Log in

Relevant bibliographies by topics / Stream Convecting Vortex / Journal articles

To see the other types of publications on this topic, follow the link: Stream Convecting Vortex.

Journal articles on the topic 'Stream Convecting Vortex'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Stream Convecting Vortex.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Garmann, D. J., and M. R. Visbal. "Interactions of a streamwise-oriented vortex with a finite wing." Journal of Fluid Mechanics 767 (February 24, 2015): 782–810. http://dx.doi.org/10.1017/jfm.2015.51.

Full text

Abstract:

AbstractA canonical study is developed to investigate the unsteady interactions of a streamwise-oriented vortex impinging upon a finite surface using high-fidelity simulation. As a model problem, an analytically defined vortex superimposed on a free stream is convected towards an aspect-ratio-six ($\mathit{AR}=6$) plate oriented at an angle of ${\it\alpha}=4^{\circ }$ and Reynolds number of $\mathit{Re}=20\,000$ in order to characterize the unsteady modes of interaction resulting from different spanwise positions of the incoming vortex. Outboard, tip-aligned and inboard positioning are shown t

APA, Harvard, Vancouver, ISO, and other styles

2

Kislitsyn, S. A., and V. S. Berdnikov. "Numerical studies of the advective flow of heptadecane in a horizontal layer with a longitudinal temperature gradient at the lower boundary." Journal of Physics: Conference Series 2119, no. 1 (2021): 012085. http://dx.doi.org/10.1088/1742-6596/2119/1/012085.

Full text

Abstract:

Abstract Numerical studies of the convective flow of heptadecane in a horizontal layer with a suddenly applied longitudinal temperature gradient at the lower high-thermal conductivity boundary have been carried out by the finite element method. A system of nonstationary dimensionless equations of free convection containing stream function, velocity vortex, and temperature as variables was solved. The calculations were carried out with a free upper boundary with and without taking into account the influence of the thermocapillary effect.

APA, Harvard, Vancouver, ISO, and other styles

3

Никулина, Светлана Анатольевна, Анатолий Викторович Перминов та Татьяна Петровна Любимова. "Конвективные режимы псевдопластической жидкости в квадратной полости при воздействии высокочастотных вибраций в условиях пониженной гравитации". Computational Continuum Mechanics 17, № 2 (2024): 202–18. http://dx.doi.org/10.7242/1999-6691/2024.17.2.19.

Full text

Abstract:

In this paper, we investigate convective modes of pseudoplastic fluid in a square cavity with solid perfectly heat-conducting boundaries under reduced gravity. The cavity performs vertical linearly polarized high-frequency vibrations. Between the vertical walls of the cavity a temperature drop is prescribed in the direction perpendicular to vibrations and the field of gravity. The fluid rheology is described using the Williamson model. The problem is solved based on the averaged thermovibration convection equations for nonlinear viscous fluids. The vibration intensity is determined by the vibr

APA, Harvard, Vancouver, ISO, and other styles

4

Radomsky, R. W., and K. A. Thole. "High Free-Steam Turbulence Effects on Endwall Heat Transfer for a Gas Turbine Stator Vane." Journal of Turbomachinery 122, no. 4 (2000): 699–708. http://dx.doi.org/10.1115/1.1312807.

Full text

Abstract:

High free-stream turbulence along a gas turbine airfoil and strong secondary flows along the endwall have both been reported to increase convective heat transfer significantly. This study superimposes high free-stream turbulence on the naturally occurring secondary flow vortices to determine the effects on the flowfield and the endwall convective heat transfer. Measured flowfield and heat transfer data were compared between low free-stream turbulence levels (0.6 percent) and combustor simulated turbulence levels (19.5 percent) that were generated using an active grid. These experiments were co

APA, Harvard, Vancouver, ISO, and other styles

5

Stechman, Daniel M., Robert M. Rauber, Greg M. McFarquhar, Brian F. Jewett, and David P. Jorgensen. "Interaction of an Upper-Tropospheric Jet with a Squall Line Originating along a Cold Frontal Boundary." Monthly Weather Review 144, no. 11 (2016): 4197–219. http://dx.doi.org/10.1175/mwr-d-16-0044.1.

Full text

Abstract:

Abstract On 8 June 2003, an expansive squall line along a surface cold frontal boundary was sampled during the Bow Echo and Mesoscale Convective Vortex Experiment. The Naval Research Laboratory P-3 aircraft and the National Oceanic and Atmospheric Administration P-3 aircraft simultaneously sampled the leading and trailing edge of this squall line, respectively, with X-band Doppler radars. Data from these two airborne radar systems have been synthesized to produce a pseudo-quad-Doppler analysis of the squall line, yielding a detailed three-dimensional kinematic analysis of its structure. A simu

APA, Harvard, Vancouver, ISO, and other styles

6

Berg, Elizabeth M., Louis J. Urtecho, Siddharth Krishnamoorthy, Elizabeth A. Silber, Andrew Sparks, and Daniel C. Bowman. "An Accurate and Automated Convective Vortex Detection Method for Long-Duration Infrasound Microbarometer Data." Journal of Atmospheric and Oceanic Technology 41, no. 3 (2024): 341–54. http://dx.doi.org/10.1175/jtech-d-23-0037.1.

