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Total pressure
About: Total pressure is a research topic. Over the lifetime, 5199 publications have been published within this topic receiving 66658 citations.
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TL;DR: In this article, Extended UNIQUAC model parameters optimized for the CO 2 -MDEA-H 2 O system are presented, which accurately represents thermodynamic and thermal properties of the studied systems.
34 citations
01 May 1957
TL;DR: In this paper, the characteristics of a 40 degree cone for use in the measurement of Mach number, total pressure, and flow angles were investigated. And the cone had a total pressure orifice at the apex and four equally spaced static-pressure orifices on the surface and pressure measurements were taken at a range of angles of pitch, Mach numbers, and Reynolds numbers.
Abstract: Note presenting an experimental investigation conducted to determine the characteristics of a 40 degree cone for use in the measurement of Mach number, total pressure, and flow angles The cone had a total-pressure orifice at the apex and four equally spaced static-pressure orifices on the surface and pressure measurements were taken at a range of angles of pitch, Mach numbers, and Reynolds numbers Results regarding cone pressure distribution, determination of Mach number, determination of total pressure, and determination of flow angles are provided
34 citations
TL;DR: In this paper, the formation mechanism and step-coverage quality of SiO 2 films formed by the pyrolysis of tetraethylorthosilicate (TEOS) were studied, using a novel experimental technique called the multi-layered micro/macrocavity method.
Abstract: The formation mechanism and step-coverage quality of SiO 2 films formed by the pyrolysis of tetraethylorthosilicate (TEOS) were studied, using a novel experimental technique called the «multi-layered micro/macrocavity method.» The growth rate profiles at millimeter (macrocavity) and submicron (microtrench) sales deposited under a total pressure ranging from 2 to 760 Torr were simultaneously analyzed. The step coverage approaches conformal deposition either with decreasing volume-to-surface ratio (V/S) of the macrocavity reaction zone or with increasing total pressure. Combining these results with the growth-rate profiles of the macrocavity shows that two kinds of intermediate species participate in deposition. One is a high-activity species with a surface sticking probability near 1, and the other is a low-activity
34 citations
TL;DR: In this paper, an aerosol dynamic equation for crystallization of the natural lipid hydrogenated palm oil (HPO) in the pseudo-single phase is proposed considering that homogenous nucleation, condensation, and coagulation occur simultaneously along the nozzle.
Abstract: Particles produced from a gas-saturated solution process (PGSS) in a capillary nozzle are assumed to be in steady, 1-D, inviscid, and two-phase equilibrium homogenous flow. Fluid dynamic equations including mass, momentum and energy conservations are established to describe the mixture’s pressure, temperature, velocity and density change along the nozzle. The aerosol dynamic equation for crystallization of the natural lipid hydrogenated palm oil (HPO) in the pseudo-single phase is proposed considering that homogenous nucleation, condensation, and coagulation occur simultaneously along the nozzle. Using the Peng–Robinson equation of state for the fluid properties and phase equilibrium, the coupled model equations are numerically solved to describe the PGSS process for the CO 2 /HPO system. Axial profiles for the concentration of CO 2 in HPO, total pressure, temperature, velocities and densities of the two phases, particle size, and particle size distribution inside the nozzle have been calculated. The model also shows that HPO particles produced by rapid expansion of supercritical solutions (RESS) are about 3.5 % (in mass) of the total solid production at 18 MPa and 359 K and, therefore, can be neglected.
34 citations
TL;DR: In this paper, relative reactivities of 19 saturated acyclic and cyclic ketones were measured in the copper chromite-catalyzed hydrogenation of binary or ternary mixtures, with excess hydrogen, in the vapor phase at 185-240 °C under 20-100 bars total pressure in a continuous-flow high-pressure reactor.
34 citations