Showing papers in "International Journal of Heat and Mass Transfer in 1995"

TL;DR: In this paper, the authors developed a jump condition based on the non-local form of the volume averaged momentum equation, which produces a jump in the stress but not in the velocity, and this has important consequences for heat transfer processes.

TL;DR: In this paper, the Kolmogorov velocity scale was introduced to account for the near-wall and low-Reynolds-number effects in both attached and detached flows.

TL;DR: In this article, a stress jump condition was developed based on the non-local form of the volume averaged Stokes' equations and the excess stress terms that appeared in the jump condition were represented in a manner that led to a tangential stress boundary condition containing a single adjustable coefficient of order one.

TL;DR: In this article, the generalized lagging behavior in solids under high-rate heating is derived by precise correlation with the hyperbolic two-step model, where the ballistic behavior of heat transport in the electron gas is captured by the second-order effect of the phase lag of the heat flux vector.

TL;DR: In this paper, the authors derived the interfacial area transport equation from the statistical model of fluid particle number transport equation, which includes the source and sink terms due to the particle interactions and interfacial phase change.

TL;DR: In this article, the effects of spray nozzle, volumetric flux, subcooling and working fluid were investigated for nucleate boiling heat transfer and critical heat flux for full cone sprays.

TL;DR: In this article, the authors studied the rate of heat transfer for flow through a periodic array of wavy passages with an accurate numerical scheme, and observed that self-sustained oscillations lead to the destabilization of laminar thermal boundary layers, replenish the nearwall fluid with the fluid in the core region, and thus provide a natural mechanism of heat and mass transfer enhancement.

TL;DR: In this paper, a parabolic solver for steady-state equations in r−z two dimensions, a k−ϵ model for turbulence and a steam table library for physical properties of supercritical water cooling in a vertical pipe is numerically analyzed.

TL;DR: In this article, the steady natural convection in an enclosure heated from below and symmetrically cooled from the sides is studied numerically, using a stream function-vorticity formulation.

TL;DR: In this article, an experimental investigation was conducted to determine the heat transfer characteristics and cooling performance of rectangular-shaped microgrooves machined into stainless steel plates, using methanol as the cooling fluid, with different aspect ratios and a variety of center-to-center spacings.

TL;DR: In this article, the constraints that must be satisfied in order that the principle of local thermal equilibrium be valid are presented. But these constraints are not applicable to the case of transient heat conduction in two-phase systems.

TL;DR: In this paper, an inverse analysis utilizing the conjugate gradient method of minimization and the adjoint equation is used for simultaneously estimating the temperature-dependent thermal conductivity and heat capacity per unit volume of a material.

TL;DR: In this article, the effects of the permeability, thermal conductivity and the thickness of the porous material are investigated using a Brinkman-extended Darcy model, and it is shown that there exists a critical thickness of a porous layer at which heat transfer is minimum in the case of low thermal conductivities materials, while this does not show for highly conducting materials.

TL;DR: In this article, numerical simulations of columnar dendritic solidification of a Pb-20 wt% Sn alloy in a square cavity cooled from one side and fed by a rectangular riser are reported.

TL;DR: In this paper, the authors report the thermodynamic optimization of a heat-driven refrigeration plant, that is, a refrigerator without work input, which is driven by a heat source.

TL;DR: In this paper, an inverse analysis is used to estimate linearly temperature dependent thermal conductivity components k x (T ), k y (T ) and specific heat capacity C ( T ) per unit volume for an orthotropic solid.

TL;DR: In this article, an absorption-line blackbody distribution function for CO2 is presented which permits efficient and accurate calculation of total heat transfer rates, allowing the local absorption coefficient to be the basic radiative property, permitting its use in arbitrary solution methods of the RTE.

TL;DR: In this article, the influence of channel orientation and wall heating condition on the local surface heat transfer coefficient in a rotating, two-pass, square channel with 60° and 90° ribs on the leading and trailing walls were investigated for Reynolds numbers from 2500 to 25 000 and rotation numbers from 0 to 0.352.

TL;DR: In this article, a numerical study is made of double-diffusive natural convection in a rectangular fluid-saturated vertical porous enclosure, where the flows are driven by conditions of uniform heat and mass fluxes imposed along the two vertical side walls of the cavity where the two buoyancy effects can either augment or counteract each other.

TL;DR: In this article, the authors measured the pool boiling heat transfer coefficients in pure R-114 and R -114-oil mixtures for a bundle of smooth tubes and three enhanced tube bundles (finned, structured and porous).

TL;DR: In this paper, numerical studies of three-dimensional flows in a cubical container with a stable vertical temperature stratification are carried out, where flows are driven by the top lid, which slides in its own plane at a constant speed.

TL;DR: In this paper, models for simulating transport phenomena occurring during solidification of a binary metal alloy are reviewed, with emphasis placed on the benefits and shortcomings of existing continuum and two-phase approaches.

TL;DR: In this article, the trigger mechanism for critical heat flux (CHF) on 10-, 30-and 110mm long heaters which were mounted along one wall of a rectangular channel was explored.

TL;DR: In this paper, a CAD-based intelligent spray quenching system capable of optimizing the mechanical properties (strength, hardness) of age-hardenable aluminum alloys was successfully modeled using the finite element method.

TL;DR: In this article, the phenomenon of natural convection in trapezoidal enclosures where upper and lower walls are not parallel, in particular a triangular geometry, is re-examined over a parameter domain in which the aspect ratio of the enclosure ranges from 0.1 to 1.0, the Rayleigh number varies between 102 and 105, and the Prandtl numbers correspond to air and water.

TL;DR: In this paper, a simple thermodynamic model that captures the universal aspects of chiller behavior is proposed to predict chiller performance over a broad range of operating conditions from a small number of selected measurements, as well as a diagnostic tool.

TL;DR: In this article, the optimal spacing between horizontal cylinders in an array with laminar natural convection, such that the total heat transfer between the array and the ambient is maximized, is investigated.

TL;DR: In this article, the authors show that the power output of various power plant configurations can be maximized by properly dividing the fixed inventory of heat exchange equipment among the heat transfer components of each plant.