2004
DOI: 10.1016/j.jde.2003.10.014
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An Oleinik-type estimate for a convection–diffusion equation and convergence to N-waves

Abstract: In this article we propose an Oleinik-type estimate for sign-changing solutions to a convection-diffusion equation u t þ ðjuj g =gÞ x ¼ mu xx ; uðx; 0Þ ¼ u 0 ðxÞ; u; xAR; 1ogp2; m; t40:Since the Oleinik entropy inequality holds for nonnegative solutions or inviscid case ðm ¼ 0Þ only, the theoretical progress for the case was limited. In this paper we show that its solution satisfies an Oleinik-type estimate, t 2 g u x pC; 1ogp2; t40;where C ¼ Cðu 0 ; gÞ40: Using this estimate, the convergence to an N-wave is p… Show more

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Cited by 6 publications
(13 citation statements)
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“…In this situation, some sufficient conditions on U(0) are given in [19] for the solution to (2.19) to exhibit a diffusion-dominated large time behavior. Also, convergence to N-waves is studied in [20] but, for solutions satisfying (2.20), no condition is given in that paper which guarantees that U(t) really behaves as an N-wave for large times. As a consequence of our analysis, we specify such a condition and also provide several new information on the large time behavior of solutions to (2.19) satisfying (2.20).…”
Section: Non-positive Initial Conditionsmentioning
confidence: 99%
“…In this situation, some sufficient conditions on U(0) are given in [19] for the solution to (2.19) to exhibit a diffusion-dominated large time behavior. Also, convergence to N-waves is studied in [20] but, for solutions satisfying (2.20), no condition is given in that paper which guarantees that U(t) really behaves as an N-wave for large times. As a consequence of our analysis, we specify such a condition and also provide several new information on the large time behavior of solutions to (2.19) satisfying (2.20).…”
Section: Non-positive Initial Conditionsmentioning
confidence: 99%
“…and prove the compactness of the family {u µ } µ (as µ tends to zero) in a suitable functional space. In order to make the reading easier, since α is fixed and µ is a parameter that tends to zero, we omit the index α and only keep the notation u µ when referring to the solution of systems like (14).…”
Section: Nonlocal Conservation Lawsmentioning
confidence: 99%
“…Lorsque la masse totale M = R u 0 (x) dx = 0, ce problème aété considéré en particulier dans [7,8,12]. Lorsque M = 0, les résultats de [7,8,12] se traduisent seulement par la convergence de u(t) vers zéro dans L 1 (R). Nous présentons, dans cette note, des résultats plus précis pour certaines classes de données initiales.…”
Section: Version Française Abrégéeunclassified
“…The proof of (17) follows from (1) by the maximum principle and the L ∞ -estimate u(t) ∞ ≤ C(q) U 0 1/q ∞ t −1/q [3,10]. Once (15) is established, the proof of (16) is performed by a classical rescaling method [1,12]. (9) and (14) do not involve the same quantities, it can be shown by an application of Gagliardo-Nirenberg inequalities that, if (9) is fulfilled, the quantity involved in (14) is also small.…”
Section: Hyperbolic-dominated Casementioning
confidence: 99%
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