Bibliographies thématiques / Reaction-convection-diffusion equations / Articles de revues

Articles de revues sur le sujet « Reaction-convection-diffusion equations »

Pour voir les autres types de publications sur ce sujet consultez le lien suivant : Reaction-convection-diffusion equations.
Auteur : Grafiati
Publié le 14 mars 2023

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres

Choisissez une source :

Consultez les 50 meilleurs articles de revues pour votre recherche sur le sujet « Reaction-convection-diffusion equations ».

À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.

Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.

Parcourez les articles de revues sur diverses disciplines et organisez correctement votre bibliographie.

1

El-Wakil, S. A., A. Elhanbaly et M. A. Abdou. « On the Diffusion-Convection-Reaction Equations ». Physica Scripta 60, no 3 (1 septembre 1999) : 207–10. http://dx.doi.org/10.1238/physica.regular.060a00207.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
2

de Pablo, Arturo, et Ariel Sánchez. « Global Travelling Waves in Reaction–Convection–Diffusion Equations ». Journal of Differential Equations 165, no 2 (août 2000) : 377–413. http://dx.doi.org/10.1006/jdeq.2000.3781.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
3

Iliescu, Traian, et Zhu Wang. « Variational multiscale proper orthogonal decomposition : Convection-dominated convection-diffusion-reaction equations ». Mathematics of Computation 82, no 283 (18 mars 2013) : 1357–78. http://dx.doi.org/10.1090/s0025-5718-2013-02683-x.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
4

Giere, Swetlana, Traian Iliescu, Volker John et David Wells. « SUPG reduced order models for convection-dominated convection–diffusion–reaction equations ». Computer Methods in Applied Mechanics and Engineering 289 (juin 2015) : 454–74. http://dx.doi.org/10.1016/j.cma.2015.01.020.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
5

Choudhury, A. H. « Wavelet Method for Numerical Solution of Parabolic Equations ». Journal of Computational Engineering 2014 (27 février 2014) : 1–12. http://dx.doi.org/10.1155/2014/346731.

Texte intégral
Résumé :
We derive a highly accurate numerical method for the solution of parabolic partial differential equations in one space dimension using semidiscrete approximations. The space direction is discretized by wavelet-Galerkin method using some special types of basis functions obtained by integrating Daubechies functions which are compactly supported and differentiable. The time variable is discretized by using various classical finite difference schemes. Theoretical and numerical results are obtained for problems of diffusion, diffusion-reaction, convection-diffusion, and convection-diffusion-reaction with Dirichlet, mixed, and Neumann boundary conditions. The computed solutions are highly favourable as compared to the exact solutions.
Styles APA, Harvard, Vancouver, ISO, etc.
6

Phongthanapanich, Sutthisak, et Pramote Dechaumphai. « A CHARACTERISTIC-BASED FINITE VOLUME ELEMENT METHOD FOR CONVECTION-DIFFUSION-REACTION EQUATION ». Transactions of the Canadian Society for Mechanical Engineering 32, no 3-4 (septembre 2008) : 549–60. http://dx.doi.org/10.1139/tcsme-2008-0037.

Texte intégral
Résumé :
A two-dimensional convection-diffusion-reaction equation is discretized by the finite volume element method on triangular meshes. Time-dependent convection-diffusion-reaction equation is developed along the characteristic path using the characteristic-based scheme, while the finite volume method is employed for deriving the discretized equations. The concept of the finite element technique is applied to estimate the gradient quantities at the cell faces of the finite volume. Numerical test cases have shown that the method does not require any artificial diffusion to improve the solution stability. The robustness and the accuracy of the method have been evaluated by using available analytical and numerical solutions of the pure-convection, convection-diffusion and convection-diffusion-reaction problems.
Styles APA, Harvard, Vancouver, ISO, etc.
7

Lu, Yunguang, et Willi Jäger. « On Solutions to Nonlinear Reaction–Diffusion–Convection Equations with Degenerate Diffusion ». Journal of Differential Equations 170, no 1 (février 2001) : 1–21. http://dx.doi.org/10.1006/jdeq.2000.3800.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
8

Ei, Shin-Ichiro. « The effect of nonlocal convection on reaction-diffusion equations ». Hiroshima Mathematical Journal 17, no 2 (1987) : 281–307. http://dx.doi.org/10.32917/hmj/1206130067.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
9

Geiser, Jürgen, Jose L. Hueso et Eulalia Martínez. « Adaptive Iterative Splitting Methods for Convection-Diffusion-Reaction Equations ». Mathematics 8, no 3 (25 février 2020) : 302. http://dx.doi.org/10.3390/math8030302.