Full text

Abstract:

Abstract Heating of the surficial layer of the atmosphere often generates convective vortices, known as “dust devils” when they entrain visible debris. Convective vortices are common on both Earth and Mars, where they affect the climate via dust loading, contribute to wind erosion, impact the efficiency of photovoltaic systems, and potentially result in injury and property damage. However, long-duration terrestrial convective vortex activity records are rare. We have developed a high-precision and high-recall method to extract convective vortex signatures from infrasound microbarometer data st

APA, Harvard, Vancouver, ISO, and other styles

7

Kumar, Bhaskar, and Sanjay Mittal. "On the origin of the secondary vortex street." Journal of Fluid Mechanics 711 (September 24, 2012): 641–66. http://dx.doi.org/10.1017/jfm.2012.421.

Full text

Abstract:

AbstractThe origin of the secondary vortex street, observed in the far wake in the flow past a circular cylinder, is investigated. The Reynolds number, based on the diameter of the cylinder, is 150. The von Kármán vortex street, which originates in the near wake, decays exponentially downstream of the cylinder. Beyond the region of decay, a broad band of frequencies are selectively amplified, leading to the formation of a secondary vortex street consisting of packets of large-scale vortex structures. The streamwise location of the onset of the instability, frequency of the generation of packet

APA, Harvard, Vancouver, ISO, and other styles

8

G, Krishna Veni, Satyanarayana Chirala, and Chenna Krishnareddy M. "Radial Basis Function Based Partition of Unity Method for Two-Dimensional Unsteady Convection Diffusion Equations." Indian Journal of Science and Technology 16, no. 27 (2023): 2090–101. https://doi.org/10.17485/IJST/v16i27.336.

Full text

Abstract:

Abstract <strong>Objective:</strong> The present method aims to solve and investigate the efficiency, accuracy, and stability of the 2D unsteady Navier-Stokes equation in stream function vorticity formulation and Taylor’s vortex problem. <strong>Method:</strong> RBF partition of unity method (RBF-PUM) was implemented to solve the twodimensional Navier- Stokes equations in stream function vorticity formulation and Taylor’s vortex problem. <strong>Findings:</strong> RBF-PUM results show good agreement with the exact solutions. The numerical approach is found

APA, Harvard, Vancouver, ISO, and other styles

9

Chang, Keun-Shik, and Jong-Youb Sa. "The effect of buoyancy on vortex shedding in the near wake of a circular cylinder." Journal of Fluid Mechanics 220 (November 1990): 253–66. http://dx.doi.org/10.1017/s002211209000324x.

Full text

Abstract:

The phenomenon of vortex shedding from a heated/cooled circular cylinder has been investigated numerically in the mixed natural and forced convection regimes. Accuracy of the computation was achieved by the fourth-order Hermitian relation applied to the contravariant velocity components in the convection terms of the vorticity transport equation, and by the far-boundary stream-function condition of an integral-series form developed by the authors. Purely periodic flows at Re = 100, efficiently established through the use of a direct elliptic solver called the SEVP, was found to degenerate into

APA, Harvard, Vancouver, ISO, and other styles

10

Moharreri, S. S., B. F. Armaly, and T. S. Chen. "Measurements in the Transition Vortex Flow Regime of Mixed Convection Above a Horizontal Heated Plate." Journal of Heat Transfer 110, no. 2 (1988): 358–65. http://dx.doi.org/10.1115/1.3250492.

Full text

Abstract:

Experimental results covering the transition vortex flow regime of mixed convection over a heated, horizontal flat plate are presented. A criterion for the onset of vortex instability as a function of critical Reynolds and Grashof numbers was established with the aid of a flow visualization technique. The three-dimensional nature of this flow regime was documented through both velocity and temperature measurements using laser-Doppler and hot/cold-wire anemometers, respectively. A higher buoyancy force, through a higher plate temperature or a larger downstream distance, and/or a lower free-stre

APA, Harvard, Vancouver, ISO, and other styles

11

Kanna, R., Sayed Sayeed Ahmad, P. Venkata Reddy, et al. "Investigation Of Forced Convection Heat Transfer From A Heater Mounted Ina Cavity Wall Using Various Nanofluids." E3S Web of Conferences 128 (2019): 07002. http://dx.doi.org/10.1051/e3sconf/201912807002.

Full text

Abstract:

Forced convection heat transfer from heater mounted in a cavity wall is investigated to reveal the relation among nanofluid properties. The base fluid is considered as water. The present study is focused on forced convection heat transfer from square heater subject to inflow and outflow inside a squarecavity. The interesting physics will be reported in connection with volume fraction, Reynolds number and nanomaterial properties. It is found that for a particular Reynolds number when nanomaterial is introduced the local heat transfer is increased. The wall attached vortex attributes a constant

APA, Harvard, Vancouver, ISO, and other styles

12

Kumar De, Arnab, and Amaresh Dalal. "Numerical Study of Laminar Forced Convection Fluid Flow and Heat Transfer From a Triangular Cylinder Placed in a Channel." Journal of Heat Transfer 129, no. 5 (2006): 646–56. http://dx.doi.org/10.1115/1.2712848.

Full text

Abstract:

Computational study of two-dimensional laminar flow and heat transfer past a triangular cylinder placed in a horizontal channel is presented for the range 80≤Re≤200 and blockage ratio 1/12≤β≤1/3. A second-order accurate finite volume code with nonstaggered arrangement of variables is developed employing momentum interpolation for the pressure-velocity coupling. Global mode of cross-stream velocity oscillations predict the first bifurcation point increases linearly with blockage ratio with no second bifurcation found in the range of Re studied. The Strouhal number and rms of lift coefficient in

APA, Harvard, Vancouver, ISO, and other styles

13

Dunkerton, T. J., M. T. Montgomery, and Z. Wang. "Tropical cyclogenesis in a tropical wave critical layer: easterly waves." Atmospheric Chemistry and Physics Discussions 8, no. 3 (2008): 11149–292. http://dx.doi.org/10.5194/acpd-8-11149-2008.

