Πλοήγηση ανά Θέμα "Gases"
Αποτελέσματα 21-38 από 38
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A non-seismic data interpretation of gas seepage in the mesohellenic basin in Greece
(2020)Oil and gas seeps on the Earth’s surface are important in exploration since they potentially indicate the presence of hydrocarbons on the subsurface structure. They are influenced by the geological and tectonic structures ... -
Nonlinear oscillatory fully-developed rarefied gas flow in plane geometry
(2019)The nonlinear oscillatory fully developed rarefied gas flow between parallel plates due to an external harmonic force is investigated by the Direct Simulation Monte Carlo (DSMC) method in terms of the parameters characterizing ... -
Nonlinear radial oscillations of encapsulated microbubbles subject to ultrasound: The effect of membrane constitutive law
(2008)The nonlinear radial oscillations of bubbles that are encapsulated in an elastic shell are investigated numerically subject to three different constitutive laws describing the viscoelastic properties of the shell: the ... -
Optimum use of existing sensor information for gas turbine diagnostics
(2008)Gas Path Analysis, (GPA), has been proven a powerful tool for Gas Turbine fault detection and isolation. Restriction on GPA effectiveness is mainly due to limited instrumentation imposed by sensor technology and plant ... -
Oscillatory pressure-driven rarefied binary gas mixture flow between parallel plates
(2021)The rarefied, oscillatory, pressure-driven binary gas mixture flow between parallel plates is computationally investigated in terms of the mixture molar fraction and molecular mass ratio of the species, in a wide range of ... -
Polyatomic thermal creep flows through long microchannels at large temperature ratios
(2019)Rarefied polyatomic gas flows through long microchannels of circular cross section due to small temperature and pressure gradients have been studied on the basis of the Rykov model in a wide range of the gas rarefaction ... -
Pressure and temperature driven fully-developed rarefied gas flow in a channel with uniform injection/suction through its permeable walls
(2021)The pressure and temperature driven fully-developed rarefied gas flow between two parallel permeable plates, with uniform gas injection and suction from the bottom and top plates respectively, is investigated, based on the ... -
Pulsatile pressure driven rarefied gas flow in long rectangular ducts
(2018)The pulsatile pressure driven fully developed flow of a rarefied gas through an orthogonal duct is investigated, based on the time-dependent linear Bhatnagar, Gross, and Krook equation, by decomposing the flow into its ... -
Rarefied isothermal gas flow in a long circular tube due to oscillating pressure gradient
(2018)The time-dependent isothermal fully developed rarefied gas flow in a circular tube driven by harmonically oscillating pressure gradient is investigated, based on the linearized unsteady BGK kinetic model equation. The flow ... -
Reconsideration of the implicit boundary conditions in pressure driven rarefied gas flows through capillaries
(2019)The pressure driven rarefied gas flow through plane channels and tubes of various lengths is solved in a wide range of the gas rarefaction parameter by implementing the implicit boundary conditions for the incoming ... -
Results on the viscous slip coefficient for binary gas mixtures
(2008)The viscous slip coefficients for the binary gas mixtures of Ne-Ar, He-Ar and He-Xe are estimated by solving the McCormack kinetic model equation subject to Maxwell diffuse-specular scattering boundary conditions. The ... -
A simple and low-cost amperometric sensor for measuring H<inf>2</inf>, CO, and CH<inf>4</inf>
(2015)The architecture and the operational features of a simple and low-cost amperometric sensor based on 0.91 ZrO<inf>2</inf> + 0.09 Y<inf>2</inf>O<inf>3</inf> solid electrolyte, used for measuring H<inf>2</inf>, CO, and ... -
Simulation of gaseous microscale transport phenomena via kinetic theory
(2010)Kinetic theory of gases, as described by the Boltzmann or model kinetic equations, provides a solid theoretical approach for solving microscale transport phenomena in gases. Due to significant advancement in computational ... -
Steady planar Couette flow of rarefied binary gaseous mixture based on kinetic modeling
(2019)The planar Couette flow of binary gaseous mixtures is studied on the basis of the kinetic model introduced by Kosuge (2009). The calculations were carried out for a wide range of the gas rarefaction, various values of the ... -
Techno-economic assessment of gas turbine cogeneration cycles utilizing anaerobic digestion products for biogas fuel
(2017)This work presents the development of an integrated approach for the techno-economic assessment of recuperated gas turbine cycles utilizing anaerobic digestion (AD) products of animal manure and energy crops for biogas ... -
Theoretical modeling of the gas humidification effect on the characteristics of proton ceramic fuel cells
(2019)Proton ceramic fuel cells are promising electrochemical converters that produce electrical energy by oxidizing hydrogen. Understanding the impact of gas humidification on the characteristics of such fuel cells is pivotal ... -
Time-dependent conductive heat transfer in rarefied polyatomic gases confined between parallel plates
(2017)The transient conductive heat transfer through a rarefied gas confined between two infinite parallel plates due to a sudden jump in the temperature of one of the plates is investigated in the whole range of the Knudsen ... -
Uncertainty propagation analysis of the computed ITER torus effective pumping speed during the dwell phase
(2022)At the University of Thessaly the ARIADNE code for modeling complex gas distribution systems operating under any vacuum conditions has been developed by integrating a kinetic database to a typical gas network solver. The ...