Experiments on Free Convection Between Vertical Plates With Symmetric Heating

Wirtz, R. A.; Stutzman, R. J.

doi:10.1115/1.3245121

Cited by 101 publications

(33 citation statements)

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“…Free convection in a parallel plate channel without internal bodies has been investigated by many researchers, e.g. Bodoia and Osterle, 1 Aung et al, 2 Sparrow et al, 3 Yan and Lin, 4 Writs and Stutzman, 5 Sparrow and Azevedo, 6 and Kim et al 7 Considering the ®nite dierence solution, it is a common practice to neglect axial diusion and assume uniform pressure across the channel. It allows the solution to be carried out by marching from the inlet at the bottom; but an iterative process of matching the exit pressure to determine the unknown velocity at the inlet is required.…”

Section: Introductionmentioning

confidence: 99%

Free Convection in Channel-an Alternative Numerical Approach and Illustrations

Bhattacharyya¹

1997

Commun. Numer. Meth. Engng.

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SUMMARYA ®nite dierence method of solving problems of free convection in a parallel plate channel with or without internal obstructions is presented. It uses the steady-state governing equations including the axial diusion terms, and it does not require pressure matching or conditions to obtain the solution. The buoyancy-induced upward velocity is self-generated without requiring any extra eort or strategy over that normally used for iterative ®nite dierence solution of elliptic equations. The method simply uses the average upward velocity from one iteration to the next until convergence. Comparison and a few illustrations are included to indicate the validity and usefulness of the method.

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Section: Introductionmentioning

confidence: 99%

Free Convection in Channel-an Alternative Numerical Approach and Illustrations

Bhattacharyya¹

1997

Commun. Numer. Meth. Engng.

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“…Wirtz and Stutzman [1] have measured the surface temperatures and the local heat transfer coefficients of a test plate placed at the center of a four-plate array with a constant interval. The test plates were fabricated with a 3-mm-thick phenolic resin base plate and foil heaters, which were glued onto both surfaces of the base plate, and then plates were heated with constant and equal surface heat fluxes.…”

Section: Introductionmentioning

confidence: 99%

Fluid flow and heat transfer of natural convection around array of vertical heated plates

Kitamura

Mitsuishi

Misumi

2008

Heat Trans. Asian Res.

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Natural convective flows around an array of vertical heated plates were investigated experimentally. Main concerns were directed to the influences of plate numbers on the heat transfer characteristics of the plates. Both surfaces of the test plates were heated with constant and equal heat fluxes and their local heat transfer coefficients were measured. The results showed that the coefficients of the surfaces of the array facing outward became higher than those facing inward. The flow fields around the bottom of the plate array were visualized with smoke. The result showed that the ambient flow is directed from the sides to the center of the array and enters the parallel channel obliquely. These flows cause the above difference in the coefficients. While the difference gradually diminished in between the plates placed in the central section of the array, their coefficients asymptotically approach those of the analytical correlation that assumed a uniform velocity at the channel inlet.

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“…These studies were the foundations for few others studies conducted later on. Amongst these, the experimental work by Wirtz and Stutzman [6] on developing natural convection of air flowing between vertical parallel plates with uniform and symmetric heat fluxes is frequently quoted. An up to date review on the formulas for the calculation of the heat transfer and flow rate for twodimensional natural convection between vertical plates having uniform wall temperature or uniform heat flux boundary conditions was presented by Olsson [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of surface radiation on natural convective flows and onset of flow reversal in asymmetrically heated vertical channels

Bousetta

Chénier

et al. 2013

International Journal of Thermal Sciences

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To cite this version:R. Li, M. Bousetta, Eric Chénier, Guy Lauriat. Effect of surface radiation on natural convective flows and onset of flow reversal in asymmetrically heated vertical channels. International Journal of Thermal Sciences, Elsevier, 2013, 65 (-), pp.9-27. <10.1016/j.ijthermalsci.2012.10.023>. Effect of surface radiation on natural convective flows and onset of flow reversal in asymmetrically heated vertical channels AbstractNumerical solutions on the influence of surface radiation on the laminar air flow induced by natural convection in vertical, asymmetrically-heated channels are discussed. Variable property effects are accounted for in a full-elliptic mathematical formulation. The density variation is determined from the state equation for ideal gas. The experimental design and data reported in Webb and Hill [1] are taken as the base cases for carrying out the computations. The occurrence of flow reversals is first considered and revisited for pure natural convection, and the Nusselt number correlations derived from the numerical results are favorably compared with those reported in [1]. It is shown that the general effect of surface radiation is to delete the onset of pocketlike recirculations at the top part of the channel, to reduce the heated wall temperatures, and to increase the facing wall temperatures. Comparisons with usual methods used for decoupling the surface radiation effects are discussed. In the range of parameters investigated, increases in differences between inlet and maximum wall temperatures up to 200 K are shown to have small influences on the flow field and negligible effects on heat transfer performances.Keywords: Natural convection, surface radiation, vertical channels, flow reversal, variable property effects, numerical simulations order of consistency of the numerical scheme β thermal coefficient of volumetric expansion,

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Experiments on Free Convection Between Vertical Plates With Symmetric Heating

Cited by 101 publications

References 0 publications

Free Convection in Channel-an Alternative Numerical Approach and Illustrations

Free Convection in Channel-an Alternative Numerical Approach and Illustrations

Fluid flow and heat transfer of natural convection around array of vertical heated plates

Effect of surface radiation on natural convective flows and onset of flow reversal in asymmetrically heated vertical channels

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