Full text

Abstract:

Abstract. The development of tropical depressions within tropical waves over the Atlantic and eastern Pacific is usually preceded by a "surface low along the wave" as if to suggest a hybrid wave-vortex structure in which flow streamlines not only undulate with the waves, but form a closed circulation in the lower troposphere surrounding the low. This structure, equatorward of the easterly jet axis, resembles the familiar critical layer of waves in shear flow, a flow configuration which arguably provides the simplest conceptual framework for tropical cyclogenesis resulting from tropical waves,

APA, Harvard, Vancouver, ISO, and other styles

14

Zhu, Baoshan, Jun Lei, and Shuliang Cao. "Numerical Simulation of Vortex Shedding and Lock-in Characteristics for a Thin Cambered Blade." Journal of Fluids Engineering 129, no. 10 (2007): 1297–305. http://dx.doi.org/10.1115/1.2776964.

Full text

Abstract:

In this paper, vortex-shedding patterns and lock-in characteristics that vortex-shedding frequency synchronizes with the natural frequency of a thin cambered blade were numerically investigated. The numerical simulation was based on solving the vorticity-stream function equations with the fourth-order Runge–Kutta scheme in time and the Chakravaythy–Oscher total variation diminishing (TVD) scheme was used to discretize the convective term. The vortex-shedding patterns for different blade attack angles were simulated. In order to confirm whether the vortex shedding would induce blade self-oscill

APA, Harvard, Vancouver, ISO, and other styles

15

Pasipoularides, Ares, Ming Shu, Ashish Shah, Michael S. Womack, and Donald D. Glower. "Diastolic right ventricular filling vortex in normal and volume overload states." American Journal of Physiology-Heart and Circulatory Physiology 284, no. 4 (2003): H1064—H1072. http://dx.doi.org/10.1152/ajpheart.00804.2002.

Full text

Abstract:

Functional imaging computational fluid dynamics simulations of right ventricular (RV) inflow fields were obtained by comprehensive software using individual animal-specific dynamic imaging data input from three-dimensional (3-D) real-time echocardiography (RT3D) on a CRAY T-90 supercomputer. Chronically instrumented, lightly sedated awake dogs ( n = 7) with normal wall motion (NWM) at control and normal or diastolic paradoxical septal motion (PSM) during RV volume overload were investigated. Up to the E-wave peak, instantaneous inflow streamlines extended from the tricuspid orifice to the RV e

APA, Harvard, Vancouver, ISO, and other styles

16

Zhang, X. "Turbulence Measurements of a Longitudinal Vortex Generated by an Inclined Jet in a Turbulent Boundary Layer." Journal of Fluids Engineering 120, no. 4 (1998): 765–71. http://dx.doi.org/10.1115/1.2820736.

Full text

Abstract:

A longitudinal vortex in a flat-plate turbulent boundary layer was examined in a wind tunnel experiment using Laser Doppler Anemometry. The vortex was produced by an inclined round jet (D = 14 mm) in the turbulent boundary layer (δ0.99 ≈ 25 mm). The jet nozzle was positioned at pitch and skew angles of 45 deg to the oncoming stream, and the jet speed ratios (jet speed/freestream flow speed) were 0.5, 1.0, and 1.5. The flow was characterized by embedded vortices, induced high turbulent kinetic energy peak, local areas of high primary shear stress, and negative shear stress. Two types of normal

APA, Harvard, Vancouver, ISO, and other styles

17

Nikulina, S. A., A. V. Perminov, and T. P. Lyubimova. "Thermal vibrational convection of a pseudoplastic fluid in a rectangular cavity." Вестник Пермского университета. Физика, no. 3 (2020): 14–23. http://dx.doi.org/10.17072/1994-3598-2020-3-14-23.

Full text

Abstract:

Thermal vibrational convection of a pseudoplastic fluid in a closed rectangular cavity, which is in zero gravity and performing longitudinal high-frequency linearly polarized vibrations, is studied. The temperature gradient is perpendicular to the direction of vibration. The system of equations of thermovibrational convection of a Williamson pseudoplastic fluid is given. The problem was solved by the finite difference method. The effect of vibrations on the structure and intensity of flows is investigated. The magnitude of the vibrational effect on the liquid was determined by the vibrational

APA, Harvard, Vancouver, ISO, and other styles

18

Chang, Chih-Pei, Mong-Ming Lu, and Hock Lim. "Monsoon Convection in the Maritime Continent: Interaction of Large-Scale Motion and Complex Terrain." Meteorological Monographs 56 (April 1, 2016): 6.1–6.29. http://dx.doi.org/10.1175/amsmonographs-d-15-0011.1.

Full text

Abstract:

Abstract The Asian monsoon is a planetary-scale circulation system powered by the release of latent heat, but important features of deep convection and rainfall distribution cannot be adequately represented by the large-scale patterns. This is mainly due to the strong influences of terrain that are important across a wide range of horizontal scales, especially over the Maritime Continent where the complex terrain has a dominant effect on the behavior of convective rainfall during the boreal winter monsoon. This chapter is a review and summary of published results on the effects on monsoon conv

APA, Harvard, Vancouver, ISO, and other styles

19

Hossain, Mosharf, Nepal Roy, and Anwar Hossain. "Boundary layer flow and heat transfer in a micropolar fluid past a permeable at plate." Theoretical and Applied Mechanics 40, no. 3 (2013): 403–25. http://dx.doi.org/10.2298/tam1303403h.

