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Journal articles on the topic 'Diabasis (Firm)'

Author: Grafiati
Published: 28 July 2024
Last updated: 31 July 2025

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1

Voinov, Nikolay Aleksandrovich, Denis Andreyevich Zemtsov, Anastasiya Viktorovna Bogatkova, and Nina Vladimirovna Deryagina. "INTENSIFICATION OF HEAT EXCHANGE IN DIABATIC RECTIFICATION COLUMNS." chemistry of plant raw material, no. 4 (December 21, 2020): 511–18. http://dx.doi.org/10.14258/jcprm.2020048580.

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The heat exchange in a diabatic column was investigated during the rectification of an ethanol-water mixture, in which partial condensation of rising vapors on the surface of vertical heat exchange tubes installed vertically along the height of the installation was carried out, as well as the evaporation of intermediate condensate on the surface of horizontal plates.
 Based on the review of diabatic columns, it is shown that they can reduce the cost of conducting the rectification process.
 Heat-exchange devices placed on trays of rectification units are considered and ways to intens
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2

Voinov, Nikolai A., Anastasiya V. Bogatkova, and Denis A. Zemtsov. "Intensification of Heat and Mass Transfer in a Diabatic Column with Vortex Trays." ChemEngineering 6, no. 2 (2022): 29. http://dx.doi.org/10.3390/chemengineering6020029.

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We used vortex contact devices that we developed and investigated to make a new design of an alcohol diabatic distillation column with heat exchange pipes (as the reflux condenser) passing through concentrating section trays. In the column, ascending vapors partially condensed on the surface of vertically installed heat exchange tubes, forming a reflux. The reflux was then mixed with the draining liquid flow in the vortex contact devices placed on the trays. Heat was removed from the column through the boiling of the draining water film along the inner surface of the heat exchange pipes. We co
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3

Martini, P., A. Schulz, H. J. Bauer, and C. F. Whitney. "Detached Eddy Simulation of Film Cooling Performance on the Trailing Edge Cutback of Gas Turbine Airfoils." Journal of Turbomachinery 128, no. 2 (2005): 292–99. http://dx.doi.org/10.1115/1.2137739.

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The present study deals with the unsteady flow simulation of trailing edge film cooling on the pressure side cut back of gas turbine airfoils. Before being ejected tangentially on the inclined cut-back surface, the coolant air passes a partly converging passage that is equipped with turbulators such as pin fins and ribs. The film mixing process on the cut back is complicated. In the near slot region, due to the turbulators and the blunt pressure side lip, turbulence is expected to be anisotropic. Furthermore, unsteady flow phenomena like vortex shedding from the pressure side lip might influen
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4

Meyer, T. "Analytical solution for combined heat and mass transfer in laminar falling film absorption with uniform film velocity - diabatic wall boundary." International Journal of Heat and Mass Transfer 80 (January 2015): 802–11. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2014.09.049.

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5

Pautsch, A. G., and T. A. Shedd. "Adiabatic and diabatic measurements of the liquid film thickness during spray cooling with FC-72." International Journal of Heat and Mass Transfer 49, no. 15-16 (2006): 2610–18. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2006.01.024.

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6

Gerendas, M., and S. Wittig. "Experimental and Numerical Investigation on the Evaporation of Shear-Driven Multicomponent Liquid Wall Films." Journal of Engineering for Gas Turbines and Power 123, no. 3 (2001): 580–88. http://dx.doi.org/10.1115/1.1362663.

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The presented work is concerned with two-phase flows similar to those in prefilming airblast atomizers and combustors employing film vaporization. Correlations for the multicomponent mixture properties and models for the calculations of the multicomponent evaporation were implemented in a well tested elliptic finite-volume code GAP-2D (S. Wittig et al., 1992, “Motion and Evaporation of Shear-Driven Liquid Films in Turbulent Gas,” ASME J. Eng. Gas Turbines Power 114, pp. 395–400) utilizing time-averaged quantities, k,ε turbulence model, wall functions, and curve-linear coordinates in the gas ph
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7

Adamsson, Carl, and Henryk Anglart. "Film flow measurements for high-pressure diabatic annular flow in tubes with various axial power distributions." Nuclear Engineering and Design 236, no. 23 (2006): 2485–93. http://dx.doi.org/10.1016/j.nucengdes.2006.03.002.

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8

Sverguzova, S. V., Zh A. Sapronova, and R. R. Valiev. "The Use of Water Treatment Petroleum Sludge in the Manufacture of Ceramic Products." Solid State Phenomena 299 (January 2020): 235–40. http://dx.doi.org/10.4028/www.scientific.net/ssp.299.235.

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The paper presents the results of studies of the possibility of utilization of petroleum sludge, obtained during the purification of oil-water emulsions, using gabbro-diabase powder in the production of ceramic building products. The sludge is proposed to add to the clay mass as an entrained additive. The influence of the sludge additive mass on such physical and mechanical indicators of ceramic samples, as density, compressive strength, water absorption, air shrinkage and fire shrinkage, and density, is studied. Ceramic samples were prepared using natural clays, deposits Bessonovka (Belgorod
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9

Michaud, Mathias, Francesco Ornano, Nafiz Chowdhury, and Thomas Povey. "Methodology for High-Accuracy Infrared Calibration in Environments with Through-Wall Heat Flux." Journal of the Global Power and Propulsion Society 4 (April 1, 2020): 1–13. http://dx.doi.org/10.33737/jgpps/118091.

