder's sw-face. This new can is very attractive. However, when I picked it up, I noticed several disturbing and noncosmetic differences: the top of the can was deeply recessed into the body and a false bottom had been added.

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Șerban, Cecilia, and Gabriela Grigoraş. "Morphology of the Genus Gymnocephalus (Pisces) from the Lower Danube River." Transylvanian Review of Systematical and Ecological Research 21, no. 2 (August 1, 2019): 49–68. http://dx.doi.org/10.2478/trser-2019-0012.

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Abstract The current study completed the information regarding the phenotypic variability in the Danube ruffe (Gymnocephalus baloni). We also assessed the phylogenetic relationship of G. baloni with the other two species of the genus Gymnocephalus from the Lower Danube River. Ten morphological characters were the most useful together for discriminating between G. baloni and G. cernua from the Lower Danube River. In addition, we found a more streamlined body shape in G. baloni compared with the described holotype, which could be in connection with fish phenotypic response to ecological characteristics of the Lower Danube River.

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Yu, Junzhi, Shuo Wang, and Min Tan. "A simplified propulsive model of bio-mimetic robot fish and its realization." Robotica 23, no. 1 (January 2005): 101–7. http://dx.doi.org/10.1017/s0263574704000426.

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This paper presents a simplified kinematics propulsive model for carangiform propulsion. The carangiform motion is modeled as a serial $N$-joint oscillating mechanism that is composed of two basic components: the streamlined fish body represented by a planar spline curve and its lunate caudal tail by an oscillating foil. The speed of fish's straight swimming is adjusted by modulating the joint's oscillatory frequency, and its orientation is tuned by different joint's deflections. The experimental results showed that the proposed simplified propulsive model could be a viable candidate for application in aquatic swimming vehicles.

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Wake, Melissa, and Susan A. Clifford. "Population health bio-phenotypes in 11–12 year old children and their midlife parents: Growing Up in Australia’s Child Health CheckPoint." BMJ Open 9, Suppl 3 (July 2019): 1–2. http://dx.doi.org/10.1136/bmjopen-2019-030833.

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In an ambitious undertaking, Growing Up in Australia’s Child Health CheckPoint streamlined and implemented wide-ranging population phenotypes and biosamples relevant to non-communicable diseases in nearly 1900 parent–child dyads throughout Australia at child aged 11–12 years. This BMJ Open Special Issue describes the methodology, epidemiology and parent–child concordance of 14 of these phenotypes, spanning cardiovascular, respiratory, bone, kidney, hearing and language, body composition, metabolic profiles, telomere length, sleep, physical activity, snack choice and health-related quality of life. The Special Issue also includes a cohort summary and study methodology paper.

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Ismagilov, D. R., and R. V. Sidelnikov. "Features of numerical simulation of hypersonic flow around simple bodies." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 2 (June 30, 2015): 49–54. http://dx.doi.org/10.38013/2542-0542-2015-2-49-54.

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The analysis of the possibility of using the numerical approximation schemes streams Roe FDS and AUSM + to meet the challenges of hypersonic aerodynamics and research trends in the perturbed region ahead streamlined blunt body to determine the laws of thermal and gas-dynamic processes and the establishment of the characteristics associated with the development of the necessary thermal protection of aircraft. Based on a comparison of the data with the experimental results revealed that the method of splitting the flow AUSM + is able to solve the problem of hypersonic flow around bodies with acceptable accuracy.

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Shahbaz, Muhammad Hamza, Kashif Amjad, Naqash Ahmad, Arslan Ahmed Amin, Sajid Iqbal, Muhammad Gufran Khan, and Muhammad Adnan. "A streamlined 17-level cascaded H-bridge multilevel converter with solar PV integration." Bulletin of Electrical Engineering and Informatics 10, no. 2 (April 1, 2021): 598–608. http://dx.doi.org/10.11591/eei.v10i2.2764.

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The quest for a green electrical power system has increased the use of renewable energy resources and power electronic converters in the existing power system. These power electronic converters, however, are a major cause of harmonics and result in the degradation of power quality. In the last two decades, researchers have proposed various designs of multilevel converters to minimize these harmonic distortions, however, a comprehensive solution for stand-alone solar photovoltaic (PV) systems with low total harmonic distortion (THD) is still missing in the present body of knowledge. This paper proposes a single-phase 17-level cascaded H-bridge multilevel converter (CHMC) model for a stand-alone system using solar PV arrays. The proposed model employs eight different flexible PV arrays that can be replaced with DC voltage sources when required to meet the load demand. The proposed model does not include any capacitor and filter thus saving a lot of cost in the overall system. The model has been implemented in the Simulink environment using a model-based design approach. The simulation results show that the proposed model has reduced the THD to almost 7% as compared to the existing models. The cost comparison of the proposed converter also proved its economic benefit over other types.

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WU, Zhenfeng, Yanzhong HUO, Wangcai DING, and Zihao XIE. "Bionic shape design of electric locomotive and aerodynamic drag reduction." Archives of Transport 4, no. 48 (December 31, 2018): 99–109. http://dx.doi.org/10.5604/01.3001.0012.8369.

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Bionics has been widely used in many fields. Previous studies on the application of bionics in locomotives and vehicles mainly focused on shape optimisation of high-speed trains, but the research on bionic shape design in the electric locomotive field is rare. This study investigated a design method for streamlined electric locomotives according to the principles of bionics. The crocodiles were chosen as the bionic object because of their powerful and streamlined head shape. Firstly, geometric characteristic lines were extracted from the head of a crocodile by analysing the head features. Secondly, according to the actual size requirements of the electric locomotive head, a free-hand sketch of the bionic electric locomotive head was completed by adjusting the position and scale of the geometric characteristic lines. Finally, the non-uniform rational B-splines method was used to establish a 3D digital model of the crocodile bionic electric locomotive, and the main and auxiliary control lines were created. To verify the drag reduction effect of the crocodile bionic electric locomotive, numerical simulations of aerodynamic drag were performed for the crocodile bionic and bluff body electric locomotives at different speeds in open air by using the CFD software, ANSYS FLUENT16.0. The geometric models of crocodile bionic and bluff body electric locomotives were both marshalled with three cars, namely, locomotive + middle car + locomotive, and the size of the two geometric models was uniform. Dimensions and grids of the flow field were defined. And then, according to the principle of motion relativity, boundary conditions of flow field were defined. The results indicated that the crocodile bionic electric locomotive demonstrated a good aerodynamic performance. At the six sampling speeds in the range of 40–240 km/h, the aerodynamic drag coefficient of the crocodile bionic electric locomotive decreased by 7.7% on the average compared with that of the bluff body electric locomotive.

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Journal articles on the topic 'Streamlined body'

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