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Journal articles on the topic 'Two-dimensional enclosure'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

STALIULIONIS, Žygimantas, Gintautas MILIAUSKAS, Sankhya MOHANTY, and Jesper Henri HATTEL. "Numerical Modelling of Moisture Transport Between Two Enclosures Connected by a Tube." Mechanics 28, no. 5 (2022): 369–77. http://dx.doi.org/10.5755/j02.mech.32166.

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The electronics is protected using plastic or metallic enclosures. Although, the electronics is protected by the enclosures from the surrounding environment, the moisture can still enter the enclosure via gasket, plastic enclosure walls, cable feedthroughs. The moisture existing inside enclosure may condense on PCBA or components due to a temperature changes or different temperature levels and can lead to a moisture-related failures. The temperature in the enclosure is also very dependent on the location and the heating of electronic components. Furthermore, the electronics can be mounted near

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2

Daun, K. J., D. P. Morton, and J. R. Howell. "Geometric Optimization of Radiant Enclosures Containing Specular Surfaces." Journal of Heat Transfer 125, no. 5 (2003): 845–51. http://dx.doi.org/10.1115/1.1599369.

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This paper presents an optimization methodology for designing radiant enclosures containing specularly-reflecting surfaces. The optimization process works by making intelligent perturbations to the enclosure geometry at each design iteration using specialized numerical algorithms. This procedure requires far less time than the forward “trial-and-error” design methodology, and the final solution is near optimal. The radiant enclosure is analyzed using a Monte Carlo technique based on exchange factors, and the design is optimized using the Kiefer-Wolfowitz method. The optimization design methodo

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3

Chen, K. S., J. R. Ho, and J. A. C. Humphrey. "Steady, Two-Dimensional, Natural Convection in Rectangular Enclosures With Differently Heated Walls." Journal of Heat Transfer 109, no. 2 (1987): 400–406. http://dx.doi.org/10.1115/1.3248094.

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Numerical results are presented for steady natural convection in two-dimensional rectangular enclosures in which the side walls, top wall, and bottom wall are at uniform temperatures θs, θt, and θb, respectively, and θs > θt > θb. Raylight numbers ranging from 104 to 107 and aspect ratios of 1 and 1.5 were investigated. The top wall was modeled as an impermeable rigid surface or an impermeable free-moving boundary. The calculations reveal two flow regions. In the upper part of the enclosure two large counterrotating cells appear, separated by a descending plume of fluid. Near the bottom

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4

Mei, Chuan Zhi, Lin Hua Piao, Quan Gang Yu, Bao Li Zhang, Xia Ding, and Xing Wang. "Study on the Pendulum Characteristic of Nature Convection in Dimensional Enclosure." Advanced Materials Research 542-543 (June 2012): 1120–23. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.1120.

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In this paper, the pendulum characteristic of nature convection gas in dimensional enclosure is analyzed by FEM. Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving. The results are as follow: (1)Under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteri

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5

Yu, Quan Gang, Lin Hua Piao, and Xing Wang. "FEM Analysis of the Pendulum Characteristic of Nature Convection in Dimensional Enclosure." Advanced Materials Research 505 (April 2012): 195–98. http://dx.doi.org/10.4028/www.scientific.net/amr.505.195.

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In this paper, the pendulum characteristic of nature convection gas in dimensional enclosure is analyzed by FEM. Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving. The results are as follow: (1)Under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteri

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6

George, Ballard W. "Compressor noise control with a two‐dimensional enclosure." Journal of the Acoustical Society of America 114, no. 4 (2003): 2355. http://dx.doi.org/10.1121/1.4781165.

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7

Hamed Mahmoud, Mohammed, and Ali Jaber Alkhakani. "Effect of Adding Horizontal Rings on the Thermal Behavior of Cylindrical Liquid Enclosure Exposed to High Heat Flux." University of Thi-Qar Journal for Engineering Sciences 6, no. 2 (2015): 34–52. http://dx.doi.org/10.31663/utjes.v6i2.77.

