Convection-diffusion
Convection diffusion and reaction : bridging scales in science and engineering
... Un microréacteur est un élément essentiel en ingénierie des réactions. Il peut être trouvé dans un matériau catalytique perméable comme une géométrie idéalisée pour un pore, dans un microréacteur fabriqué, ou comme une ...
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Unified Integral Transforms Algorithm for Solving Multidimensional Nonlinear Convection-Diffusion Problems
... This article presented a unified automatic algorithm for the hybrid numerical-analytical solution of multi-dimensional convection-diffusion problems based on the Generalized Integral Transform Technique. The ...
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Three-dimensional reaction-convection-diffusion analysis with temperature influence for biodiesel synthesis in micro-reactors
... A three-dimensional nonlinear reaction-convection-diffusion model is proposed to analyze mass transfer with temperature effects, within micro-reactors of rectangular cross-section, towards the simulation of ...
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Nonlinear eigenvalue problem in the integral transforms solution of convection-diffusion with nonlinear boundary conditions
... Nonlinear diffusion and convection-diffusion problems provide the mathematical formulations of major interest for most applied research in transport ...
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The UNIT algorithm for solving one-dimensional convection-diffusion problems via integral transforms
... The next example deals with the veri fication of object oriented numerical codes for systems of convection-diffusion equations in speci fic applications. In order to simulate the transport of radio- nuclides ...
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Stabilized least squares finite element method for 2D and 3D convection-diffusion
... At Figures from 16 to 18, temperature surfaces and isotherms seen from Y = 0.5 plan are shown. None oscillations at solutions are observed. From the Figure 19, sights from Z =0.5 plan can be viewed.. In the Case 2, the ...
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Linearization technique and its application to numerical solution of bidimensional nonlinear convection diffusion equation
... In this work, a numerical scheme using Crank-Nicolson scheme and the high-order Finite Difference Method were used, respectively, for the temporal and spatial discretization of the nonlinear two-dimensional ...
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Recent advances in computational-analytical integral transforms for convection-diffusion problems
... The traditional formalism on the GITT [ 6 – 14 ] would then involve the proposition of a multiregion eigenfunction expan- sion basis for the integral transform solution of Eqs. ( 11 ), based on the so called Class II ...
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Traveling wave solutions of a biological reaction-convection-diffusion equation model by using $(G'/G)$ expansion method
... method to investigate exact traveling wave solutions of a biological model that is a reaction-convection-diffusion equation, namely Murray equation which can be considered as a generaliz[r] ...
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A coupled convection-diffusion level set model for tracking epithelial cells in colonic crypts
... the convection-diffusion and level-set equations permits to determine, almost accurately, the evolution of the region D(t) and its boundary Γ(t) in its forwarding move up to the top of the ...
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Least squares finite element method for 3D unsteady diffusion and reaction-diffusion problems
... one-directional convection- diffusion; the obtained results are compared with the analytical solution and with the finite difference streamline diffusion ...tridimensional diffusion in ...
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Two-grid Method for Characteristics Finite Volume Element of Nonlinear Convection-dominated Diffusion Equations
... property of the original problem locally. The finite vol- ume element method uses a volume integral formulation of the original problem and a finite element partition of the spatial domain to discrete the equations [18]. ...
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POLICY TRANSFER, DIFFUSION, AND CIRCULATION
... policy diffusion appears in Brazilian academic fora, our survey was inevitably narrower, as we were able to study only part, though a very important one, of the larger social science field, that here includes ...
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Substitution-diffusion based Image Cipher
... of diffusion as well as substitution process. In diffusion process, sequences of block pixels are rearranged within the block by a zigzag approach whereas block pixels are replaced with another by using ...
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Brain diffusion weighted and diffusion tensor imaging findings in an infant with biotinidase deficiency.
... Fig 1. A, Apparent diffusion coefficient (ADC) map demon- strates decreased signal intensity in the perirolandic white matter and centrum semiovalia. ADC value, measured in the left centra semiovale at the MR ...
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Word diffusion and climate science.
... database. This bears consideration as a factor (among the clear economic and other barriers) for why the social and political impact of the convincing climate evidence has been disappointing. The model is widely ...
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Diffusion of single oxidation pond
... The hy drau lic char ac ter is tic of an ox i da tion pond was stud ied by the tracer ex per i - ment, and an em pir i cal for mula of Peclet num ber was ob tained, which can be well ap [r] ...
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Phantoms for diffusion-weighted imaging and diffusion tensor imaging quality control: a review and new perspectives
... Gels whose dielectric relaxation properties have values close to those found for biological tissue have been tested as filling for isotropic diffusion phantoms. Two gels based on polysaccharide carrageenan (CAG ...
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Convection In Liquid-state Nmr: Expect The Unexpected
... of convection in a sample; here this approach is used to compare convection behavior across a range of instrumental ...The convection-compensated diffusion measurement pulse sequence of ...
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