Full text

Abstract:

An analysis is performed to study the shear stress, the couple-stress and heat transfer characteristics of a laminar mixed convection boundary layer flow of a micropolar fluid past an isothermal permeable plate. The governing nonsimilar boundary layer equations are analyzed using the (i) series solution for small ?, (ii) asymptotic solution for large ? and (iii) primitive-variable formulation and the stream function formulation are being used for all ?. The effects of the material parameters, such as, the vortex viscosity parameter, K, and the transpiration parameter, s, on the shear stress, t

APA, Harvard, Vancouver, ISO, and other styles

20

Martins, Luis-Filipe, and Ahmed F. Ghoniem. "Simulation of the Nonreacting Flow in a Bluff-Body Burner; Effect of the Diameter Ratio." Journal of Fluids Engineering 115, no. 3 (1993): 474–84. http://dx.doi.org/10.1115/1.2910163.

Full text

Abstract:

Axisymmetric vortex simulation is used to study the unsteady dynamics of the flowfield generated by the interaction between two concentric jets initially separated by a thick bluff-body. The computational scheme treats convective transport in a Lagrangian sense by discretizing the vorticity into a number of finite-area vortex ring elements which move along particle trajectories during each convective substep, thus reducing the numerical diffusion and allowing simulations at high Reynolds number. In this paper, investigation is focused on the time-dependent dynamics and the effect of the diamet

APA, Harvard, Vancouver, ISO, and other styles

21

Nguyen, Leon T., and John Molinari. "Rapid Intensification of a Sheared, Fast-Moving Hurricane over the Gulf Stream." Monthly Weather Review 140, no. 10 (2012): 3361–78. http://dx.doi.org/10.1175/mwr-d-11-00293.1.

Full text

Abstract:

Abstract Hurricane Irene (1999) rapidly intensified from 65 to 95 kt (~33.4 to 48.9 m s−1) in 18 h. During the rapid intensification (RI) period, the northeastward storm motion increased from 10 to 18 m s−1, the ambient southwesterly vertical wind shear increased from 6–7 to 10–13 m s −1, and the downshear tilt of the inner core vortex increased. The azimuthal wavenumber-1 asymmetric convection that developed was consistent with a superposition of shear-induced and storm motion–induced forcing for vertical motion downshear and ahead of the center. Although the diabatic heating remained strongl

APA, Harvard, Vancouver, ISO, and other styles

22

Dunkerton, T. J., M. T. Montgomery, and Z. Wang. "Tropical cyclogenesis in a tropical wave critical layer: easterly waves." Atmospheric Chemistry and Physics 9, no. 15 (2009): 5587–646. http://dx.doi.org/10.5194/acp-9-5587-2009.

Full text

Abstract:

Abstract. The development of tropical depressions within tropical waves over the Atlantic and eastern Pacific is usually preceded by a "surface low along the wave" as if to suggest a hybrid wave-vortex structure in which flow streamlines not only undulate with the waves, but form a closed circulation in the lower troposphere surrounding the low. This structure, equatorward of the easterly jet axis, is identified herein as the familiar critical layer of waves in shear flow, a flow configuration which arguably provides the simplest conceptual framework for tropical cyclogenesis resulting from tr

APA, Harvard, Vancouver, ISO, and other styles

23

Shangguan, Yanqin, Xian Wang, Fei Cao, and Yandan Zhu. "High-resolution simulation of film cooling with blowing ratio and inclination angle effects based on hybrid thermal lattice Boltzmann method." Thermal Science, no. 00 (2021): 286. http://dx.doi.org/10.2298/tsci210424286s.

Full text

Abstract:

A series of high-resolution simulations on film cooling with varying blowing ratios and inclination angles are carried out by using in-house code based on hybrid thermal lattice Boltzmann method. Three blowing ratios ranging from 0.2 to 0.8 and four inclination angles from 15? to 60? are chosen for the simulations. The evolutionary mechanism of coherent structure in three domains of film-covering region is studied from the view of space and time. Besides, the influencing mechanism of blowing ratio and inclination angle on flow and heat-transfer features of film cooling is uncovered. Results sh

APA, Harvard, Vancouver, ISO, and other styles

24

Lane, Jeremiah S., and Benjamin F. Akers. "Two-Dimensional Steady Boussinesq Convection: Existence, Computation and Scaling." Fluids 6, no. 12 (2021): 425. http://dx.doi.org/10.3390/fluids6120425.

Full text

Abstract:

This research investigates laser-induced convection through a stream function-vorticity formulation. Specifically, this paper considers a solution to the steady Boussinesq Navier–Stokes equations in two dimensions with a slip boundary condition on a finite box. A fixed-point algorithm is introduced in stream function-vorticity variables, followed by a proof of the existence of steady solutions for small laser amplitudes. From this analysis, an asymptotic relationship is demonstrated between the nondimensional fluid parameters and least upper bounds for laser amplitudes that guarantee existence

APA, Harvard, Vancouver, ISO, and other styles

25

Wolf, William R., João Luiz F. Azevedo, and Sanjiva K. Lele. "Convective effects and the role of quadrupole sources for aerofoil aeroacoustics." Journal of Fluid Mechanics 708 (August 10, 2012): 502–38. http://dx.doi.org/10.1017/jfm.2012.327.