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Power generation by using concentrated solar thermal energy on liquid enclosures is one of the most promising renewable energy technologies. In this work, a developed liquid enclosure fitted with various number and configurations of horizontal metal rings have been analyzed, fabricated and tested. The influence of adding metal rings arrangement is investigated for its potential to enhance radial heat conduction to the center-line of the enclosure from the side-walls. Experiments were carried out for fluid in both static and dynamic modes of operation inside the enclosure that subjected to high

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8

Aktas, M. K., and T. Ozgumus. "A numerical investigation of the effects of a transverse temperature gradient on the formation of regular and irregular acoustic streaming in an enclosure." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 1 (2010): 132–44. http://dx.doi.org/10.1243/09544062jmes1834.

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The effects of a transverse temperature gradient on the formation of regular and irregular acoustic streaming structures in air-filled, two-dimensional, rectangular, shallow enclosures carrying a longitudinal sound field are investigated numerically. The fluid motion is induced by the harmonic vibration of the enclosure left wall. The fully compressible form of the Navier—Stokes equations is considered to predict the primary oscillatory and secondary pseudo-steady streaming flow fields. An explicit time-marching flux-corrected transport algorithm is used to simulate the acoustic wave formation

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9

Ahmadi, Mehdi. "NATURAL CONVECTIVE HEAT TRANSFER IN A POROUS MEDIUM WITHIN A TWO DIMENSIONAL ENCLOSURE." IIUM Engineering Journal 18, no. 2 (2017): 196–211. http://dx.doi.org/10.31436/iiumej.v18i2.593.

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In this paper, to achievement the effect of increase number of heating components arrangement on the rate of heat transfer of natural convection, that others have been less noticed. Therefore, in each stage increase the number of heating components so much the space occupied by them remains constant. Then by calculating the amount of heat transfer in different Rayleigh number became clear that minify and distributing heating solid phase in the enclosure increases the total Nusselt number and heat transfer, One reason could be high intensity of fluid motion in corners and near walls of the encl

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10

SEZAI, I., and A. A. MOHAMAD. "Three-dimensional double-diffusive convection in a porous cubic enclosure due to opposing gradients of temperature and concentration." Journal of Fluid Mechanics 400 (December 10, 1999): 333–53. http://dx.doi.org/10.1017/s0022112099006540.

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A three-dimensional mathematical model based on the Brinkman extended Darcy equation has been used to study double-diffusive natural convection in a fluid-saturated porous cubic enclosure subject to opposing and horizontal gradients of temperature and concentration. The flow is driven by conditions of constant temperature and concentration imposed along the two vertical sidewalls of the cubic enclosure, while the remaining walls are impermeable and adiabatic. The numerical simulations presented here span a wide range of porous thermal Rayleigh number, buoyancy ratio and Lewis number to identif

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11

Ji, Ming Ming, Lin Hua Piao, and Bai Hua Li. "Three-Dimensional FEM Analysis of the Gas Pendulum Characteristic for Airflow Level Posture Sensor." Advanced Materials Research 271-273 (July 2011): 216–19. http://dx.doi.org/10.4028/www.scientific.net/amr.271-273.216.

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Using ANSYS-FLOTRAN CFD program, the finite element simulation is conducted by a series of procedures, such as three-dimensional model building of airflow inclination sensor, network modifying, loads applying and equation solving. The flow field in three-dimensional hermetic chamber of sensitive element of airflow level posture sensor is calculated, FEM analysis has been obtained. The numerical results show that under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characte

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12

Ilegbusi, O. J., and M. D. Mat. "A Two-Fluid Model of Mixing in a Two-Dimensional Enclosure." Journal of Heat Transfer 120, no. 1 (1998): 115–26. http://dx.doi.org/10.1115/1.2830034.

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Mixing of fluids in a cavity under isothermal and nonisothermal conditions is studied with a two-fluid model. This model involves the solution of separate transport equations for zone-averaged variables of each fluid with allowance for interface transport of momentum and energy. The effects of thermal and potential energy driven convection as well as Prandtl number are investigated. The material interface is represented by the contour of the volume fraction separating the fluids. The effect of the buoyancy force due to the initial potential energy of the fluids is found to predominate over the

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13

Hasan, Nadeem, and Sanjeev Sanghi. "On the Role of Coriolis Force in a Two-Dimensional Thermally Driven Flow in a Rotating Enclosure." Journal of Heat Transfer 129, no. 2 (2006): 179–87. http://dx.doi.org/10.1115/1.2402176.