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This paper describes a new method for accurate in situ infrared (IR) calibration in environments with significant through-wall heat flux and surface temperature non-uniformity. In the context of turbine research environments, conventional approaches for in situ IR calibrations rely on thermocouples embedded in the surface or bonded to the surface using an adhesive layer. A review of the literature points to lack of emphasis on the uncertainty in the calibration arising from the effect of the adhesive substrate and paint on the temperature measured by the thermocouple, namely that under diabati
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10

Voronov, G. K., A. I. Fesenko, O. V. Savvova, S. O. Melnyk, and O. P. Dehurko. "Prospects for the use of stone processing waste to obtain architectural and building ceramics." Кераміка: наука і життя, no. 4(45) (December 27, 2019): 7–13. http://dx.doi.org/10.26909/csl.4.2019.1.

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The article presents the results of a study of stone processing waste in order to justify the implementation of the technological process of manufacturing architectural and construction products with their use. The structure of the distribution of waste arising from stone processing processes is given. The analysis of the relevance of the problems of utilization of slurry waste stone processing. Studies were conducted to determine the chemical, mineralogical and phase composition of stone waste. It was found that these wastes belong to gabbro-diabase rocks, which was confirmed by their chemica
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11

Sellitto, Pasquale, Redha Belhadji, Juan Cuesta, Aurélien Podglajen, and Bernard Legras. "Radiative impacts of the Australian bushfires 2019–2020 – Part 2: Large-scale and in-vortex radiative heating." Atmospheric Chemistry and Physics 23, no. 24 (2023): 15523–35. http://dx.doi.org/10.5194/acp-23-15523-2023.

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Abstract. Record-breaking wildfires ravaged south-eastern Australia during the fire season 2019–2020. The intensity of the fires reached its paroxysmal phase at the turn of the year 2019–2020, when large pyro-cumulonimbi developed. Pyro-convective activity injected biomass burning aerosols and gases in the upper-troposphere–lower-stratosphere (UTLS), producing a long-lasting perturbation to the atmospheric composition and the stratospheric aerosol layer. The large absorptivity of the biomass burning plume produced self-lofting of the plume and thus modified its vertical dynamics and horizontal
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12

Zeh, Christopher, Ole Willers, Thomas Hagemann, Hubert Schwarze, and Jörg Seume. "Evaluation of the Rotor Temperature Distribution of an Automotive Turbocharger Under Hot Gas Conditions Including Indirect Experimental Validation." Journal of Engineering for Gas Turbines and Power 143, no. 3 (2021). http://dx.doi.org/10.1115/1.4049825.

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Abstract While turbocharging is a key technology for improving the performance and efficiency of internal combustion engines, the operating behavior of the turbocharger is highly dependent on the rotor temperature distribution as it directly modifies viscosity and clearances of the fluid film bearings. Since a direct experimental identification of the rotor temperature of an automotive turbocharger is not feasible at an acceptable expense, a combination of numerical analysis and experimental identification is applied to investigate its temperature characteristic and level. On the one hand, a n
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13

Villa, Fabio, Marco Marengo, and Joël De Coninck. "Towards a Durable Polymeric Internal Coating for Diabatic Sections in Wickless Heat Pipes." Journal of Heat Transfer 141, no. 9 (2019). http://dx.doi.org/10.1115/1.4041708.

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Heat pipe characteristics are linked to the surface properties of the diabatic surfaces, and, in the evaporator, surface properties influence both the onset boiling temperature (TONB) and the critical heat flux (CHF). In this work, the effect of surface wettability in pool boiling heat transfer is studied in order to understand if there could be a path to increment heat pipe thermal performance. This work analyzes the effects of surface wettability on boiling (tested fluid is pure water) and proposes a new super-hydrophobic polymeric coating (De Coninck et al., 2017, “Omniphobic Surface Coatin
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14

Lubis, Sandro W., Ziming Chen, Jian Lu, Samson Hagos, Chuan-Chieh Chang, and L. Ruby Leung. "Enhanced Pacific Northwest heat extremes and wildfire risks induced by the boreal summer intraseasonal oscillation." npj Climate and Atmospheric Science 7, no. 1 (2024). http://dx.doi.org/10.1038/s41612-024-00766-3.

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AbstractThe occurrence of extreme hot and dry summer conditions in the Pacific Northwest region of North America (PNW) has been known to be influenced by climate modes of variability such as the El Niño-Southern Oscillation and other variations in tropospheric circulation such as stationary waves and blocking. However, the extent to which the subseasonal remote tropical driver influences summer heat extremes and fire weather conditions across the PNW remains elusive. Our investigation reveals that the occurrence of heat extremes and associated fire-conducive weather conditions in the PNW is si
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15

Ornano, Francesco, and Thomas Povey. "Theory of Non-Dimensional Groups in Film Effectiveness Studies." Journal of Turbomachinery 142, no. 4 (2020). http://dx.doi.org/10.1115/1.4046277.

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Abstract The desire to improve gas turbines has led to a significant body of research concerning film cooling optimization. The open literature contains many studies considering the impact on film cooling performance of both geometrical factors (hole shape, hole separation, hole inclination, row separation, etc.) and physical influences (effect of density ratio (DR), momentum flux ratio, etc.). Film cooling performance (typically film effectiveness, under either adiabatic or diabatic conditions) is almost universally presented as a function of one or more of three commonly used non-dimensional
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