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90 articles for “state equation”
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Predictability of Equation of State (EoS)-based Gas Hydrate Models for Single and Binary Gas Mixtures
Abstract: The better models are necessary to design and understand the phase behavior of produced trapped natural gas from natural gas hydrates from subsea environments. Most of the models available in an open literature are primarily applicable at relatively low pressure condition thus making their use very limited for gas hydrate reservoir modeling. In order to produce methane from these gas hydrates, it is important to understand the phase behavior through …
Published in Journal of Petroleum Engineering & Technology · Vol. 2, Issue 1-3, 2012 · pp. 83–91 Read article
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Kantowski-Sachs Cosmological Model with Quadratic Equation of State in Gravity
Abstract: In this paper, we have investigated Kantowski-Sachs cosmological model with Quadratic Equation of State (QEoS) in the framework of Teleparallel Gravity, so called gravity, where T denotes the torsion scalar. The behavior of accelerating universe is discussed by considering Linear gravity i.e. . The solutions of field equations are obtained by using variable deceleration parameter. The physical behavior of these models has been discussed using some physical quantities. Also, the …
Published in Research & Reviews : Journal of Physics · Vol. 8, Issue 1, 2019 · pp. 83–91 Read article
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Performance of Equation-of-State for Hydrocarbon Dew Point Control in Gas Flow-line in a Nigerian Field
Abstract: Associated gas in a flow-line in a Nigerian field was suspected to be accountable for unaccounted-for gas in the flow-station. Gas molecular compositions of Low Pressure suction gas and Injection Discharge gas for operating conditions of pressure and temperature from the field were analysed by the use of Soave-Redlich Kwong and Peng-Robinson Equations of State with PVTp thermodynamic software. The phase envelope predicted the Hydrocarbon dew point(s) observable from the …
Published in Journal of Petroleum Engineering & Technology · Vol. 9, Issue 1, 2019 · pp. 7–13 Read article
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Process Control Model of a Simple Water Treatment Plant
Abstract: In everyday life we encounter many interesting but complex processes, and we want to be able to describe these processes in an understandable way. This paper presents a mathematical model for studying the process behavior of a water treatment plant. A state equation was developed as a mathematical model of the process. This mathematical model was used to simulate the effects of varying the parameters of the plant (R, C, …
Published in Trends in Mechanical Engineering & Technology · Vol. 3, Issue 2, 2013 · pp. 29–42 Read article
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Property Estimation of Polymers: A Review
Abstract: AbstractPolymer production processes are facing the problems of optimization of production rate, increasing yield, waste minimization and environmental issues and product quality problems. These issues can be solved by designing efficient polymer manufacturing processes. Accurate properties of polymers are very important in designing efficient processes. Hundreds of property estimation methods are available for property estimation of polymers but the selection of the suitable property model is a challenging task. One …
Published in Journal of Polymer & Composites · Vol. 6, Issue 3, 2018 · pp. 14–24 Read article
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A Comparative Study of Elastic Parameters in LiBC
Abstract: The elastic constants for LiBC using higher order Eulerian strain equation of state accordance with method of augmented plane wave under various temperature and pressure have been explored. In present study, we employed Hama-Suito theory of equation of state. The constants C11, C12, C44 and temperature dependent of bulk modulus have been calculated up to high temperature and low compressions. The relation among pressure, volume and temperature have also been …
Published in Journal of Materials & Metallurgical Engineering · Vol. 13, Issue 1, 2023 · pp. 34–39 Read article
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Rail and Coil Gun Based Levitating Hybrid Train
Abstract: Hybrid train is a train which is a hybrid of the concept ideas of coil gun, rail gun, halback array, magnetic levitation etc. Theoretically this train could achieve the fastest Speed an object could reach respect to its mass. This train could surpass sound barrier and could even be made to go to speed exceeding mach 3. But due to travel safety a certain speed limit can be implemented in …
Published in Trends in Electrical Engineering Read article
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Analysis of a New Approach to Admission Call Control
Abstract: This study presents a new method of managing call admission in wireless networks using a resource reservation technique. The system under study comprises a defined number of operating devices, standby units, and technicians assigned to repair failed devices. In this method, the failure and repair of devices are assumed to follow an exponential distribution. Whenever a device fails, a standby unit replaces it to maintain seamless functionality, and the failed …
Published in International Journal of Mobile Computing Technology · Vol. 3, Issue 2, 2025 · pp. 01–06 Read article
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Rail and Coil gun Based Levitating hybrid Train
Abstract: Hybrid train is a train which is a hybrid of the concept ideas of coil gun, rail gun, halback array, magnetic levitation etc. Theoretically this train could achieve the fastest Speed an object could reach respect to its mass. This train could surpass sound barrier and could even be made to go to speed exceeding mach 3. But due to travel safety a certain speed limit can be implemented in …
Published in Trends in Electrical Engineering · Vol. 11, Issue 2, 2021 · pp. 35–41 Read article
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Unified Mass–Energy Dissolution Cosmology (UMEDC): A Staged Framework for Cosmic Energy Transformation and Late-Time Acceleration
Abstract: The ΛCDM model successfully describes the universe’s expansion but remains fundamentally descriptive: it assigns fixed densities to matter, dark matter, and dark energy without providing a unifying physical mechanism behind their coexistence or evolution. In this work, we introduce the Unified Mass–Energy Dissolution Cosmology (UMEDC), a novel framework based on the staged transformation M → DM → DE, where ordinary matter gradually dissolves into a dark-matter-like reservoir, which subsequently transforms …
Published in International Journal of Universe · Vol. 1, Issue 2, 2025 · pp. 18–34 Read article
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Kaniadakis Holographic Dark Energy by Using Hybrid Scale Factor