Texte intégral
Résumé :
This article proposes adaptive iterative splitting methods to solve Multiphysics problems, which are related to convection–diffusion–reaction equations. The splitting techniques are based on iterative splitting approaches with adaptive ideas. Based on shifting the time-steps with additional adaptive time-ranges, we could embedded the adaptive techniques into the splitting approach. The numerical analysis of the adapted iterative splitting schemes is considered and we develop the underlying error estimates for the application of the adaptive schemes. The performance of the method with respect to the accuracy and the acceleration is evaluated in different numerical experiments. We test the benefits of the adaptive splitting approach on highly nonlinear Burgers’ and Maxwell–Stefan diffusion equations.
Styles APA, Harvard, Vancouver, ISO, etc.
10

Sarrico, C. O. R. « New singular travelling waves for convection–diffusion–reaction equations ». Journal of Physics A : Mathematical and Theoretical 53, no 15 (26 mars 2020) : 155202. http://dx.doi.org/10.1088/1751-8121/ab7c1d.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
11

RODRIGO, M., et M. MIMURA. « ON SOME CLASSES OF LINEARIZABLE REACTION-CONVECTION-DIFFUSION EQUATIONS ». Analysis and Applications 02, no 01 (janvier 2004) : 11–19. http://dx.doi.org/10.1142/s0219530504000266.

Texte intégral
Résumé :
In this paper, we consider the class of equations ut=[F(x,u)ux+G(x,u)]x+H(x,u). Using hodograph and dependent variable transformations, we determine sufficient conditions on F, G, and H such that this equation is linearizable. We also derive a general quasilinear equation, which includes the Clarkson–Fokas–Ablowitz equation (SIAM J. Appl. Math.49 (1989), 1188–1209), that can be transformed into semilinear form.
Styles APA, Harvard, Vancouver, ISO, etc.
12

Kennedy, Christopher A., et Mark H. Carpenter. « Additive Runge–Kutta schemes for convection–diffusion–reaction equations ». Applied Numerical Mathematics 44, no 1-2 (janvier 2003) : 139–81. http://dx.doi.org/10.1016/s0168-9274(02)00138-1.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
13

Lou, Bendong. « Singular Limits of Spatially Inhomogeneous Convection-reaction-diffusion Equations ». Journal of Statistical Physics 129, no 3 (13 septembre 2007) : 509–16. http://dx.doi.org/10.1007/s10955-007-9400-3.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
14

Indekeu, Joseph O., et Ruben Smets. « Traveling wavefront solutions to nonlinear reaction-diffusion-convection equations ». Journal of Physics A : Mathematical and Theoretical 50, no 31 (6 juillet 2017) : 315601. http://dx.doi.org/10.1088/1751-8121/aa7a93.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
15

Hernández, H., T. J. Massart, R. H. J. Peerlings et M. G. D. Geers. « A stabilization technique for coupled convection-diffusion-reaction equations ». International Journal for Numerical Methods in Engineering 116, no 1 (25 juillet 2018) : 43–65. http://dx.doi.org/10.1002/nme.5914.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
16

O' Riordan, Eugene, Maria L. Pickett et Georgii I. Shishkin. « Singularly Perturbed Problems Modeling Reaction-convection-diffusion Processes ». Computational Methods in Applied Mathematics 3, no 3 (2003) : 424–42. http://dx.doi.org/10.2478/cmam-2003-0028.

Texte intégral
Résumé :
AbstractIn this paper, parameter - uniform numerical methods for singularly perturbed ordinary differential equations containing two small parameters are studied.Parameter-explicit theoretical bounds on the derivatives of the solutions are derived. A numerical algorithm based on an upwind finite difference operator and an appropriate piecewise uniform mesh is constructed. Parameter-uniform error bounds for the numerical approximations are established. Numerical results are given to illustrate the parameter-uniform convergence of numerical approximations.
Styles APA, Harvard, Vancouver, ISO, etc.
17

ZHANG, WEN. « DIFFUSIVE EFFECTS ON A CATALYTIC SURFACE REACTION : AN INITIAL BOUNDARY VALUE PROBLEM IN REACTION-DIFFUSION-CONVECTION EQUATIONS ». International Journal of Bifurcation and Chaos 03, no 01 (février 1993) : 79–95. http://dx.doi.org/10.1142/s0218127493000052.

