Passive heat and moisture removal from a natural vented enclosure with a massive wall

Liu, Di; Zhao, Fu-Yun; Wang, Hanqing

doi:10.1016/j.energy.2011.02.029

Cited by 33 publications

(10 citation statements)

References 36 publications

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“…(25) is strongly dependent on the non-homogeneous Dirichlet conditions. Most of earlier works [42,48] are limited within two adiabatic walls where Dirichlet boundary condition is either 0 or Nu at the adiabatic walls. For the situations of differential heating of walls (case 2; Fig.…”

Section: Streamfunction and Heatfunctionmentioning

confidence: 99%

“…A few earlier researchers analyzed heatline concept for various physical situations [39][40][41][42][43][44][45][46][47][48][49]. Bello-Ochende [39] studied Poissontype heatfunction for thermal convection in a square cavity.…”

Section: Introductionmentioning

confidence: 99%

“…Zhao et al [45] carried out numerical studies with streamlines, heatlines and masslines of steady state double-diffusive natural convection induced by bottom heating and polluting with two finite thermal and pollutant strips. A few other applications on heatlines studies involve forced convection in a porous media [46], double-diffusive convection in a porous enclosure [47] and conjugate natural convection/heat conduction [48,49]. The objective of this article is to analyze the flow and thermal characteristics of water and nanofluids (Cu-Water, TiO 2 -Water and Alumina-Water) confined within square cavity with various heating patterns of walls.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heatline analysis on natural convection for nanofluids confined within square cavities with various thermal boundary conditions

Basak

Chamkha

2012

International Journal of Heat and Mass Transfer

190

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Section: Streamfunction and Heatfunctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heatline analysis on natural convection for nanofluids confined within square cavities with various thermal boundary conditions

Basak

Chamkha

2012

International Journal of Heat and Mass Transfer

190

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“…They have demonstrated heatlines, masslines and streamlines to visualize the heat and fluid flows. The heatline applications may further involve conjugate natural convection or heat conduction (see Liu et al [13], Zhao et al [14]), doublediffusive convection in a porous enclosure (see Zhao et al [15]), and forced convection in a porous media (see Morega and Bejan [16]). However, a comprehensive analysis on heat flow during natural convection in a prismatic enclosure heated from below with the heatline approach has not studied yet.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation for Heatline Visualization of Natural Convective Flow and Heat Transfer inside a Prismatic Enclosure

Alam¹,

Rahman²,

Parvin³

et al. 2016

IJHT

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Finite element simulation is performed visualizing heat flow through heatlines for a free convection flow and heat transfer in an air-filled prismatic enclosure. This configuration has applications in collecting solar energy in attic spaces of greenhouses and buildings having pitched roofs. The top inclined walls of the enclosure are considered at constant low temperature, two vertical walls are adiabatic whereas the bottom wall is heated isothermally as well as non-isothermally. The Galerkin weighted residual finite element method is used to solve the governing non-linear partial differential equations. The simulated results are displayed through streamlines, isotherms and heatlines to examine the effects of buoyancy on the flow and thermal fields. The Rayleigh number's effects on average temperature and velocity fields are also calculated and displayed graphically. The results indicate that for a uniformly heated bottom wall both the average temperature and the average velocity in the cavity are higher compared to the non-uniformly heated bottom wall. Furthermore, heatlines were observed to predict the energy transfer better than those of the isothermal lines.

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“…In the past decades, the streamlines, heatlines, and masslines are unified and extended to natural, forced, or mixed convective transport in porous media, reacting flows, and anisotropic media. [23][24][25] Interestingly, Zhao and colleagues 26,27 have applied the concept of heatline/ massline to study double-diffusive natural convection in the porous or fluid saturated enclosures. The heatline and massline represent non-crossed conduits for flow of heat and species, respectively, and thus their shapes give a global picture of heat and species transport, in much the same way as the streamlines provide information on mass flow in single-component systems.…”

Section: Introductionmentioning

confidence: 99%

Double-diffusive mixed convection in the slot ventilated enclosure with different arrangements of supplying air flow ports

Cheng

Liu

et al. 2015

Advances in Mechanical Engineering

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Steady double-diffusive mixed convection in an enclosure with side venting and discrete heat and contaminant sources is numerically studied under supplying upside and returning downside (STRB) mode and returning upside and supplying downside mode (RTSB), respectively. The parameters governing the fluid flow include the Grashof number Gr (10 2 -10 6 ), Reynolds number Re (100-500), supplying or returning distance H 1 /H T (0-2), Prandtl number Pr (0.7), buoyancy ratio N, and Schmidt number Sc. Effects of Gr, Re, and H 1 /H T on the flow patterns, thermal, and species transports were numerically investigated concerning STRB and RTSB modes. Fluid flow, heat, and species transports in the enclosure are visualized and analyzed by the contours of stream function, heat function, and mass function, respectively. Air age was also presented to evaluate the freshness of the enclosed fluid. Averaged Nusselt number of the heat source and Sherwood number of the contaminant source are power-law correlated with Gr, Re, and H 1 /H T for two ventilation modes, respectively. The correlations demonstrate that the ratio of averaged Nusselt number to Sherwood number was approximately approaching unity, independent of ventilation modes and values of H 1 /H T . This investigation could benefit the future design of room ventilation and thermal removals from the electronic chips.

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Passive heat and moisture removal from a natural vented enclosure with a massive wall

Cited by 33 publications

References 36 publications

Heatline analysis on natural convection for nanofluids confined within square cavities with various thermal boundary conditions

Heatline analysis on natural convection for nanofluids confined within square cavities with various thermal boundary conditions

Finite Element Simulation for Heatline Visualization of Natural Convective Flow and Heat Transfer inside a Prismatic Enclosure

Double-diffusive mixed convection in the slot ventilated enclosure with different arrangements of supplying air flow ports

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