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In this work the role of Coriolis forces in the evolution of a two-dimensional thermally driven flow in a rotating enclosure of arbitrary geometry is discussed. Contrary to the claims made in some of the studies involving such class of flows that there is an active involvement of the these forces in the dynamics of the flow, it is shown that the Coriolis force does not play any role in the evolution of the velocity and temperature fields. This is theoretically demonstrated by recognizing the irrotational character of the Coriolis force in such class of flows. It is further shown that the prese

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14

Sefcik, D. M., B. W. Webb, and H. S. Heaton. "Natural Convection in Vertically Vented Enclosures." Journal of Heat Transfer 113, no. 4 (1991): 912–18. http://dx.doi.org/10.1115/1.2911221.

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Steady, laminar natural convection in vertically vented two-dimensional enclosures has been investigated both experimentally and analytically. A vertically vented enclosure is one in which the buoyancy-driven flow and heat transfer are restricted by vents in the top and bottom bounding walls of the enclosure. The local heat transfer along the heated wall was determined using Mach-Zehnder interferometry, and the flow structure was determined using a smoke generation flow visualization technique. Analytically, the governing conservation equations were solved numerically using a control volume-ba

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15

Natesan, Saritha, and Senthil Kumar Arumugam. "Analysis of double diffusion natural convection in an enclosure filled with alumina water nanofluid using Buongioro's two phase model." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 10 (2019): 3707–29. http://dx.doi.org/10.1108/hff-07-2018-0416.

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Purpose The purpose of this study is to apply Buongiorno’s two phase model to analyse double diffusion natural convection in a square enclosure filled with nanofluids. Design/methodology/approach A computational code based on the SIMPLE algorithm and finite volume method is used to solve the non-dimensional governing equations. Findings The nanoparticle plays a crucial role when thermal and solutal buoyancy forces are equal and opposing. Originality/value This is the first paper to apply Buongiorno’s two phase model for double diffusion natural convection in enclosures filled with nanofluids.

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16

Chang, Byong-Hoon. "Numerical study of flow and heat transfer in differentially heated enclosures." Thermal Science 18, no. 2 (2014): 451–63. http://dx.doi.org/10.2298/tsci110626007c.

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Two-dimensional laminar natural convection is studied numerically for differentially heated air-filled rectangular enclosures with adiabatic side walls and aspect ratios of 1, 2, 4 and 8. The inclination angle of the enclosure was varied from 0? to 180?, and the effect of inclination on flow field and heat transfer was investigated over the range 103 ? Ra ? 106. Correlations of average Nusselt number based on the present results are presented for horizontal and vertical cases. Large discrepancies were found among published results.

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17

Desrayaud, G., and G. Lauriat. "A Numerical Study of Natural Convection in Partially Open Enclosures With a Conducting Side-Wall." Journal of Heat Transfer 126, no. 1 (2004): 76–83. http://dx.doi.org/10.1115/1.1643753.

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A numerical study of natural convection generated by a cold vertical wall of an enclosure with two openings on the opposite wall of finite thickness is presented. The enclosure is connected to an infinite reservoir filled with hot air. A two-dimensional laminar flow is assumed both within the enclosure and along the side of the bounding wall immersed into the reservoir. The effects of the size of the openings, spacing between the vertical walls and thermal resistance of the bounding wall are investigated. Numerical results are discussed for aspect ratios of the enclosure and Rayleigh numbers r

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18

Samimi Behbahan, Amin, Aminreza Noghrehabadi, C. P. Wong, Ioan Pop, and Morteza Behbahani-Nejad. "Investigation of enclosure aspect ratio effects on melting heat transfer characteristics of metal foam/phase change material composites." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 9 (2019): 2994–3011. http://dx.doi.org/10.1108/hff-11-2018-0659.