Texte intégral
Résumé :
A bimolecular catalytic surface reaction is extended to include diffusion which yields mobilized coverage on the surface. We consider the reaction occurring in a tubular reactor with a convection flow where the reactants also diffuse. An initial boundary value problem in one-dimensional reaction-diffusion-convection equations is used in describing the model. We combine singular perturbation analysis with numerical simulations in studying the solution behavior in parameter space. We track the reaction front and the cause of period-2 oscillations. Compared with the case of having no surface diffusion, we observe regular oscillations instead of irregular oscillations. Compared with the nondiffusive nonconvective model, we obtain rich spatiotemporal patterns including stationary, oscillatory reaction fronts and multiple steady states.
Styles APA, Harvard, Vancouver, ISO, etc.
18

Berti, Diego, Andrea Corli et Luisa Malaguti. « Diffusion–convection reaction equations with sign-changing diffusivity and bistable reaction term ». Nonlinear Analysis : Real World Applications 67 (octobre 2022) : 103579. http://dx.doi.org/10.1016/j.nonrwa.2022.103579.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
19

Corli, Andrea, Luisa Malaguti et Elisa Sovrano. « Wavefront solutions to reaction-convection equations with Perona-Malik diffusion ». Journal of Differential Equations 308 (janvier 2022) : 474–506. http://dx.doi.org/10.1016/j.jde.2021.09.041.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
20

Zhong, Liuqiang, Yue Xuan et Jintao Cui. « Two-grid discontinuous Galerkin method for convection–diffusion–reaction equations ». Journal of Computational and Applied Mathematics 404 (avril 2022) : 113903. http://dx.doi.org/10.1016/j.cam.2021.113903.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
21

Seymen, Zahire, et Bülent Karasözen. « Optimal boundary control for time-dependent diffusion-convection-reaction equations ». International Journal of Mathematical Modelling and Numerical Optimisation 4, no 3 (2013) : 282. http://dx.doi.org/10.1504/ijmmno.2013.056543.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
22

Simon, K., et L. Tobiska. « Local projection stabilization for convection–diffusion–reaction equations on surfaces ». Computer Methods in Applied Mechanics and Engineering 344 (février 2019) : 34–53. http://dx.doi.org/10.1016/j.cma.2018.09.031.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
23

Liu, Qingfang, Yanren Hou, Lei Ding et Qingchang Liu. « A Stabilized Galerkin Scheme for the Convection-Diffusion-Reaction Equations ». Acta Applicandae Mathematicae 130, no 1 (23 août 2013) : 115–34. http://dx.doi.org/10.1007/s10440-013-9840-5.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
24

Kaya, Adem. « Finite difference approximations of multidimensional unsteady convection–diffusion–reaction equations ». Journal of Computational Physics 285 (mars 2015) : 331–49. http://dx.doi.org/10.1016/j.jcp.2015.01.024.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
25

Serov, M. I., T. O. Karpaliuk, O. G. Pliukhin et I. V. Rassokha. « Systems of reaction–convection–diffusion equations invariant under Galilean algebras ». Journal of Mathematical Analysis and Applications 422, no 1 (février 2015) : 185–211. http://dx.doi.org/10.1016/j.jmaa.2014.08.018.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
26

El-Wakil, S. A., M. A. Abdou et A. Elhanbaly. « Adomian decomposition method for solving the diffusion–convection–reaction equations ». Applied Mathematics and Computation 177, no 2 (juin 2006) : 729–36. http://dx.doi.org/10.1016/j.amc.2005.09.105.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
27

Hai, Doan Duy, et Atsushi Yagi. « Rosenbrock strong stability-preserving methods for convection–diffusion–reaction equations ». Japan Journal of Industrial and Applied Mathematics 31, no 2 (15 mai 2014) : 401–17. http://dx.doi.org/10.1007/s13160-014-0143-7.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
28

Kaya, A. « A finite difference scheme for multidimensional convection–diffusion–reaction equations ». Computer Methods in Applied Mechanics and Engineering 278 (août 2014) : 347–60. http://dx.doi.org/10.1016/j.cma.2014.06.002.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
29

Hou, Qingzhi, Jiaru Liu, Jijian Lian et Wenhuan Lu. « A Lagrangian Particle Algorithm (SPH) for an Autocatalytic Reaction Model with Multicomponent Reactants ». Processes 7, no 7 (3 juillet 2019) : 421. http://dx.doi.org/10.3390/pr7070421.