Full text

Abstract:

AbstractThe present investigation of aerofoil self-noise generation and propagation concerns the effects of mean flow and quadrupole sources on the broadband noise that arises from the interaction of turbulent boundary layers with the aerofoil trailing edge and the tonal noise that arises from vortex shedding generated by laminar boundary layers and trailing-edge bluntness. Compressible large-eddy simulations (LES) are conducted for a NACA0012 aerofoil with rounded trailing edge for four flow configurations with different angles of incidence, boundary layer tripping configurations and free-str

APA, Harvard, Vancouver, ISO, and other styles

26

Mandal, A. C., and J. Dey. "An experimental study of boundary layer transition induced by a cylinder wake." Journal of Fluid Mechanics 684 (September 1, 2011): 60–84. http://dx.doi.org/10.1017/jfm.2011.270.

Full text

Abstract:

AbstractBoundary layer transition induced by the wake of a circular cylinder in the free stream has been investigated using the particle image velocimetry technique. Some differences between simulation and experimental studies have been reported in the literature, and these have motivated the present study. The appearance of spanwise vortices in the early stage is further confirmed here. A spanwise vortex appears to evolve into a $ \mrm{\Lambda} $/hairpin vortex; the flow statistics also confirm such vortices. With increasing Reynolds number, based on the cylinder diameter, and with decreasing

APA, Harvard, Vancouver, ISO, and other styles

27

T.Lakshmana, Kishore *1 D.Rajesh 2. "HEAT TRANSFER ENHANCEMENT IN RECTANGULAR CHANNEL USING RECTANGLE WINGLET VORTEX GENERATOR." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, no. 2 (2018): 333–40. https://doi.org/10.5281/zenodo.1173502.

Full text

Abstract:

<strong>ABSTRACT</strong> There are many applications in engineering industry that require heat addition or removal and a wide variety of heat exchange devices are used for different applications. Performance of improving coefficient of heat transfer becomes essential in all applications. Most of thermal devices like high temperature gas turbines, heat exchangers, electronic equipment, convective heat transfer plays a major role in most of the engineering applications. To attain higher coefficient of heat transfer, it is necessary that the surface of heat transfer flow is to be made turbulent.

APA, Harvard, Vancouver, ISO, and other styles

28

Majdi, Hasan Shakir, Mahmoud A. Mashkour, Laith Jaafer Habeeb, and Marko Ilic. "Mixed convection around a circular cylinder in a buoyancy-assisting flow." Curved and Layered Structures 9, no. 1 (2022): 81–95. http://dx.doi.org/10.1515/cls-2022-0008.

Full text

Abstract:

Abstract In this paper, the effect of mixed convection on the flow behavior and heat transfer around a circular cylinder disclosed to a vertically upward laminar air stream is numerically examine. The buoyancy-aided flow is utilized to eliminate and control the vortex shedding of the cylinder. The influence of the Grashof number, 0 ≤ Gr ≤ 6000, the flow and thermal patterns, as well as the local and mean Nusselt number, is investigated at a constant Reynolds number of 100. The unsteady Navier-Stokes’s equations are solved employing a finite-volume method to simulate numerically the velocity an

APA, Harvard, Vancouver, ISO, and other styles

29

Rani, H. P., V. Narayana, and Y. Rameshwar. "Analysis Of Field Synergy In Bottom Heated Lid Driven Cubical Cavity." E3S Web of Conferences 128 (2019): 07007. http://dx.doi.org/10.1051/e3sconf/201912807007.

Full text

Abstract:

This study presents an innovative visualization tool for the analysis of the mixed convection in a lid-driven air filled cubical cavity heated from below. The total energy of the flow in the cavity isvisualized based on the energy stream functions or energy streamlines. Also the heat transfer enhancement in the cavity is presented with an analogy between conduction and convection, namely, the field synergy principle. Flow is assumed to be driven by the vertical temperature gradient and by the top lid of the cavity, which is assumed to slide on its own plane at a uniform speed. The top and bott

APA, Harvard, Vancouver, ISO, and other styles

30

Fořt, Ivan, Miloslav Hošťálek, Hans Dietrich Laufhütte, and Alfons Bertram Mersmann. "Description of the flow of mechanically agitated liquid in a system with cylindrical draft-tube and radial baffles." Collection of Czechoslovak Chemical Communications 52, no. 6 (1987): 1416–29. http://dx.doi.org/10.1135/cccc19871416.

Full text

Abstract:

A model is described of two-dimensional vortex turbulent flow of homogeneous liquid in a cylindrical tank with flat bottom and radial baffles at its walls agitated with an inclined plane blade impeller rotating in a cylindrical draft-tube. The obtained field of the mean Stokes stream function expresses the streamline distribution in the system. As the boundary conditions of the used solution of stream equation serve partly the values of the mean Stokes stream function on the system boundaries (bottom, liquid level, walls of tank and draft-tube, tank axis), partly the radial profiles of axial a

APA, Harvard, Vancouver, ISO, and other styles

31

Sun, Meng, Jieyu Jiang, Yongzhe Yu, Canxing He, Kun Liu, and Bin Zhang. "The impinging wall effect on flame dynamics and heat transfer in non-premixed jet flames." Thermal Science, no. 00 (2022): 76. http://dx.doi.org/10.2298/tsci220126076s.

Full text

Abstract:

The impinging jet flame is studied experimentally and numerically accounting for the complex flame-wall interactions in practical combustion devices. Flame dynamics and heat transfer with the effect of impinging wall are analyzed. 3D large eddy simulation coupled with detailed chemical reaction mechanism and particle image velocimetry experiment based on cross-correlation measurement principle are performed for verification and further analysis. Results show that vortices are generated due to the Kelvin-Helmholtz instability originated from velocity gradient. 3D vortex interactions involving v

APA, Harvard, Vancouver, ISO, and other styles

32

KURDYUMOV, VADIM N., and AMABLE LIÑÁN. "Free and forced convection around line sources of heat and heated cylinders in porous media." Journal of Fluid Mechanics 427 (January 25, 2001): 389–409. http://dx.doi.org/10.1017/s0022112000002482.

