Showing papers in "Experimental Thermal and Fluid Science in 2000"

TL;DR: In this article, the authors analyze the effects of turbulent combustion on intermediate steady propagation (ISP) flames and derive formulas for the thickened and strongly wrinkled flamelet mechanism, which are used for the closure of the combustion equation.

TL;DR: In this article, the authors focus on the data reduction method to obtain the air-side performance of fin-and-tube heat exchangers and propose a standard procedure for dry surface heat transfer.

TL;DR: In this paper, a combined digital particle image velocimetry (DPIV) and planar laser induced fluorescence (PLIF) approach was developed to measure both the time mean and turbulent mass transport in mixing processes.

TL;DR: In this article, the interaction of propagating premixed flames with various solid obstructing bodies was investigated to quantify the role of generated turbulence in flame acceleration and structure, and the volume of trapped unburned mixture was found to increase with increasing area blockage ratio.

TL;DR: In this article, particle tracking velocimetry (PTV) and image processing for burner-stabilized flames in a high-pressure chamber were performed. And the experimental and numerical results agreed reasonably well with each other for mixtures of equivalence ratios of 1.0 and 2.0.

TL;DR: In this article, a transient method was used to measure thermal resistivity of different soils for a state of compaction, and generalised relationships were developed, for predicting soil thermal resistivities.

TL;DR: In this paper, experimental results about the vaporization of rapeseed and sunflower oil methyl ester droplets at high temperatures are presented. And the time evolution of droplet diameter during vaporization is observed by imaging technique and average and instantaneous vaporization rates have been estimated from the d 2 -curves at temperatures between 473 and 1020 K and at atmospheric pressure.

TL;DR: In this article, the Reynolds-averaged turbulence characteristics of iso-thermal flow in a rectangular channel containing a cylindrical rod such that it forms a narrow gap with a plane channel wall were presented.

TL;DR: In this article, the adsorption and desorption of elemental mercuric on HGR activated carbon produced by Calgon-Carbon Corp. was investigated in an apparatus at laboratory scale in which Hg 0 vapors in a nitrogen gas stream, at a given temperature and mercury concentration, flowed through a fixed bed of adsorbent material.

TL;DR: In this paper, total hemispherical emissivities were measured for Inconel 718 as a function of sample temperature, and measurements were made for both unoxidized and oxidized samples.

TL;DR: In this article, the authors studied the coalescence phenomenon during pool boiling on a duraluminium (AU4G) vertical heated wall and found that the coalescability of bubbles growing on three artificial nucleation sites results in higher heat transfer coefficients than single-site boiling.

TL;DR: In this article, a numerical model for co-flowing diffusion methane/air flames and candle-type flames under the electric field effect has been developed to explain the experimental observations, which considers the more important physical and chemical phenomena associated with the flame-field interaction process.

TL;DR: In this article, the authors investigated the effects of the inlet coolant temperature and coolant flow rate on nucleation of capsules, heat transfer and pressure drop of the tank.

TL;DR: In this paper, a technique to determine the thermal boundary conditions existing during the solidification of metallic alloys in the investment casting process is presented, and the resultant heat transfer coefficient for the alloy/mould interface is calculated.

TL;DR: In this article, the authors used infrared (IR) thermography to obtain surface flow visualisation, as well as local and spanwise averaged heat transfer measurements near a 180° sharp turn in a rectangular channel.

TL;DR: In this paper, the authors applied a petal nozzle to enhance the performance of a steam-jet refrigeration system and investigated the behavior and characteristics of the petal-filled ejector under various operating conditions.

TL;DR: In this paper, an experimental study has been made of the control of vortex shedding in the wake of two two-dimensional bluff bodies, a circular cylinder and a flat ribbon, and it has shown that this control, easily realized by heating the bluff body, depends on the nature of the fluid.

TL;DR: In this paper, the effect of fluid properties and forced flow rate on the onset of electrohydrodynamic (EHD) heat transfer enhancement was investigated using three cooling oils having widely varying physical properties.

TL;DR: In this paper, the local heat transfer coefficients for isothermal and uniform heat flux boundary conditions for a planar wall jet have been determined experimentally for automotive windshield defogging/defrosting.

TL;DR: In this paper, an experimental program was conducted to investigate the flow mixing behavior inside the slots of seven jets with a jet-to-jet spacing of five diameters and velocity ratio of unity.

TL;DR: An experimental study of convective boiling of refrigerants R-22, R-134a and R-404A in a 12.7 mm internal diameter, 2 m long, horizontal copper tube has been performed as mentioned in this paper.

TL;DR: In this paper, heat transfer measurements are presented for both the straight and tapered square channels including the turn region with and without rib turbulators, and the results show that heat transfer in tapered smooth channels is enhanced significantly due to flow acceleration in the first pass, a combination of taper and turn and flow deceleration in the second pass.

TL;DR: In this paper, a new turbulent flow system was proposed for the study of premixed turbulent combustion processes, which consists of two cylindrical vessels and perforated plates at each end.

TL;DR: In this paper, a four-hole pressure probe, known as a cobra probe, was used for turbulence measurement in pipe flow and the results showed good agreement with established data for fully developed pipe flow.

TL;DR: In this article, the characteristics of the flow in a low-speed axial fan were investigated using digital particle image velocimetry (DPIV) Instantaneous and time-averaged velocity measurements were made at the leading edge, trailing edge, and suction and pressure sides of the blade by synchronizing the passage of the fan with the laser and camera system.

TL;DR: In this article, a lean premixed propane/air turbulent flame stabilized by a bluff body is modeled by a laminar flamelet library approach, which has been successfully used for modeling of nonpremixed turbulent flames, and applied to premixed combustion.

TL;DR: In this paper, the role of particle diameter in the heat transfer of a gas-solid suspension to the walls of a circulating fluidized bed was studied for particles of uniform size.

TL;DR: In this article, the performance analysis of an annular diffuser with and without struts is presented, in order to determine the total and static pressure development and the effect of struts on both the local phenomena and overall performance.

TL;DR: In this article, the authors present experimental data for R-113 pool boiling, at atmospheric pressure and moderate heat flux, inside vertical and horizontal aluminum open-ended tubes, whose internal surfaces are either smooth or grooved.

TL;DR: In this paper, a comparison of results obtained during the numerical modelling studies applying the k, e -, low Reynolds-number k, e - and the Reynolds-stress turbulence model on different grids with detailed experimental data shows a good correspondence both for isothermal conditions as well as during combustion.