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Purpose The purpose of this paper is to study thermal performance of metal foam/phase change materials composite under the influence of the enclosure aspect ratios (ratio of enclosure height: length). In this study, a compound metal foam/phase change material (PCM), which has been proved to be one of the most promising approaches for thermal conductivity promotion on PCMs, was used. Design/methodology/approach The PCM is considered initially at its melting temperature. The enclosure for all the cases has a constant volume with various aspect ratios. The left side of the enclosure is suddenly e

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19

Karki, K. C., P. S. Sathyamurthy, and S. V. Patankar. "Natural Convection in a Partitioned Cubic Enclosure." Journal of Heat Transfer 114, no. 2 (1992): 410–17. http://dx.doi.org/10.1115/1.2911289.

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Numerical solutions are obtained for fluid flow and heat transfer in a cubic enclosure with a vertical adiabatic partition. The two zones of the enclosure are connected by a single rectangular opening. The partition is oriented parallel to the isothermal sidewalls, one of which is heated and the other cooled while the remaining walls are adiabatic. Results have been presented for air for the Rayleigh numbers in the range 104−107. The width of the opening is held fixed while the height, relative to the enclosure height, is varied from 0.25 to 0.75. The effects of various parameters on the flow

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20

Keshtkar, M. M., and M. Ghazanfari. "Numerical Investigation of Fluid Flow and Heat Transfer Inside a 2D Enclosure with Three Hot Obstacles on the Ramp under the Influence of a Magnetic Field." Engineering, Technology & Applied Science Research 7, no. 3 (2017): 1647–57. https://doi.org/10.5281/zenodo.809251.

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This paper focuses on solving the fluid flow and heat transfer equations inside a two-dimensional square enclosure containing three hot obstacles affected by gravity and magnetic force placed on a ramp using Boltzmann method (LBM) applying multiple relaxation times (MRT). Although, the Lattice Boltzmann with MRT is a complex technique, it is a relatively new, stable, fast and high-accurate one. The main objective of this research was to numerically model the fluid flow and ultimately obtaining the velocity field, flow and temperature contour lines inside a two-dimensional enclosure. The result

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Mustafa, Ahmad W., and Mustafa Z. Abood. "Natural Convection from Discrete Heat Sources Placed in Wavy Enclosure." Tikrit Journal of Engineering Sciences 23, no. 4 (2016): 36–51. http://dx.doi.org/10.25130/tjes.23.4.05.

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The effect of sinusoidal corrugated upper surface for enclosure on the heat transfer by natural convection from two heat sources placed on the bottom surface of the enclosure has been studied. The two heat sources constant and high temperature, length of each heat source (10%) from the total length of bottom surface, the distances that do not contain heat source on the bottom surface thermally insulated, temperature of verticals walls and upper surface low and constant. corrugating upper surface was change the dimensional corrugation amplitude between (0.1-0.3), for number of corrugations (3),

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22

Ho, C. H., and M. N. Özişik. "COMBINED CONDUCTION AND RADIATION IN A TWO-DIMENSIONAL RECTANGULAR ENCLOSURE." Numerical Heat Transfer 13, no. 2 (1988): 229–39. http://dx.doi.org/10.1080/10407788808913613.

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23

Ho, C. H., and M. N. Ozisik. "Combined Conduction and Radiation in a two-Dimensional Rectangular Enclosure." Numerical Heat Transfer, Part B: Fundamentals 13, no. 2 (1988): 229–39. http://dx.doi.org/10.1080/10407798808551382.

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24

Zhang, Yichao, Ying Wang, and Jinghai Zhou. "Research on two-dimensional heat transfer characteristic of enclosure structure." IOP Conference Series: Earth and Environmental Science 252 (July 9, 2019): 032211. http://dx.doi.org/10.1088/1755-1315/252/3/032211.

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25

Webb, B. W., and T. L. Bergman. "Three-Dimensional Natural Convection From Vertical Heated Plates With Adjoining Cool Surfaces." Journal of Heat Transfer 114, no. 1 (1992): 115–20. http://dx.doi.org/10.1115/1.2911235.