Abstract: We carry out the work on Kaniadakis holographic dark energy KHDE with hybrid expansion law by taking the scale factor containing both exponent and exponential form. Therby revealing the present state of accelerating and expanding universe in the flat Friedmann-Robertson-Walber universe. The deceleration parameter q portrays whether he universe is decelerating or accererating. q greater than zero suggests the universe is slowing down or getting decelerated and q less than …
Published in Journal of Polymer & Composites · Vol. 11, Issue 7, 2023 · pp. 30–38 Read article
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PVT Analysis: Validity Checks and EOS Turning Techniques for Retrograde Condensate Reservoirs
Abstract: PVT analysis is pertinent to field-wide development and optimization. This is because we need to know the over-all behavior of the fluid from reservoir through production and process facilities, down to the refinery. Its emergence as a separate discipline has been supported by the development of modern computer software that utilize EOS models for simulating experiments and representing fluid phase behaviours. PVT simulations are carried out to determine operating conditions …
Published in Journal of Petroleum Engineering & Technology · Vol. 7, Issue 2, 2017 · pp. 44–53 Read article
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Developing a Model in Matlab/Simulink Environment for Induction Motor Considering Core Loss and Stray Load Loss
Abstract: This paper focuses on a Matlab/Simulink model of a squirrel-cage induction motor with consideration of core loss and stray load loss. This model is based on some mathematical expressions and also described through an equivalent circuit including core loss and stray load loss. The model of induction motor has been developed based on the state space equations in a synchronously rotating reference frame, where core loss and stray load losses …
Published in Trends in Electrical Engineering · Vol. 4, Issue 2, 2014 · pp. 1–12 Read article
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CFD Analysis of NACA 2412 and NACA 2412 with Passage for Lift Augmentation
Abstract: Computational Fluid Dynamics (CFD) analysis of a three dimensional (3-D) National Advisory Committee for Aeronautics (NACA) 2412 airfoil was compared with same dimensional 3-D NACA 2412 with internal passage. The computational domain was composed of 2109509 elements for NACA 2412 and 2258962 elements for NACA 2412 with internal passage. Calculations were done for various Mach numbers by varying the angle of attack constant for above mentioned turbulence model. The flow …
Published in Journal of Aerospace Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 1–7 Read article
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PVT Properties of Alternate PUREX diluent 4,4-Dipropyl Heptane
Abstract: 4,4-Dipropyl Heptane (Hydrogenated propylene tetramer) is an alternate diluent for PUREX process, employed for reprocessing of spent nuclear fuel. Its PVT properties are not available in literature. With group contribution method, PVT properties of 4,4-dipropyl heptane were estimated and reported in this work. A corresponding- states based equation as well as Wagner constants were also reported in the range of 273.15K to critical temperature. Keywords: PVT properties, 4, 4-dipropyl heptane, …
Published in Journal of Nuclear Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 20–23 Read article
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Ferromagnetic Resonance in II-VI Diluted Magnetic Semiconductor, ZnxTM1-xO Nanostructures
Abstract: The ferromagnetic resonance in II-VI diluted magnetic semiconductor Zn1 xMnxO was studied theoretically. The model employed to manipulate the Hamiltonian of the system which is the Heisenberg Model. By considering a cloud of electron gas and employing equation of state, the fractions of demagnetization factors was determined. For FMR probes, the sample magnetization results from the magnetic moments of dipolar-coupled but unpaired electrons. The resulting frequency versus magnetization curve is …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 24, Issue 1, 2022 · pp. 1–16 Read article
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Pressure Dependence of Isothermal Anderson Gruneisen Parameter of NaCl
Abstract: AbstractVarious models have been developed for determination of isothermal Anderson Gruneisen parameter of NaCl at room temperature and different pressures. In present work, a new model is developed by modification of existing EOS (equation of state) to study the temperature and pressure dependence of isothermal Anderson Gruneisen parameter of NaCl. The results obtained with the present model are in quite close agreement to the experimental values. Comparison of the obtained …
Published in Research & Reviews : Journal of Physics · Vol. 6, Issue 3, 2017 · pp. 7–9 Read article
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Pressure-Dependent Structural and Optical Properties of CdSe
Abstract: AbstractThe structural and optical properties of Cadmium Selenide (CdSe) compound is investigated in zinc blende phases under 0–30 GPa pressure using Density Functional Theory (DFT) with generalized gradient approximation (GGA) functional embodied in Wien2k code. At zero pressure, lattice constant and bulk modulus are found to be in good agreement with experimental and other theoretical works. Other than zero pressure, there is reduction in volume of unit cell according to …
Published in Research & Reviews : Journal of Physics · Vol. 5, Issue 1, 2016 · pp. 1–5 Read article
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Structural and Optical Properties of ZnSe under Pressure
Abstract: AbstractThe structural and optical properties of zinc selenide compound is investigated in zinc blende phases under 0-30 GPa pressure using density functional theory (DFT) calculations with generalized gradient approximation (GGA) embodied in Wien2k code. At zero pressure, lattice constant and bulk modulus are found to be in good agreement with experimental and other theoretical works. Other than zero pressure, there is a reduction in volume of the unit cell according …
Published in Research & Reviews : Journal of Physics · Vol. 5, Issue 1, 2016 · pp. 6–10 Read article
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Numerical Formulation of Solidification of Aluminum Casting in 2-D Green Sand Mould
Abstract: Unsteady numerical simulation of steady state and unsteady state conduction heat transfer has been done for solidification of pure Aluminium in green sand mould. As during the solidification heat transfer by conduction will dominate over convection and radiation. Heat conduction equation in two-dimensional Cartesian co-ordinate governs the problem. Convective boundary condition has been considered at the interface of the casting part and mould cavity. Heat conduction equation in unsteady state …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 3, 2015 · pp. 38–41 Read article