Texte intégral
Résumé :
For the numerical simulation of convection-dominated reacting flow problems governed by convection-reaction equations, grids-based Eulerian methods may cause different degrees of either numerical dissipation or unphysical oscillations. In this paper, a Lagrangian particle algorithm based on the smoothed particle hydrodynamics (SPH) method is proposed for convection-reaction equations and is applied to an autocatalytic reaction model with multicomponent reactants. Four typical Eulerian methods are also presented for comparison, including the high-resolution technique with the Superbee flux limiter, which has been considered to be the most appropriate technique for solving convection-reaction equations. Numerical results demonstrated that when comparing with traditional first- and second-order schemes and the high-resolution technique, the present Lagrangian particle algorithm has better numerical accuracy. It can correctly track the moving steep fronts without suffering from numerical diffusion and spurious oscillations.
Styles APA, Harvard, Vancouver, ISO, etc.
30

Pavelchuk, Anna Vladimirovna, et Anna Gennadievna Maslovskaya. « MODIFIED FINITE-DIFFERENCE SCHEME FOR SOLVING ONE CLASS OF CONVECTION-REACTION-DIFFUSION PROBLEMS ». Messenger AmSU, no 93 (2021) : 7–14. http://dx.doi.org/10.22250/jasu.93.2.

Texte intégral
Résumé :
The paper reviews approaches to the construction of finite-difference methods for solving time-dependent diffusion equations and transport equations. A modified computational scheme for solving a semilinear multidimensional equation of the «reaction – diffusion – convection» type is presented. The hybrid computational scheme is based on the alternating directions method and the Robert-Weiss scheme.
Styles APA, Harvard, Vancouver, ISO, etc.
31

Junk, Michael, et Zhaoxia Yang. « L2Convergence of the Lattice Boltzmann Method for One Dimensional Convection-Diffusion-Reaction Equations ». Communications in Computational Physics 17, no 5 (mai 2015) : 1225–45. http://dx.doi.org/10.4208/cicp.2014.m369.

Texte intégral
Résumé :
AbstractCombining asymptotic analysis and weightedL2stability estimates, the convergence of lattice Boltzmann methods for the approximation of 1D convection-diffusion-reaction equations is proved. Unlike previous approaches, the proof does not require transformations to equivalent macroscopic equations.
Styles APA, Harvard, Vancouver, ISO, etc.
32

John, Volker, et Ellen Schmeyer. « Finite element methods for time-dependent convection–diffusion–reaction equations with small diffusion ». Computer Methods in Applied Mechanics and Engineering 198, no 3-4 (décembre 2008) : 475–94. http://dx.doi.org/10.1016/j.cma.2008.08.016.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
33

CARETA, A., F. SAGUÉS et J. M. SANCHO. « DYNAMICS OF REACTION-DIFFUSION INTERFACES UNDER STOCHASTIC CONVECTION : PRELIMINARY RESULTS ». International Journal of Bifurcation and Chaos 04, no 05 (octobre 1994) : 1329–31. http://dx.doi.org/10.1142/s0218127494001015.

Texte intégral
Résumé :
Some preliminary results to illustrate the effect of turbulent convection on the dynamics of physicochemical systems incorporating reaction, diffusion and convection of chemical species are given. The whole approach rests on the use of stochastic differential equations with spatiotemporal correlated noise. In particular, it is shown how the propagation velocity of a chemically reacting front can be enhanced due to the fluid motion.
Styles APA, Harvard, Vancouver, ISO, etc.
34

Zheng, Si Ning. « Weakly invariant regions for reaction—diffusion systems and applications ». Proceedings of the Royal Society of Edinburgh : Section A Mathematics 130, no 5 (octobre 2000) : 1165–80. http://dx.doi.org/10.1017/s0308210500000627.