Full text

Abstract:

An analysis is presented for the steady, two-dimensional, free convection around line sources of heat and heated cylinders in unbounded saturated porous media. It is extended to account also for the effects of forced convection. The study is based on the Boussinesq equations, with the velocities calculated using Darcy's law.The analysis begins with the non-dimensional formulation and numerical solution of the problem of pure free convection around a line source of heat. When this analysis is extended to include the effects of forced convection, two parameters appear in the non-dimensional form

APA, Harvard, Vancouver, ISO, and other styles

33

Roy, NC, P. Akther, and AK Halder. "MHD Mixed Convection Flow of a Micropolar Fluid Past a Wedge Fixed in a Fluctuating Free Stream and Surface Temperature." Dhaka University Journal of Science 64, no. 1 (2016): 65–70. http://dx.doi.org/10.3329/dujs.v64i1.28526.

Full text

Abstract:

The flow an heat transfer on the unstea y laminar mixe convection boun ary layer in a micropolar flui past a vertical we ge have been stu ie taking into account the effect of magnetic fiel . We assume that the free stream velocity an surface temperature oscillate in magnitu e but not in the irection of the oncoming flow velocity. The governing equations have been solve numerically by using the straight forwar finite ifference metho . The amplitu es of skin friction an couple stress are foun to be significantly epen ent on the Richar sons number, Ri, the magnetic parameter, M, an the vortex vi

APA, Harvard, Vancouver, ISO, and other styles

34

Metz, Nicholas D., and Lance F. Bosart. "Derecho and MCS Development, Evolution, and Multiscale Interactions during 3–5 July 2003." Monthly Weather Review 138, no. 8 (2010): 3048–70. http://dx.doi.org/10.1175/2010mwr3218.1.

Full text

Abstract:

Abstract From 3 to 5 July 2003 during the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX), multiple mesoscale convective systems (MCSs 1 and 2) and derechos (derechos AN, AS, A, BW, and BE) progressed across a preferred upper Midwest corridor. The derechos evolved in a favorable synoptic-scale environment. However, the environmental details associated with each derecho, such as the characteristics of the initial surface boundary, the formation position relative to the upper-level jet stream, the presence of an upper-level mesoscale disturbance, and the CAPE/shear environment varied

APA, Harvard, Vancouver, ISO, and other styles

35

Heidarzadeh, Habibollah, Mousa Farhadi, and Kurosh Sedighi. "Convective heat transfer over a wall mounted cube at different angle of attack using large eddy simulation." Thermal Science 18, suppl.2 (2014): 301–15. http://dx.doi.org/10.2298/tsci110614088h.

Full text

Abstract:

Turbulent fluid flow and convective heat transfer over the wall mounted cube in different flow angle of attack have been studied numerically using Large Eddy Simulation. Cube faces and plate have a constant heat flux. Dynamic Smagorinsky (DS) subgrid scale model were used in this study. Angles were in the range 0???45 and Reynolds number based on the cube height and free stream velocity was 4200. The numerical simulation results were compared with the experimental data of Nakamura et al [6, 7]. Characteristics of fluid flow field and heat transfer compared for four angles of attack. Flow aroun

APA, Harvard, Vancouver, ISO, and other styles

36

Hall, Philip. "Vortex–wave interactions: long-wavelength streaks and spatial localization in natural convection." Journal of Fluid Mechanics 703 (June 12, 2012): 99–110. http://dx.doi.org/10.1017/jfm.2012.196.

Full text

Abstract:

AbstractThe unidirectional shear flow driven by buoyancy effects in a vertical channel when a temperature difference is maintained between the walls of the channel is considered. The flow is unstable to waves which interact to reinforce the original flow and make it ‘streaky’. Such ‘vortex–wave’ interactions have been the subject of much recent research but little is yet known about what happens when the wavelength of the roll/streak flow becomes large. An asymptotic structure for long-wavelength interactions is derived and the tendency of the fluid to resist this state and the flow to become

APA, Harvard, Vancouver, ISO, and other styles

37

Roy, N. C., and R. S. R. Gorla. "Unsteady MHD Mixed Convection Flow of a Micropolar Fluid Over a Vertical Wedge." International Journal of Applied Mechanics and Engineering 22, no. 2 (2017): 363–91. http://dx.doi.org/10.1515/ijame-2017-0022.

Full text

Abstract:

AbstractAn analysis is presented to investigate the unsteady magnetohydrodynamic (MHD) mixed convection boundary-layer flow of a micropolar fluid over a vertical wedge in the presence of thermal radiation and heat generation or absorption. The free-stream velocity and surface temperature are assumed to be oscillating in magnitude but not in the direction of the oncoming flow velocity. The governing equations have been solved by two distinct methods, namely, the finite difference method for the entire frequency range, and the series solution for low frequency range and the asymptotic series exp

APA, Harvard, Vancouver, ISO, and other styles

38

Mathelin, Lionel, Franc¸oise Bataille, and Andre´ Lallemand. "The Effect of Uniform Blowing on the Flow Past a Circular Cylinder." Journal of Fluids Engineering 124, no. 2 (2002): 452–64. http://dx.doi.org/10.1115/1.1467919.

