Results 21 to 30 of about 1,876,053 (276)

Theoretical Analysis and Semianalytical Solutions for a Turbulent Buoyant Hydrogen-Air Jet

open access: yesJournal of Applied Mathematics, 2012
Semianalytical solutions are developed for turbulent hydrogen-air plume. We derived analytical expressions for plume centerline variables (radius, velocity, and density deficit) in terms of a single universal function, called plume function. By combining
M. F. El-Amin, Shuyu Sun, Amgad Salama
doaj   +1 more source

Measurement Science is the Science of Sciences - There is no Science without Measurement

open access: yesMeasurement Science Review, 2020
Omnia in mensura et numero et pondere disposuisti is a famous Latin phrase from Solomon’s Book of Wisdom, dated to the mid first century BC, meaning that all things were ordered in measure, number, and weight.
Witkovský Viktor, Frollo Ivan
doaj   +1 more source

Effects of Gravity and Inlet Location on a Two-Phase Countercurrent Imbibition in Porous Media

open access: yesInternational Journal of Chemical Engineering, 2012
We introduce a numerical investigation of the effect of gravity on the problem of two-phase countercurrent imbibition in porous media. We consider three cases of inlet location, namely, from, side, top, and bottom.
M. F. El-Amin, Amgad Salama, Shuyu Sun
doaj   +1 more source

Radiative Mixed Convection over an Isothermal Cone Embedded in a Porous Medium with Variable Permeability

open access: yesJournal of Applied Mathematics, 2011
The interaction of mixed convection with thermal radiation of an optical dense viscous fluid adjacent to an isothermal cone imbedded in a porous medium with Rosseland diffusion approximation incorporating the variation of permeability and thermal ...
M. F. El-Amin   +3 more
doaj   +1 more source

Effects of Gravity and Inlet/Outlet Location on a Two-Phase Cocurrent Imbibition in Porous Media

open access: yesJournal of Applied Mathematics, 2011
We introduce 2D numerical investigations of the problem of gravity and inlet/outlet location effects of water-oil two-phase cocurrent imbibition in a porous medium. Three different cases of side-, top-, and bottom-inlet location are considered.
M. F. El-Amin, Shuyu Sun
doaj   +1 more source

Pupils' Preconceptions about the Natural Phenomena at the Beginning of Primary Education – A Burden and/or an Opportunity

open access: yesInovacije u Nastavi, 2019
Learning about the world that surrounds a child begins well before the start of primary education. Experiential concepts, which children form in direct interaction with the environment, represent an experiential basis on which the formation of scientific
Sanja R. Blagdanić   +2 more
doaj   +1 more source

Simulating Physical Phenomena by Quantum Networks

open access: yes, 2001
Physical systems, characterized by an ensemble of interacting elementary constituents, can be represented and studied by different algebras of observables or operators.
A. Barenco   +20 more
core   +1 more source

Deterministic chaos theory and forecasting in Social Sciences. Contribution to the discussion [PDF]

open access: yes, 2018
Forecasting social phenomena may be hampered in many ways. This is because in nature of these phenomena lies strong and multilateral connection with other social phenomena; but not only – also physical and biological (natural) ones.
Donaj, Łukasz
core   +2 more sources

Apparent Surface Free Energy of Polymer/Paper Composite Material Treated by Air Plasma

open access: yesInternational Journal of Polymer Science, 2017
Surface plasma treatment consists in changes of surface properties without changing internal properties. In this paper composite polymer/paper material is used for production of packaging in cosmetic industry.
Konrad Terpiłowski
doaj   +1 more source

Improved IMPES Scheme for the Simulation of Incompressible Three-Phase Flows in Subsurface Porous Media

open access: yesEnergies, 2021
In this work, an improved IMplicit Pressure and Explicit Saturation (IMPES) scheme is proposed to solve the coupled partial differential equations to simulate the three-phase flows in subsurface porous media.
Runhong Liang   +4 more
doaj   +1 more source

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