Texte intégral
Résumé :
The important theory of invariant regions in reaction-diffusion equations has only restricted applications because of its strict requirements on both the reaction terms and the regions. The concept of weakly invariant regions was introduced by us to admit wider reaction-diffusion systems. In this paper we first extend the L∞ estimate technique of semilinear parabolic equations of Rothe to the more general case with convection terms, and then propose more precise criteria for the bounded weakly invariant regions. We illustrate, by three model examples, that they are very convenient for establishing the global existence of solutions for reaction-diffusion systems, especially those from ecology and chemical processes.
Styles APA, Harvard, Vancouver, ISO, etc.
35

Carstea, A. S. « Reaction–diffusion–convection equations in two spatial dimensions ; continuous and discrete dynamics ». Modern Physics Letters B 35, no 10 (18 février 2021) : 2150186. http://dx.doi.org/10.1142/s0217984921501864.

Texte intégral
Résumé :
In this paper, we investigate some two-dimensional (with respect to spatial independent variables) reaction–diffusion–convection equations with various nonlinear (reaction) terms. Using Hirota bilinear formalism with a free auxiliary function, we obtain kink solutions and many spatio-temporal discretizations having birational form.
Styles APA, Harvard, Vancouver, ISO, etc.
36

Abdulle, Assyr, et Giacomo Rosilho de Souza. « A local adaptive discontinuous Galerkin method for convection-diffusion-reaction equations ». Journal of Computational Physics 451 (février 2022) : 110894. http://dx.doi.org/10.1016/j.jcp.2021.110894.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
37

Berti, Diego, Andrea Corli et Luisa Malaguti. « Uniqueness and nonuniqueness of fronts for degenerate diffusion-convection reaction equations ». Electronic Journal of Qualitative Theory of Differential Equations, no 66 (2020) : 1–34. http://dx.doi.org/10.14232/ejqtde.2020.1.66.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
38

Liu, Bochao, et Chengjian Zhang. « A spectral Galerkin method for nonlinear delay convection–diffusion–reaction equations ». Computers & ; Mathematics with Applications 69, no 8 (avril 2015) : 709–24. http://dx.doi.org/10.1016/j.camwa.2015.02.027.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
39

Cherniha, Roman, Mykola Serov et Inna Rassokha. « Lie symmetries and form-preserving transformations of reaction–diffusion–convection equations ». Journal of Mathematical Analysis and Applications 342, no 2 (juin 2008) : 1363–79. http://dx.doi.org/10.1016/j.jmaa.2008.01.011.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
40

Serov, Mykola I., et Inna V. Rassokha. « Galilei’s relativity principle for a system of reaction-convection-diffusion equations ». Journal of Mathematical Sciences 194, no 5 (28 septembre 2013) : 539–56. http://dx.doi.org/10.1007/s10958-013-1549-5.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
41

Bobisud, L. E., D. O'Regan et W. D. Royalty. « Steady-state reaction-diffusion-convection equations : dead cores and singular perturbations ». Nonlinear Analysis : Theory, Methods & ; Applications 11, no 4 (janvier 1987) : 527–38. http://dx.doi.org/10.1016/0362-546x(87)90069-1.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
42

Tezduyar, T. E., et Y. J. Park. « Discontinuity-capturing finite element formulations for nonlinear convection-diffusion-reaction equations ». Computer Methods in Applied Mechanics and Engineering 59, no 3 (décembre 1986) : 307–25. http://dx.doi.org/10.1016/0045-7825(86)90003-4.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
43

Sun, Xiaodi, et Michael J. Ward. « Metastability and pinning for convection-diffusion-reaction equations in thin domains ». Methods and Applications of Analysis 6, no 4 (1999) : 451–76. http://dx.doi.org/10.4310/maa.1999.v6.n4.a3.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
44

Hernández, H., T. J. Massart, R. H. J. Peerlings et M. G. D. Geers. « Stabilization of coupled convection–diffusion-reaction equations for continuum dislocation transport ». Modelling and Simulation in Materials Science and Engineering 27, no 5 (16 mai 2019) : 055009. http://dx.doi.org/10.1088/1361-651x/ab1b84.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
45

Uzunca, Murat, Bülent Karasözen et Murat Manguoğlu. « Adaptive discontinuous Galerkin methods for non-linear diffusion–convection–reaction equations ». Computers & ; Chemical Engineering 68 (septembre 2014) : 24–37. http://dx.doi.org/10.1016/j.compchemeng.2014.05.002.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
46

Chen, Gang, Minfu Feng et Xiaoping Xie. « A robust WG finite element method for convection–diffusion–reaction equations ». Journal of Computational and Applied Mathematics 315 (mai 2017) : 107–25. http://dx.doi.org/10.1016/j.cam.2016.10.029.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
47

Cherniha, Roman, et Oleksii Pliukhin. « Symmetries and solutions of reaction-diffusion-convection equations with power diffusivities ». PAMM 7, no 1 (décembre 2007) : 2040065–66. http://dx.doi.org/10.1002/pamm.200700744.