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Natural convection in an enclosure with a uniform heat flux on two vertical surfaces and constant temperature at the adjoining walls has been investigated both experimentally and theoretically. The thermal boundary conditions and enclosure geometry render the buoyancy-induced flow and heat transfer inherently three dimensional. The experimental measurements include temperature distributions of the isoflux walls obtained using an infrared thermal imaging technique, while the three-dimensional equations governing conservation of mass, momentum, and energy were solved using a control volume-based

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Song, Kewei, Toshio Tagawa, Liang-bi Wang, and Hiroyuki Ozoe. "Numerical Investigation for the Modeling of the Magnetic Buoyancy Force during the Natural Convection of Air in a Square Enclosure." Advances in Mechanical Engineering 6 (January 1, 2014): 873260. http://dx.doi.org/10.1155/2014/873260.

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Numerical computations are carried out for natural convection of air in a two-dimensional square enclosure under a nonuniform magnetic field and together with the gravity field. The nonuniform magnetic field is supplied by a cubic permanent magnet placed above the enclosure. Two kinds of the expressions for the magnetizing force are considered and compared in the numerical computations. The flow and temperature fields, the magnetizing force field and the Nusselt number for two kinds of magnetizing force expressions are all presented in this paper. The numerical results reveal that the natural

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27

Hussain, Salam. "Studying the Internal Heat Transfer By Natural Convection Through an Inclined and a Modified Square Enclosure with a Triangular Top Wall." Kufa Journal of Engineering 1, no. 1 (2021): 78–99. http://dx.doi.org/10.30572/2018/kje/11293.

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A numerical analysis used to simulate laminar natural convective heat transfer in a two-dimensional inclined and a modified square enclosure having a triangular top wall has been performed. The model is applied to analyze natural convection in this enclosure where the left side wall is subjected to a constant heat flux while the other opposite wall is kept at isothermal cold temperature. The other enclosure walls are considered adiabatic. The enclosure under study is filled with air with Prandtl number is taken as 0.71. The two-dimensional flow is solved numerically by using the Finite Volume

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Asako, Y., H. Nakamura, Z. Chen, and M. Faghri. "Three-Dimensional Laminar Natural Convection in an Inclined Air Slot With Hexagonal Honeycomb Core." Journal of Heat Transfer 113, no. 4 (1991): 906–11. http://dx.doi.org/10.1115/1.2911220.

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Numerical solutions are obtained for a three-dimensional natural convection heat transfer problem in an inclined air slot with a hexagonal honeycomb core. The air slot is assumed to be long and wide such that the velocity and temperature fields repeat themselves in successive enclosures. The numerical methodology is based on an algebraic coordinate transformation technique, which maps the complex cross section onto a rectangle, coupled with a calculation procedure for fully elliptic three-dimensional flows. The calculations are performed for Rayleigh numbers in the range of 103 to 105, inclina

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Lu, L. K. H., and M. Mitchell. "Gas Turbine Acoustic Enclosure Design by the Statistical Energy Analysis Method." Journal of Engineering for Gas Turbines and Power 117, no. 3 (1995): 554–56. http://dx.doi.org/10.1115/1.2814130.

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Acoustic enclosure design is a complex problem that involves the interaction of multiple components. Yet the present conventional approach uses a two-dimensional closed-form solution to evaluate transmission loss of acoustic wall. In this paper, Statistical Energy Analysis (SEA) was first studied for simple cases of radiation efficiency, transmission loss, and flanking path calculations. The effectiveness of the SEA method for complex systems was then demonstrated through a practical design application to gas turbine enclosure. It was found that SEA was a useful tool for gas turbine acoustic e

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30

Ganguli, A. A., A. B. Pandit, and J. B. Joshi. "CFD simulation of heat transfer in a two-dimensional vertical enclosure." Chemical Engineering Research and Design 87, no. 5 (2009): 711–27. http://dx.doi.org/10.1016/j.cherd.2008.11.005.

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31

Nicolette, V. F., K. T. Yang, and J. R. Lloyd. "Transient cooling by natural convection in a two-dimensional square enclosure." International Journal of Heat and Mass Transfer 28, no. 9 (1985): 1721–32. http://dx.doi.org/10.1016/0017-9310(85)90146-2.