Full text

Abstract:

This work describes blowing through the whole surface of a porous circular cylinder for the control of the near wake dynamics and the thermal protection of the surface. The flow past the cylinder is numerically studied and the blowing is modeled. Comparisons with experimental data are used for validation. It is shown that the blowing tends to increase the boundary layer thickness, to promote its separation and to decrease the viscous drag induced. Similarly, the convective heat transfer is lowered, and in the case of a nonisothermal blowing, the surface is very effectively protected from the h

APA, Harvard, Vancouver, ISO, and other styles

39

Natarajan, V., and M. K. Chyu. "Effect of Flow Angle-of-Attack on the Local Heat/Mass Transfer From a Wall-Mounted Cube." Journal of Heat Transfer 116, no. 3 (1994): 552–60. http://dx.doi.org/10.1115/1.2910906.

Full text

Abstract:

An experimental study of the local mass transfer over the entire surface of a wall-mounted cube is performed with a particular emphasis on the effects of flow angles-of-attack (0 deg ≤ α ≤ 45 deg). Invoking an analogy between heat transfer and mass transfer, the presently obtained mass transfer results can be transformed into their heat transfer counterparts. Reynolds number based on the cube height and mean free-stream velocity varies between 3.1 × 104 and 1.1 × 105. To substantiate the mass transfer results, streakline patterns are visualized on the cube surfaces as well as the endwall using

APA, Harvard, Vancouver, ISO, and other styles

40

Diez, F. J., L. P. Bernal, and G. M. Faeth. "Self-Preserving Mixing Properties of Steady Round Nonbuoyant Turbulent Jets in Uniform Crossflows." Journal of Heat Transfer 127, no. 8 (2005): 877–87. http://dx.doi.org/10.1115/1.1991868.

Full text

Abstract:

The self-preserving mixing properties of steady round nonbuoyant turbulent jets in uniform crossflows were investigated experimentally. The experiments involved steady round nonbuoyant fresh water jet sources injected into uniform and steady fresh water crossflows within the windowed test section of a water channel facility. Mean and fluctuating concentrations of source fluid were measured over cross sections of the flow using planar-laser-induced-fluorescence (PLIF). The self-preserving penetration properties of the flow were correlated successfully similar to Diez et al. [ASME J. Heat Transf

APA, Harvard, Vancouver, ISO, and other styles

41

Yilmaz, T. O., and D. Rockwell. "Flow structure on finite-span wings due to pitch-up motion." Journal of Fluid Mechanics 691 (December 5, 2011): 518–45. http://dx.doi.org/10.1017/jfm.2011.490.

Full text

Abstract:

AbstractThe flow structure on low-aspect-ratio wings arising from pitch-up motion is addressed via a technique of particle image velocimetry. The objectives are to: determine the onset and evolution of the three-dimensional leading-edge vortex; provide complementary interpretations of the vortex structure in terms of streamlines, projections of spanwise and surface-normal vorticity, and surfaces of constant values of the second invariant of the velocity gradient tensor (iso-$Q$ surfaces); and to characterize the effect of wing planform (rectangular versus elliptical) on this vortex structure.

APA, Harvard, Vancouver, ISO, and other styles

42

Lin, W. L., and T. F. Lin. "Observation and Computation of Vortex and/or Reverse Flow Development in Mixed Convection of Air in a Slightly Inclined Rectangular Duct." Journal of Heat Transfer 119, no. 4 (1997): 691–99. http://dx.doi.org/10.1115/1.2824173.

Full text

Abstract:

Combined flow visualization and conjugated numerical heat transfer analysis were carried out to study the axial evolution of the buoyancy induced secondary vortex and reverse flow in a mixed convective air flow through a bottom heated, slightly inclined rectangular duct. Results were obtained for the Grashof number Gr ranging from 1.6 × 103 to 2.8 × 105, inclined angle φ from −20 deg to 26 deg and the Reynolds number Re below 102 covering the steady and time dependent flows. For the buoyancy-opposing case, at a certain critical buoyancy-to-inertia ratio depending on the Re and φ both the exper

APA, Harvard, Vancouver, ISO, and other styles

43

Chen, C. C., A. Labhabi, H. C. Chang, and R. E. Kelly. "Spanwise pairing of finite-amplitude longitudinal vortex rolls in inclined free-convection boundary layers." Journal of Fluid Mechanics 231 (October 1991): 73–111. http://dx.doi.org/10.1017/s0022112091003324.

Full text

Abstract:

Buoyancy-driven flow on a heated inclined plate can become unstable to static longitudinal roil instability at a critical distance, measured by $\tilde{R}_{\rm c}$, from the leading edge. Experiments in water by Sparrow & Husar (1969) indicate that these rolls undergo a second transition further downstream such that adjacent rolls merge and their spanwise wavelength is doubled. We study this secondary bifurcation phenomenon here with a set of model equations by first constructing the full eigenspectrum and eigenfunctions with a Chebyshev–Tau spectral method and then deriving the pertinent

APA, Harvard, Vancouver, ISO, and other styles

44

Goldstein, R. J., and R. A. Spores. "Turbulent Transport on the Endwall in the Region Between Adjacent Turbine Blades." Journal of Heat Transfer 110, no. 4a (1988): 862–69. http://dx.doi.org/10.1115/1.3250586.