Texte intégral
Styles APA, Harvard, Vancouver, ISO, etc.
48

Cheng, Heng, Zebin Xing et Yan Liu. « The Improved Element-Free Galerkin Method for 3D Steady Convection-Diffusion-Reaction Problems with Variable Coefficients ». Mathematics 11, no 3 (3 février 2023) : 770. http://dx.doi.org/10.3390/math11030770.

Texte intégral
Résumé :
In order to obtain the numerical results of 3D convection-diffusion-reaction problems with variable coefficients efficiently, we select the improved element-free Galerkin (IEFG) method instead of the traditional element-free Galerkin (EFG) method by using the improved moving least-squares (MLS) approximation to obtain the shape function. For the governing equation of 3D convection-diffusion-reaction problems, we can derive the corresponding equivalent functional; then, the essential boundary conditions are imposed by applying the penalty method; thus, the equivalent integral weak form is obtained. By introducing the IMLS approximation, we can derive the final solved linear equations of the convection-diffusion-reaction problem. In numerical examples, the scale parameter and the penalty factor of the IEFG method for such problems are discussed, the convergence is proved numerically, and the calculation efficiency of the IEFG method are verified by four numerical examples.
Styles APA, Harvard, Vancouver, ISO, etc.
49

Di Francesco, Marco, Klemens Fellner et Peter A. Markowich. « The entropy dissipation method for spatially inhomogeneous reaction–diffusion-type systems ». Proceedings of the Royal Society A : Mathematical, Physical and Engineering Sciences 464, no 2100 (21 août 2008) : 3273–300. http://dx.doi.org/10.1098/rspa.2008.0214.

Texte intégral
Résumé :
We study the long-time asymptotics of reaction–diffusion-type systems that feature a monotone decaying entropy (Lyapunov, free energy) functional. We consider both bounded domains and confining potentials on the whole space for arbitrary space dimensions. Our aim is to derive quantitative expressions for (or estimates of) the rates of convergence towards an (entropy minimizing) equilibrium state in terms of the constants of diffusion and reaction and with respect to conserved quantities. Our method, the so-called entropy approach, seeks to quantify convergence to equilibrium by using functional inequalities, which relate quantitatively the entropy and its dissipation in time. The entropy approach is well suited to nonlinear problems and known to be quite robust with respect to model variations. It has already been widely applied to scalar diffusion–convection equations, and the main goal of this paper is to study its generalization to systems of partial differential equations that contain diffusion and reaction terms and admit fewer conservation laws than the size of the system. In particular, we successfully apply the entropy approach to general linear systems and to a nonlinear example of a reaction–diffusion–convection system arising in solid-state physics as a paradigm for general nonlinear systems.
Styles APA, Harvard, Vancouver, ISO, etc.
50

Linss, T., et M. Stynes. « Numerical Solution of Systems of Singularly Perturbed Differential Equations ». Computational Methods in Applied Mathematics 9, no 2 (2009) : 165–91. http://dx.doi.org/10.2478/cmam-2009-0010.

Texte intégral
Résumé :
AbstractA survey is given of current research into the numerical solution of timeindependent systems of second-order differential equations whose diffusion coefficients are small parameters. Such problems are in general singularly perturbed. The equations in these systems may be coupled through their reaction and/or convection terms. Only numerical methods whose accuracy is guaranteed for all values of the diffusion parameters are considered here. Some new unifying results are also presented.
Styles APA, Harvard, Vancouver, ISO, etc.
Vous pouvez également être intéressé par les bibliographies sur le sujet « Reaction-convection-diffusion equations » pour d’autres types de sources :
Thèses Livres
Nous offrons des réductions sur tous les plans premium pour les auteurs dont les œuvres sont incluses dans des sélections littéraires thématiques. Contactez-nous pour obtenir un code promo unique!

Vers la bibliographie