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32

Ouertatani, Nasreddine, Nader Ben Cheikh, Brahim Ben Beya, and Taieb Lili. "Numerical simulation of two-dimensional Rayleigh–Bénard convection in an enclosure." Comptes Rendus Mécanique 336, no. 5 (2008): 464–70. http://dx.doi.org/10.1016/j.crme.2008.02.004.

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Beya, Brahim Ben, and Taieb Lili. "Oscillatory double-diffusive mixed convection in a two-dimensional ventilated enclosure." International Journal of Heat and Mass Transfer 50, no. 23-24 (2007): 4540–53. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.03.027.

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Wroblewski, D. E., and Y. Joshi. "Liquid Immersion Cooling of a Substrate-Mounted Protrusion in a Three-Dimensional Enclosure: The Effects of Geometry and Boundary Conditions." Journal of Heat Transfer 116, no. 1 (1994): 112–19. http://dx.doi.org/10.1115/1.2910844.

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A three-dimensional computational study of steady natural convection cooling of a substrate-mounted protrusion (chip) in a rectangular enclosure filled with dielectric liquid is described. Energy is generated in the chip at a uniform rate Q. Conduction within the chip and substrate are accounted for in the model, as is the coupled natural convection in the surrounding liquid. The nondimensional governing equations with the appropriate boundary conditions have been solved in the primitive variable form for Ra = 108 using a fully implicit finite volume formulation. Baseline computations have bee

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Lee, Y. Y., and C. F. Ng. "The Effects of Coupled Source/cavity modes on the Acoustic Insertion Loss of Close-Fitting Enclosures." Building Acoustics 2, no. 4 (1995): 549–67. http://dx.doi.org/10.1177/1351010x9500200401.

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This paper reports a theoretical and experimental study of the prediction of the insertion loss for low frequency noise from close-fitting enclosures. Experimental work has been carried out for various small panel designs with several common structural materials using a special test rig. The theoretical model considers not only the modal response of the enclosure plate but also the 3 dimensional acoustic modes in the air gap and the modal component of the source plate. The theory and the experiments show two important points; 1) the contribution of the non-fundamental mode of the source plate

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Asako, Y., H. Nakamura, Y. Yamaguchi, and M. Faghri. "Three-Dimensional Natural Convection in a Vertical Porous Layer With a Hexagonal Honeycomb Core." Journal of Heat Transfer 114, no. 4 (1992): 924–27. http://dx.doi.org/10.1115/1.2911902.

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Numerical solutions are obtained for a three-dimensional natural convection heat transfer problem in a vertical porous layer with a hexagonal honeycomb core. The porous layer is assumed to be long and wide such that the velocity and temperature fields repeat themselves in successive enclosures. The natural convection problem is solved for only one honeycomb enclosure with periodic thermal boundary conditions. The porous layer is assumed to be homogeneous and isotropic and the flow is obtained by using the Darcian model. The numerical methodology is based on an algebraic coordinate transformati

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37

Piao, L. H., Qi Rui Yang, and J. J. Zhao. "Study of the Gas Pendulum Characteristic of Enclosure with Small Size." Applied Mechanics and Materials 635-637 (September 2014): 782–85. http://dx.doi.org/10.4028/www.scientific.net/amm.635-637.782.

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The flow and temperature fields caused by point heat source were obtained with the method of FEA (finite element analysis), and the pendulum characteristic of nature convection gas in two-dimensional enclosure with small size was validated and explained. The results are as follow: (1) Whether in horizontal status or in tilting status, under the function of buoyancy lift, the direction of nature convection gas always keeps vertical upwards in two-dimensional enclosure, and it has the pendulum characteristic.(2)The temperatures of two points on the same isotherm are no longer equal. When the til

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Souayeh, Basma, Nader Ben-Cheikh, and Brahim Ben-Beya. "Periodic behavior flow of three-dimensional natural convection in a titled obstructed cubical enclosure." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 9 (2017): 2030–52. http://dx.doi.org/10.1108/hff-03-2016-0096.

