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Wyszukujesz frazę "diffusion-wave equation" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Oscillation of time fractional vector diffusion-wave equation with fractional damping
    Autorzy:
    Ramesh, R.
    Harikrishnan, S.
    Nieto, J. J.
    Prakash, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/255843.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    fractional diffusion-wave equation H-oscillation
    vector differential equation
    Opis:
    In this paper, sufficient conditions for H-oscillation of solutions of a time fractional vector diffusion-wave equation with forced and fractional damping terms subject to the Neumann boundary condition are established by employing certain fractional differential inequality, where H is a unit vector in Rn. The examples are given to illustrate the main results.
    Źródło:
    Opuscula Mathematica; 2020, 40, 2; 291-305
    1232-9274
    2300-6919
    Pojawia się w:
    Opuscula Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fundamental solution to the Cauchy problem for the time-fractional advection-diffusion equation
    Autorzy:
    Povstenko, Y.
    Klekot, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/122910.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Cauchy problem
    Mittag-Leffler function
    time-fractional diffusion-wave equation
    Opis:
    The one-dimensional time-fractional advection-diffusion equation with the Caputo time derivative is considered. The fundamental solution to the Cauchy problem is obtained using the integral transform technique. The numerical results are illustrated graphically.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2014, 13, 1; 95-102
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some closed form series solutions for the time-fractional diffusion-wave equation in polar coordinates with a generalized Caputo fractional derivative
    Autorzy:
    Elkott, Ibrahim
    Abdel-Latif, Mohamed S.
    El-Kalla, Ibrahim L.
    Abdel Kader, Abass H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24201502.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    generalized time-fractional Caputo derivative
    generalized Laplace transform
    Hankel transform
    diffusion-wave equation
    uogólniona ułamkowa pochodna Caputo w czasie
    uogólniona transformata Laplace'a
    transformata Hankela
    równanie fali dyfuzyjnej
    Opis:
    In this paper, we obtain some closed form series solutions for the time fractional diffusion-wave equation (TFDWE) with the generalized time-fractional Caputo derivative (GTFCD) associated with a source term in polar coordinates. These solutions are found using generalized Laplace and Hankel transforms. We obtained the closed form series solutions in the form of the Polygamma function. The effect of the fractional order derivative on the diffusion-wave variable is illustrated graphically.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 5--14
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nonlinear Interaction of Modes in a Planar Flow of a Gas with Viscous and Thermal Attenuation
    Autorzy:
    Perelomova, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/177137.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    nonlinear wave theory
    nonlinear acoustics
    coupling dynamic equations
    Burgers equation
    diffusion equation
    Opis:
    The nonlinear interaction of wave and non-wave modes in a gas planar flow are considered. Attention is mainly paid to the case when one sound mode is dominant and excites the counter-propagating sound mode and the entropy mode. The modes are determined by links between perturbations of pressure, density, and fluid velocity. This definition follows from the linear conservation equations in the differentia form and thermodynamic equations of state. The leading order system of coupling equations for interacting modes is derived. It consists of diffusion inhomogeneous equations. The main aim of this study is to identify the principle features of the interaction and to establish individual contributions of attenuation (mechanical and thermal attenuation) in the solution to the system.
    Źródło:
    Archives of Acoustics; 2019, 44, 3; 551-559
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact difference schemes and schemes of higher order of approximation for convection-diffusion equation. I
    Autorzy:
    Lapinska-Chrzczonowicz, M.
    Matus, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/106186.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    convection-diffusion equation
    initial-boundary value problem
    traveling wave
    EDS
    Opis:
    The initial-boundary value problem for a convection-diffusion equation [formula] is considered. The difference scheme, approximating this problem, is constructed. It is shown that for traveling wave solutions the scheme is exact (EDS). The monotonicity of the scheme is also taken into consideration. Presented numerical experiments illustrate the theoretical results investigated in the paper.
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica; 2013, 13, 1; 37-51
    1732-1360
    2083-3628
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio AI, Informatica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of electrochemical parameters starting from the polarization curves of ferrocene at glassy carbon electrode
    Autorzy:
    Neghmouche, N.S.
    Lanez, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411587.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    cyclic voltammetry
    diffusion coefficient
    ferrocene
    half-wave potential
    Randles-Sevcik equation
    Opis:
    This work is a contribution to the calculation of electrochemical parameters from the polarization curves of ferrocene. The parameters are: The anodic (Epa) and the cathodic (Epc) peak potentials, as well as the corresponding anodic (ipa) and cathodic (ipc) peak currents, were obtained at different scan rates (0.05, 0.10, 0.30, 0.50 V.s-1). The half-wave potentials (E1/2) of the couple in the investigated solvents have been evaluated. The diffusion coefficients (D) have been calculated using the Randles-Sevcik equation.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 4; 37-45
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrochemical properties of N'-ferrocenylmethyl-N'-phenylbenzohydrazide in aqueous and organic mediums
    Autorzy:
    Nacer, S.N.
    Lanez, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411788.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    cyclic voltammetry
    diffusion coefficient
    ferrocene derivative
    half-wave potential
    Randles-Sevcik equation
    Opis:
    We carried out a detailed study of the kinetics of oxidation of N'-ferrocenylmethyl-N'-phenylbenzohydrazide (FcX) to ferrocenium ion (FcX+) in aqueous and organic mediums. This study using cyclic (CV) and rotating disk electrode (RDE) voltammetry showed that the FcX/FcX+ redox couple is reversible. The N'-ferrocenylmethyl-N'-phenylbenzohydrazide and ferrocenium ion diffusion coefficients (D) were calculated from these results. In addition, the electron transfer rate constant and the exchange current density for the oxidation of ferrocene were determined. A comparison of the kinetic data obtained from the two electrochemical techniques appears to show that the data from the RDE experiments are more reliable because they are collected under strict mass transport control.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 5; 76-85
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of Diffusion Coefficients for Oxidation of ferrocene derivative synthesized at two different electrodes using Rotating Disk Electrode (RDE)
    Autorzy:
    Nacer, S.N.
    Khelef, A.
    Lanez, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411798.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Rotating Disk Electrode (RDE)
    diffusion coefficient
    ferrocene derivative
    half-wave potential
    Randles-Sevcik equation
    Opis:
    The electrochemical behavior of N'-Ferrocenylmethyl-N'-Phenylbenzohydrazide synthesized is studied by Rotating Disk Electrode (RDE) Voltammetry to study the kinetics of oxidation and the effect of hydrazide group on ferrocene in organic medium. Thus, two different electrodes (Pt and Gc) were used in ordre to determine this latter. According to the ferrocene taken as a witness the hydrazide group related to the ferrocene made oxydation more difficult. This ferrocenic derivative showed an electrochemical stability, a reversible electrochemical system and an electronic attractor effect of these substitutional ferrocene groups. Finally, we calculated some electrochemical parameters which were: the diffusion coefficients (D), the layer thickness in addition to the electron transfer rate.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 39-47
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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