Full text

Abstract:

The complex three-dimensional flow in the endwall region near the base of a turbine blade has an important impact on the local heat transfer. The initial horseshoe vortex, the passage vortex, and resulting corner vortices cause large variations in heat transfer over the entire endwall region. Due to these large surface gradients in heat transfer, conventional measurement techniques generally do not provide an accurate determination of the local heat transfer coefficients. In the present study, the heat/mass transfer analogy is used to examine the local transport coefficients for two different

APA, Harvard, Vancouver, ISO, and other styles

45

Isaev, Sergey, Vladimir Seroshtanov, Vladimir Mityakov, and Sergey Sapozhnikov. "Gradient heatmetry and PIV combination in the study of flow in an oval-trench dimple." E3S Web of Conferences 459 (2023): 03007. http://dx.doi.org/10.1051/e3sconf/202345903007.

Full text

Abstract:

An experimental convective heat transfer study is carried out to explore if the local heat transfer coefficient into an oval-trench dimple can outnumber to the well-known heat transfer on the smooth surface. Bismuth-based gradient heat flux sensors were used on a single oval-trench dimple mounted the surface. The experiments were performed in a wind tunnel in the Reynolds number range from 5·103 to 3·104. The option is considered when the angle of inclination the dimple’ longitudinal axis to the free-stream velocity vector is 45°, and the relative depth is 0.25. Under experimental conditions,

APA, Harvard, Vancouver, ISO, and other styles

46

Poonia, Minakshi. "Computational study on MHD power-law fluid in tilted enclosure having sinusoidal heated sidewall." Multidiscipline Modeling in Materials and Structures 16, no. 5 (2020): 1041–59. http://dx.doi.org/10.1108/mmms-08-2019-0154.

Full text

Abstract:

PurposeIn the present computational study, the heat transfer and two-dimensional natural convection flow of non-Newtonian power-law fluid in a tilted rectangular enclosure is examined. The left wall of enclosure is subjected to spatially varying sinusoidal temperature distribution and right wall is cooled isothermally while the upper and lower walls are retained to be adiabatic. The flow is considered to be laminar, steady and incompressible under the influence of magnetic field. The governing mass, momentum and energy equations are transformed into dimensionless form in terms of stream functi

APA, Harvard, Vancouver, ISO, and other styles

47

KUMAR, BHASKAR, JACOB JOHN KOTTARAM, AMIT KUMAR SINGH, and SANJAY MITTAL. "Global stability of flow past a cylinder with centreline symmetry." Journal of Fluid Mechanics 632 (July 27, 2009): 273–300. http://dx.doi.org/10.1017/s0022112009007241.

Full text

Abstract:

Global absolute and convective stability analysis of flow past a circular cylinder with symmetry conditions imposed along the centreline of the flow field is carried out. A stabilized finite element formulation is used to solve the eigenvalue problem resulting from the linearized perturbation equation. All the computations carried out are in two dimensions. It is found that, compared to the unrestricted flow, the symmetry conditions lead to a significant delay in the onset of absolute as well as convective instability. In addition, the onset of absolute instability is greatly affected by the l

APA, Harvard, Vancouver, ISO, and other styles

48

Coelho, Sergio L. V., and J. C. R. Hunt. "The dynamics of the near field of strong jets in crossflows." Journal of Fluid Mechanics 200 (March 1989): 95–120. http://dx.doi.org/10.1017/s0022112089000583.

Full text

Abstract:

An inviscid three-dimensional vortex-sheet model for the near field of a strong jet issuing from a pipe into a crossflow is derived. The solution for this model shows that the essential mechanisms governing this idealized flow are the distortion of the main transverse vorticity by the generation of additional axial and transverse vorticity within the pipe owing to the pressure gradients induced by the external flow, and the convection of both components of vorticity from the upwind side of the jet to its downwind side.The deformation of the cross-section of the jet which is predicted by this m

APA, Harvard, Vancouver, ISO, and other styles

49

Zülicke, Christoph, and Dieter Peters. "Simulation of Inertia–Gravity Waves in a Poleward-Breaking Rossby Wave." Journal of the Atmospheric Sciences 63, no. 12 (2006): 3253–76. http://dx.doi.org/10.1175/jas3805.1.

Full text

Abstract:

Poleward-breaking Rossby waves often induce an upper-level jet streak over northern Europe. Dominant inertia–gravity wave packets are observed downstream of this jet. The physical processes of their generation and propagation, in such a configuration, are investigated with a mesoscale model. The study is focused on an observational campaign from 17 to 19 December 1999 over northern Germany. Different simulations with the fifth-generation Pennsylvania State University–National Center for Atmospheric Research (PSU–NCAR) Mesoscale Model (MM5) have been performed. For a high-resolution process stu

APA, Harvard, Vancouver, ISO, and other styles

50

Ur Rehman, Asif, Muhammad Arif Mahmood, Fatih Pitir, Metin Uymaz Salamci, Andrei C. Popescu, and Ion N. Mihailescu. "Mesoscopic Computational Fluid Dynamics Modelling for the Laser-Melting Deposition of AISI 304 Stainless Steel Single Tracks with Experimental Correlation: A Novel Study." Metals 11, no. 10 (2021): 1569. http://dx.doi.org/10.3390/met11101569.

Full text

Abstract:

For laser-melting deposition (LMD), a computational fluid dynamics (CFD) model was developed using the volume of fluid and discrete element modeling techniques. A method was developed to track the flow behavior, flow pattern, and driving forces of liquid flow. The developed model was compared with experimental results in the case of AISI 304 stainless steel single-track depositions on AISI 304 stainless steel substrate. A close correlation was found between experiments and modeling, with a deviation of 1–3%. It was found that the LMD involves the simultaneous addition of powder particles that

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!