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Showing papers in "International Journal of Heat and Fluid Flow in 1994"


Journal ArticleDOI
TL;DR: In this paper, the natural-convection boundary-layer flow on a vertical surface generated by Newtonian heating in which the heat transfer from the surface is proportional to the local surface temperature is discussed.

255 citations


Journal ArticleDOI
TL;DR: The report deals with general aspects of modeling complex turbulent flows, but is restricted to incompressible (or mildly compressible) fluid, with particular focus on computation of wall flows.

252 citations


Journal ArticleDOI
TL;DR: In this article, the turbulent flow field in a tube has been experimentally studied when fluid is injected tangentially, and the experiments were conducted by injecting air through injectors placed on the periphery of an 88.9 mm inside diameter and 1.5 m long acrylic tube.

172 citations


Journal ArticleDOI
TL;DR: In this paper, the authors derived the shear lift force on a spherical bubble in an unbounded shear flow at low Reynolds number, which is two thirds of that for a solid sphere.

130 citations


Journal ArticleDOI
TL;DR: In this article, the Von Neumann stability analysis on the finite-difference equations of a pipe shows that the equations are unconditionally stable and an iterative convergence method is applied to the calculation of node pressure at junctions in networks.

122 citations


Journal ArticleDOI
TL;DR: In this paper, the results of a numerical investigation of combined surface radiation and free convection in a square cavity with air as the intervening medium are reported, with the computations have been performed for 103 ≤ Gr ≤ 106, and the emissivities of all the walls varying between 0 and 1.

80 citations


Journal ArticleDOI
TL;DR: In this article, the second-moment closure was adopted to capture the augmentation and attenuation of mixing near the pressure and suction surfaces, which is consistent with experimental data but not with direct numerical simulations.

74 citations


Journal ArticleDOI
Toru Fusegi1, Jae Min Hyun2
TL;DR: In this article, a state-of-the-art review is provided for analyses on sidewall-heated natural convection flows in an enclosure, with particular emphasis on those subjected to nonideal physical conditions.

70 citations


Journal ArticleDOI
TL;DR: In this paper, the numerical results of the fundamental problem of interaction of surface radiation with free convection in an open cavity with air as the intervening medium have been reported and correlations have been developed for convective as well as radiative transfer based on numerical results.

66 citations


Journal ArticleDOI
TL;DR: In this article, the heatlines of a flow in which the wall serves as heat sink are compared to those of the same flow with a wall that serves as a heat source, and the heatline pattern in the corresponding two-dimensional space filled with seepage flow through a porous medium.

49 citations


Journal ArticleDOI
TL;DR: The Nusselt number in the developing region of a torus is found to be oscillatory as discussed by the authors, where the governing equations are fully parabolized in the axial direction and are written in an orthogonal helical coordinate system.

Journal ArticleDOI
TL;DR: In this article, the authors studied the pressure drop and heat transfer through bundles of parallel cylinders in a domain that has been overlooked, namely, low Reynolds numbers, arrays that are long in the direction of flow such that the flow is hydraulically and thermally fully developed, and cylinders inclined relative to the flow direction.

Journal ArticleDOI
TL;DR: In this paper, the Navier-Stokes equations were used to estimate the way in which swirling flow in a pipe decays, using an order-of-magnitude analysis and a turbulent viscosity computed as part of the solution.

Journal ArticleDOI
TL;DR: In this paper, a digital data acquisition system was used to collect statistical information of turbulent burst length for a zero-pressure-gradient transitional boundary layer developing on a flat plate with a free-stream turbulence level of 1%.

Journal ArticleDOI
TL;DR: In this paper, a correlation is formulated for the prediction of limiting heat flux and quality of density-wave-type oscillations in a single-channel, high-pressure forced-convection boiling upflow system using water as working fluid.

Journal ArticleDOI
TL;DR: In this article, a combined experimental and theoretical study has been carried out to investigate mixed-convection heat transfer in a narrow, vertical cavity, where the left wall of the cavity was cooled and the opposite (right wall) was heated.

Journal ArticleDOI
TL;DR: In this paper, the effects of a base step in the exit plane of a slot on a supersonic jet blown over a convex coanda surface has been studied experimentally on a planar or two-dimensional model.

Journal ArticleDOI
TL;DR: In this article, a rotating cavity with an axial throughflow of air is used as an experimental model for a pair of gas turbine, high-pressure compressor disks, and the measurements of cavity air temperature and cavity heat transfer were used to estimate the fraction of the central throughflow entering the cavity.

Journal ArticleDOI
TL;DR: In this paper, the concept of effective Rayleigh number was introduced in the context of convection in a vertically inhomogeneous horizontal layer, and estimates for this quantity, based on mean values of the physical quantities, were proposed.

Journal ArticleDOI
TL;DR: In this article, a numerical investigation was carried out to predict the simultaneously developinh steady laminar flow and heat transfer to a purely viscous non-Newtonian fluid described by a power law model flowing between two parallel plates.

Journal ArticleDOI
TL;DR: In this article, the Brinkman-Forchheimer-extended Darcy Model is used to characterize the flow field inside the porous region, and an innovative way of altering and control of the flow and heat-transfer characteristics of an external surface.

Journal ArticleDOI
B.K. Rao1
TL;DR: The fully developed turbulent Fanning friction factors and Nusselt numbers for purely viscous power-law non-Newtonian fluids in helical coils were measured experimentally.

Journal ArticleDOI
TL;DR: In this paper, a two-dimensional numerical computation has been made for an unsteady flow in a channel obstructed by an inserted square rod, and the results of the computation made for the flow with a parabolic inlet velocity profile at a specific value of channel Reynolds number are analyzed in detail.

Journal ArticleDOI
TL;DR: In this article, an analytical and numerical study of steady-state natural convection in a two-dimensional rectangular porous cavity saturated by a non-Newtonian fluid is reported.

Journal ArticleDOI
TL;DR: In this article, combined free and forced convection for developed flow in a curved pipe with arbitrary curvature ratio is studied numerically, where the curved pipe is heated with axially uniform heat flux, while the wall temperature is maintained peripherally uniform.

Journal ArticleDOI
TL;DR: In this article, a linear stability analysis is carried out, for the case of rigid conducting horizontal boundaries, in terms of horizontal and vertical Rayleigh numbers, RH and RV, respectively, for any Prandtl number, Pr, and incorporates the case, RV = 0.

Journal ArticleDOI
TL;DR: In this paper, a numerical code based on the SIMPLE algorithm and defined on a nonstaggered grid was used to simulate the natural convection in a cavity heated by the nonuniform absorption of radiation entering through part of the surface.

Journal ArticleDOI
TL;DR: In this paper, a combined computational and experimental study of the flow between two contrarotating discs for −1 ≤ Γ ≤ 0 (where Γ is the ratio of the speed of the slower disc to that of the faster one) for the case where there is a superposed radial outflow of air is presented.

Journal ArticleDOI
TL;DR: In this paper, a model for a local description of the energy transfer phenomenon in two distinct flow regions, one consisting of a Newtonian incompressible fluid and the other represented by a binary (solid-fluid) saturated mixture, is proposed Compatability conditions at the interface (purefluid-mixture) for momentum and energy transfer are also proposed and discussed

Journal ArticleDOI
TL;DR: In this article, the modeling of laminar, fully developed mixed convection flow of a Bingham plastic in a vertical eccentric annulus, in which the walls are held at asymmetric constant temperatures is investigated.