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Purpose The purpose of this paper is to examine numerically the three natural convection of air induced by temperature difference between a cold outer cubic enclosure and a hot inner cylinder. Simulations have been carried out for Rayleigh numbers ranging from 103 to 107 and titled angle of the enclosure from 0° to 90°. The developed mathematical model is governed by the coupled equations of continuity, momentum and energy, and is solved by finite volume method. The effects of cylinder inclination and Rayleigh number on fluid flow and heat transfer are presented. The distribution of isocontour

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Sarr, J., C. Mbow, H. Chehouani, B. Zeghmati, S. Benet, and M. Daguenet. "Study of Natural Convection in an Enclosure Bounded by Two Concentric Cylinders and Two Diametric Planes." Journal of Heat Transfer 117, no. 1 (1995): 130–37. http://dx.doi.org/10.1115/1.2822292.

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The two-dimensional heat transfer induced by free laminar convection in an enclosure is numerically investigated in this work. A constant wall heat flux is applied on the inner cylinder while the outer is maintained at an uniform temperature, the others walls being adiabatic. The influence of the modified Grashof number (102 ≤ Gr ≤ 106) and an aspect Fr on convective motion and heat transfer is examined. A comparison of the heat transfer between different fluids such as air, ammonia–liquid, and carbon dioxide–liquid is also displayed. Holographic interferometry is used to visualize the tempera

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Koo, H. M., K. B. Cheong, and T. H. Song. "Schemes and Applications of First and Second-Order Discrete Ordinates Interpolation Methods to Irregular Two-Dimensional Geometries." Journal of Heat Transfer 119, no. 4 (1997): 730–37. http://dx.doi.org/10.1115/1.2824177.

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This paper presents numerical schemes and comparison of predictions of radiative heat transfer for the first and the second order discrete ordinates methods (DOM1 and DOM2) using an interpolation scheme. The formulations are followed by derivation of numerical schemes for two-dimensional body fitted grids. With varying the optical depths and the numbers of grids and ordinates, radiative wall heat fluxes by DOM1 and DOM2 are calculated to compare with the exact solutions for three kinds of two-dimensional enclosures (square, quadrilateral, and J-shaped) containing absorbing/emitting and nonscat

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Sana Jaafar Yaseen. "Numerical Study of Steady Natural Convection Flow in A Prismatic Enclosure with Strip Heater on Bottom Wall Using Flexpde." Diyala Journal of Engineering Sciences 7, no. 1 (2014): 61–80. http://dx.doi.org/10.24237/djes.2014.07105.

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Laminar natural convection in two-dimensional Prismatic enclosure is studied and analysis numerically. For the enclosure top inclined walls are considered at low temperature, two vertical walls are adiabatic and strip heater at constant high temperature mounted on the bottom enclosure, while the reminder bottom wall kept at low known temperature. The partial differential equations for two dimensional conservation of mass, momentum and energy are solved using finite element software package (FLEXPDE.5). For Rayleigh number varying from 103 to 105 and for constant Prandtal number Pr=0.7 the chan

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Fazuruddin, Syed, Seelam Sreekanth, and G. Sankara Sekhar Raju. "Effect of Various Tilted Positions of a Thin Fin on Natural Convection of Laminar Viscous Flow in a Square Cavity." International Journal of Heat and Technology 39, no. 5 (2021): 1634–42. http://dx.doi.org/10.18280/ijht.390527.

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An exhaustive numerical investigation is carried out to analyze the role of an isothermal heated thin fin on fluid flow and temperature distribution visualization in an enclosure. Natural convection within square enclosures finds remarkable pragmatic applications. In the present study, a finite difference approach is performed on two-dimensional laminar flow inside an enclosure with cold side walls and adiabatic horizontal walls. The fluid flow equations are reconstructed into vorticity - stream function formulation and these equations are employed utilizing the finite-difference strategy with

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Acikgoz, Ozgen, Olcay Kincay, and Zafer Utlu. "Determination of the Effect of Wall Heating Systems on Convective Heat Transfer Coefficient in Buildings." Advanced Materials Research 875-877 (February 2014): 1630–36. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1630.

