Lattice Boltzmann analysis of natural convection in a partially heated open ended enclosure for different fluids

Gangawane, Krunal M.; Bharti, Ram P.; Kumar, Surendra

doi:10.1016/j.jtice.2014.11.020

Cited by 39 publications

(8 citation statements)

References 55 publications

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“…The average deviation of the two (present and literature) values is seen to be about 0.6%. Such minor inherent errors tend to arise due to the enormous factors such as numerical methodologies, grid size, convergence criterion, approximations errors (round up and programming), etc [45,[49][50][51][52][59][60][61][62][63][64][65][66]. Keeping in mind the above mentioned inadvertent factors influencing the numerical results, the above comparison ascertains the confidence in the accuracy and reliability of the present in-house PS-TLBM solver.…”

Section: Validation Of Resultsmentioning

confidence: 94%

Lattice Boltzmann analysis of effect of heating location and Rayleigh number on natural convection in partially heated open ended cavity

Gangawane

Bharti

Kumar

2015

Korean J. Chem. Eng.

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Natural convection characteristics of a partially heated open ended square cavity have been investigated numerically by using an in-house computational flow solver based on the passive scalar thermal lattice Boltzmann method (PS-TLBM) with D2Q9 (two-dimensional and nine-velocity link) lattice model. The partial part of left wall of the cavity is heated isothermally at either of the three different (bottom, middle and top) locations for the fixed heating length as half of characteristic length (H/2) while the right wall is open to the ambient conditions. The other parts of the cavity are thermally isolated. In particular, the influences of partial heating locations and Rayleigh number (10 3 ≤ Ra≤10 6 ) in the laminar zone on the local and global natural convection characteristics (such as streamline, vorticity and isotherm contours; centerline variations of velocity and temperature; and local and average Nusselt numbers) have been presented and discussed for the fixed value of the Prandtl number (Pr=0.71). The streamline patterns show qualitatively similar nature for all the three heating cases and Rayleigh numbers, except the change in the recirculation zone which is found to be largest for middle heating case. Isotherm patterns are shifted towards a partially heated wall on increasing Rayleigh number and/or shifting of heating location from bottom to top. Both the local and average Nusselt numbers, as anticipated, shown proportional increase with Rayleigh number. The cavity with middle heating location shown higher heat transfer rate than that for the top and bottom heating cases. Finally, the functional dependence of the average Nusselt number on flow governing parameters is also presented as a closure relationship for the best possible utilization in engineering practices and design.

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Section: Validation Of Resultsmentioning

confidence: 94%

Lattice Boltzmann analysis of effect of heating location and Rayleigh number on natural convection in partially heated open ended cavity

Gangawane

Bharti

Kumar

2015

Korean J. Chem. Eng.

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“…For instance, the flow behavior may be modified to provide proper flow acceleration through manipulating the geometrical parameters such as the enclosure shape, inclination angle, aspect ratio and the heat source location [5]. Although numerous models of the classical open enclosures [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and non-classical ones [25][26][27] have been designed by many researchers for investigating and describing the natural convection processes in energy related applications, considerable efforts are still needed to acquire an optimum enclosure design that meet the requirements for the efficient heat transfer process. In fact, one of the most important geometries of the enclosures is the parallelogrammic shape.…”

Section: Introductionmentioning

confidence: 99%

MHD Natural Convection in a Fully Opened Parallelogrammic Enclosure Filled with Copper–Water Nanofluid and Partially Heated from its Left Sidewall

Ghani

Khammas

Mustafa

et al. 2020

ARFMTS

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The present work examined numerically for the first time, the magneto-hydrodynamics (MHD) natural convection flow and heat transfer in a fully opened parallelogrammic enclosure filled with copper-water nanofluid and subjected to a straight magnetic field. Both the upper and lower inclined walls of the enclosure are kept cold, while its right sidewall is considered fully opened to the environment. The left sidewall of the enclosure is heated partially, while the remaining parts of it are considered thermally insulated. The ranges of this study are, Hartmann number (0  Ha  75), nondimensional heat source location (0.25    0.75), Rayleigh number (10 4  Ra  10 6), solid volume fraction (=0.04), and the inclination angle of the upper and the lower walls (-60°    60°). The non-dimensional heat source length is considered fixed at [ = 0.25]. For all Hartmann numbers, It was found that for [Ra =10 6 ] , the maximum

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“…Gangawane et al studied natural convection in a partially heated open‐ended cavity for three different ﬂuid types including air, R‐12, and water for different Rayleigh and Prandtl numbers. The analysis was conducted using the Lattice Boltzmann method.…”

Section: Introductionmentioning

confidence: 99%

Impact of cavity chord shape on the free convection heat transfer rate in a triangular cavity

Rabani¹

2019

Heat Trans. Asian Res.

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In this study, the effect of different chord shapes of a triangular cavity has been investigated on the natural convection heat transfer characteristics inside the cavity using the commercial ANSYS‐FLUENT software. Heat transfer phenomena have been regarded as very significant due to the widespread application of natural convection heat transfer in different engineering fields. According to the performed studies, the chord with partitions can considerably enhance the natural convection heat transfer rate inside the cavity. Four different types of partitions including zigzag, two types of rectangular and sinusoidal were considered on the chord of the triangular cavity. The dimensionless parameters investigated in the results include Rayleigh number, Prandtl number, and Nusselt number. The results comprise the isotherm lines, streamlines, velocity lines, local and average Nusselt numbers analyzed with regard to the chord type and Rayleigh number variation. The results revealed that the temperature trend is almost the same for all configurations. Furthermore, the average Nusselt number value in zigzag and sinusoidal is higher in comparison with other cases due to the larger heat transfer area. Finally, by examining the streamlines, isotherm and velocity lines, average and local Nusselt numbers, it was founded that the cavities with zigzag and sinusoidal chord shape have the better performance in terms of heat transfer rate.

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Lattice Boltzmann analysis of natural convection in a partially heated open ended enclosure for different fluids

Cited by 39 publications

References 55 publications

Lattice Boltzmann analysis of effect of heating location and Rayleigh number on natural convection in partially heated open ended cavity

Lattice Boltzmann analysis of effect of heating location and Rayleigh number on natural convection in partially heated open ended cavity

MHD Natural Convection in a Fully Opened Parallelogrammic Enclosure Filled with Copper–Water Nanofluid and Partially Heated from its Left Sidewall

Impact of cavity chord shape on the free convection heat transfer rate in a triangular cavity

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