Showing papers in "International Communications in Heat and Mass Transfer in 1994"

TL;DR: In this paper, the velocity distribution in steady state, hydrodynamically fully developed, laminar flow for Newtonian fluids in rectangular ducts is derived by using the finite Fourier transform.

TL;DR: In this paper, an exact solution has been obtained for the hydromagnetic free convection flow of a viscous incompressible and electrically conducting fluid generated by an impulsively moving vertical plate subject to constant heat flux at the plate has been considered.

TL;DR: In this article, a family of solutions of the coupled non-linear equations is presented using shooting numerical techniques for two point boundary value problems, and velocity and temperature profiles are shown for different values of the parameters Ha2/Re, Gr/Re2 and K.

TL;DR: In this article, the entropy generation of the laminar mixed-convective flow in a vertical channel with a series of transverse fins was investigated and the geometric configuration of the finned channel with higher second-law efficiency was proposed.

TL;DR: In this paper, the stability and onset of convection in a narrow, fluid saturated porous layer subject to a centrifugal body force due to rotation was investigated analytically, and the marginal stability criterion was established in terms of a critical centrifugal Rayleigh number and a critical wave number.

TL;DR: The results of a study of natural convection along an isothermal wavy cone embedded in a fluid-saturated porous medium are presented in this paper, where the boundary layer equations are solved numerically using the Keller-box method.

TL;DR: A survey of existing models turbulence for particulate turbulence modulation in two-phase flows is carried out and an improved model for considering the effects of the dispersed phase on the turbulence of the carrier phase is suggested as mentioned in this paper.

TL;DR: In this article, the authors investigated the heat transfer process involved in the autoclave curing of fiber-reinforced thermosetting composites and made recommendations for possible process improvement.

TL;DR: In this article, the experimental results of flow pattern for air-water horizontal flow in capillary tubes are reported and flow pattern regime maps are presented at different pressures (from 1 MPa up to 5 MPa).

TL;DR: In this article, a quasi-steady analytical solution is obtained for laser heating process, where the heat transfer equation is derived by considering three types of processes: Conduction, convection and phase change processes.

TL;DR: Forced convection within circular tubes, subjected to an axially variable wall heat flux, is analytically studied in this article, where the integral transform method is employed, in conjunction with a splitting-up procedure, to hield exact expressions for the temperature distributions and related Nusselt numbers along the thermal entry region.

TL;DR: In this paper, the finite element method was used to predict the temperature responses of a full scale conventional twist drill and the effects of the penetration depth, the cutting speed, the web thickness, and the helix angle on the drill temperature responses have been investigated.

TL;DR: In this paper, a numerical model was developed to simulate the dynamic behaviour of an ideal, liquid-liquid, concentric pipe, countercurrent heat exchanger, which is capable of providing time domain solution directly.

TL;DR: In this paper, an experimental investigation carried out to study the heat transfer coefficients during pool boiling of lithium bromide-water solutions over horizontal stainless steel tubes was carried out and the results indicated that the boiling phenomenon is not significantly affected by tube diameter.

TL;DR: In this paper, a numerical study of mixed convection in a parallel-plate vertical channel filled with a fluid-saturated porous medium and containing discrete heat sources at the walls is performed using the Brinkman-Forchheimer-extended Darcy model.

TL;DR: In this paper, the authors considered the optimum design of a convecting, rectangular fin with a step change in cross-sectional area, and solved the optimization problem using the method of Lagrange multipliers.

TL;DR: In this paper, the optimal sizes of bodies with specified external forced convection heat transfer, when the objective is to minimize the total rate of entropy generation, or the total cost, were derived.

TL;DR: In this article, an analytical approach based on the conservation of angular momentum flux was proposed to predict the decay of swirling motion due to frictional effects along a straight duct, where a combined forced vortex and shear-type velocity profiles were used.

TL;DR: In this article, the modeling of laminar, fully-developed, combined convection flows of non- Newtonian fluids in a vertical parallel-plate duct, where the walls are held at asymmetric uniform temperatures is considered.

TL;DR: In this paper, the effects of neglecting fin tip heat transfer were examined by comparing results with available adiabatic tip solutions, and the Harper-Brown approximate method was also explored for transient application.

TL;DR: In this paper, the axial distribution of local mass transfer coefficient for the inner rod was measured using the electrochemical limiting diffusion current technique and results were correlated for each swirl generator, in the Reynolds number range 3300-50000.

TL;DR: In this paper, a dual reciprocity boundary element technique was used to simulate mold heat transfer in injection mold cooling system using a plate mold and the results showed that the model provided a more realistic description of mold temperature variation within the steady cyclic period than that calculated by the modified boundary element method on a cycle-averaged basis.

TL;DR: In this article, the global method of generalized differential quadrature (GDQ) was applied to simulate the natural convection in a square cavity, and numerical results demonstrated that accurate solutions can be obtained using just a few grid points and requiring much less computational effort and storage.

TL;DR: In this article, the experimental results of dynamic surface tension of aqueous lithium bromide with the presence of 2-ethyl-1-hexanol were reported, which can provide more insight into the interfacial heat and mass transfer phenomena.

TL;DR: In this article, the problem of mass transfer in a fluid flow past a wedge with a chemical reaction of the first order at the surface is investigated, and the solution of the problem is derived in a closed analytical form.

TL;DR: The planform structure of turbulent Rayleigh-B6nard convection is obtained from visualising a liquid crystal sheet stuck to the bottom hot surface as mentioned in this paper. But the model is not suitable for the observation of the periodic eruption of thermals observed by Sparrow et al.

TL;DR: In this article, the velocity and temperature profiles in a vertical water flow after a sudden change of the inlet temperature were studied, focusing on the comparison between positive and negative steps, and on their consequence concerning the wall and bulk temperatures.

TL;DR: In this paper, the polymer melt flow in injection molding process has been carried out by co-injection molding technique using alternating sequence of transparent and colored PMMA resin and simulations are also developed to predict the melt front advancements for both skin and core melts.

TL;DR: In this paper, the effect of temperature dependent viscosity on the heat transfer rate for a transient free convection in a porous medium adjacent to a vertical flat surface is studied, and it is shown that time taken to reach steady state is more for cooled wall than for heated wall.

TL;DR: In this article, a numerical simulation was carried out to solve the full three dimensional governing equations for steady simultaneously developing laminar flow and heat transfer, and the fluid was considered to be a purely viscous one which followed the power law behavior.