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Decreasing energy consumption and advancing thermal comfort are the most important aims of building engineering. Previously reported studies by many researchers have found that different usages of convective heat transfer coefficient (CHTC) correlations in heating system simulations have considerable impacts on calculated heating load in buildings. Hence, correct utilization of CHTCs in real size room enclosures has great importance for both energy consumption and thermal comfort. In this study, a modeled room was numerically heated from one vertical wall and cooled from the opposite wall in o

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Bourouis, Abderrahim, Abdeslam Omara, and Said Abboudi. "Upward and downward conjugate mixed convection heat transfer in a partially porous cavity." International Journal of Numerical Methods for Heat & Fluid Flow 26, no. 1 (2016): 159–88. http://dx.doi.org/10.1108/hff-01-2015-0037.

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Purpose – The purpose of this paper is to provide a numerical study of conjugate heat transfer by mixed convection and conduction in a lid-driven enclosure with thick vertical porous layer. The effect of the relevant parameters: Richardson number (Ri=0.1, 1, 10) and thermal conductivity ratio (Rk=0.1, 1, 10, 100) are investigated. Design/methodology/approach – The studied system is a two dimensional lid-driven enclosure with thick vertical porous layer. The left vertical wall of the enclosure is allowed to move in its own plane at a constant velocity. The enclosure is heated from the right ver

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Khetib, Yacine, Ahmad Aziz Alahmadi, Ali Alzaed, Ahamd Tahmasebi, Mohsen Sharifpur, and Goshtasp Cheraghian. "Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects." Processes 9, no. 8 (2021): 1277. http://dx.doi.org/10.3390/pr9081277.

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The authors of the present paper sought to conduct a numerical study on the convection heat transfer, along with the radiation and entropy generation (EGE) of a nanofluids (NFs) in a two and three-dimensional square enclosure, by using the FVM. The enclosure contained a high-temperature blade in the form of a vertical elliptical quadrant in the lower corner of the enclosure. The right edge of the enclosure was kept at low temperature, while the other edges were insulated. The enclosure was subjected to a magnetic field (MGF) and could be adjusted to different angles. In this research, two labo

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Du, Z. G., and E. Bilgen. "Effects of Heat Intensity, Size, and Position of the Components on Temperature Distribution Within an Electronic PCB Enclosure." Journal of Electronic Packaging 112, no. 3 (1990): 249–54. http://dx.doi.org/10.1115/1.2904374.

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Natural convection heat transfer has been studied in a sealed small PCB enclosure of three heated components which are mounted on a PCB plate within a large console cooled by vented airflow. A two-dimensional laminar flow model is used with appropriate boundary conditions. Detailed influences of each parameter, such as intensity, size, and position of the heaters on temperature and flow distributions within the enclosure have been studied. The favorable component arrangements for various cases have been determined.

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Nashine, Prerana, and A. K. Satapathy. "STUDY OF HEAT TRANSFER AFFECTED BY RADIATION IN A TWO DIMENSIONAL ENCLOSURE." International Journal on Design and Manufacturing Technologies 9, no. 2 (2015): 19–22. http://dx.doi.org/10.18000/ijodam.70154.

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Silva, Humberto, and Brian Carnes. "Fully Two-Dimensional Verification Problem for Coupled Heat Conduction and Enclosure Radiation." Journal of Thermophysics and Heat Transfer 30, no. 4 (2016): 799–803. http://dx.doi.org/10.2514/1.t4694.

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Sadat, H., and P. Salagnac. "FURTHER RESULTS FOR LAMINAR NATURAL CONVECTION IN A TWO-DIMENSIONAL TRAPEZOIDAL ENCLOSURE." Numerical Heat Transfer, Part A: Applications 27, no. 4 (1995): 451–59. http://dx.doi.org/10.1080/10407789508913711.

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Mishra, Aashwin A., Nadeem Hasan, Sanjeev Sanghi, and Ranganathan Kumar. "Two-dimensional buoyancy driven thermal mixing in a horizontally partitioned adiabatic enclosure." Physics of Fluids 20, no. 6 (2008): 063601. http://dx.doi.org/10.1063/1.2931567.

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