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Blow-up for the weakly dissipative generalized Camassa-Holm equation
Journal of Inequalities and Applications volume 2014, Article number: 514 (2014)
Abstract
The main goal of this paper is to investigate the blow-up phenomena of solutions to a weakly dissipative generalized Camassa-Holm equation, which contains higher power nonlinear dispersion terms and a convection term. We give a sufficient condition on the initial data such that the strong solution blows up at a finite time, and then we establish an estimate of the blow-up time. Finally, we give a global existence result of the strong solution.
MSC:35A35, 35B30, 35G25, 35Q53.
1 Introduction
In recent years, following the research of the Burgers equation, the KdV equation, and the BBM equation [1], the generalized Camassa-Holm equation
has attracted much attention in the study of mathematical physics, where , .
For , (1.1) is reduced to the classical Camassa-Holm equation
which describes the unidirectional propagation of waves at the free surface of shallow water. stands for the fluid velocity at time t in the spatial direction x. The Camassa-Holm equation (1.2) is bi-Hamiltonian and admits an infinite number of conservation laws [2]. The Camassa-Holm equation (1.2) has been extensively studied by Constantin and Escher [3–6], Lai and Wu [7], and so on. The well-posedness of the Camassa-Holm shallow water equation has been established, and some blow-up scenarios were derived by Constantin and Escher [8], Wu and Yin [9, 10], Lai and Wu [11], Zhou [12], Xin and Zhang [13, 14].
For , (1.1) becomes the Novikov equation
which was recently discovered by Novikov [15]. Since the Novikov equation possesses a matrix Lax pair and has a bi-Hamiltonian structure as the Camassa-Holm equation, this equation has been studied by many researchers in the past few years, the well-posedness and persistence properties were studied by Lai et al. [16], Ni and Zhou [17], Zhao et al. [18]. Jiang and Ni [19] considered the blow-up phenomena for the integrable Novikov equation, Yan et al. [20] gave the global existence and blow-up phenomena for the weakly dissipative Novikov equation.
In this paper, we investigate the Cauchy problem for a generalized weakly dissipative Camassa-Holm equation
where , is a positive integer. Equations (1.4) and (1.1) have similar properties as regards the local well-posedness and blow-up phenomena, but they are different as regards the long time behavior. For example, when , (1.1) is completely integrable and has an infinite number of conservation laws, but for the corresponding equation (1.4), is not conservative.
Zhao et al. [21] studied the existence of global weak solutions to the Cauchy problem of the generalized Novikov equation (1.1). Liu and Yin [22] investigated the blow-up phenomena for the Degasperis-Procesi equation
it is very similar with (1.4), but (1.4) contains the higher power nonlinear dispersion terms , , and the nonlinear convection term .
Compared to [22], the main difficulty in this paper comes from the nonlinear effect of higher power nonlinear dispersion terms , , and the nonlinear convection term . On the other hand, in the proof of the blow-up property of the solution to (1.4), we need the sign of the term , but changes the sign for . Compared to the classical Camassa-Holm equation () and the classical Novikov equation (), the term disappears, accordingly. Therefore, we generalized the blow-up property of solutions to the Cauchy problem (1.4).
We first give a sufficient condition on the initial data such that the strong solution of (1.4) blows up at a finite time, and then we establish an estimate of the blow-up time. Finally, we give a global existence result of the strong solution of (1.4).
The paper is organized as follows. In Section 2, we give some preliminaries used in our investigation. In Section 3, we give in our main conclusion the blow-up scenario and global existence result.
2 Preliminaries
We first review some notations. The convolution between two functions and :
where is the Schwartz class. For any , the Fourier transform of is defined by , the inverse Fourier transform of denoted by . If , , then the norm of is
Set , the Cauchy problem (1.4) becomes
Since is the Green’s function of the differential equation , for all , , and , and thus the Cauchy problem (2.1) can be rewritten as
Zhao et al. [18, 21] gave the local and global existence of solutions to the Cauchy problem (2.2), it is crucial in our discussion.
Lemma 2.1 [18]
Given , , then there exist a constant and a unique solution to (2.2) such that
Moreover, the mapping is Hölder continuous.
We now describe some properties of solutions of the following initial value problem:
where is a solution to the Cauchy problem (2.2). The following important properties are immediate consequence of the classical results in the theory of ordinary differential equations.
Lemma 2.2 Let , , and be the maximal existence time of the corresponding solution to (2.2), then the problem (2.3) has a unique solution . Moreover, the map is an increasing diffeomorphism of R with
Lemma 2.3 Let , , and be the maximal existence time of the corresponding solution to (2.2). For , we have
Proof Let . Thanks to (2.1) and (2.3), we have
the solution of ordinary differential equation is . Since , , we have
This concludes the proof. □
Lemma 2.4 Let be the solution to (2.2). Then we have
Proof When , Lemma 2.4 is a case of Lemma 2.8 in Zhao et al. [21]. The proof carries over with a slight modification and we present it here for the reader’s convenience.
Thanks to and integrating by parts, we have
thus,
Together with (2.1) and (2.2), on integration by parts we have
Therefore,
Integrating with respect to t from 0 to t, we get the desired conclusion. □
Following the proof of Lemma 2.9 given by Zhao et al. in [21], we can obtain a similar blow-up result of the solution to the Cauchy problem (2.2).
Theorem 2.1 Let , , and be the maximal existence time of the corresponding solution to (2.2), then blows up if and only if
3 Blow-up and global existence
Following the local existence Theorem 2.1, we will give our main result on the blow-up property of solution to (2.2). We first give a sufficient condition to guarantee that the solution blows up at a finite time.
Theorem 3.1 Let , , and be the maximal existence time of the corresponding solution to (2.2). Assume or , n is a positive integer, if there exists an such that satisfies
and
Then the corresponding solution to (2.2) with initial data blows up at finite time T with
where , such that
and
Proof For , the result can be found in Wu and Yin [10]. We just show that the results hold for , , and the initial data , for the general case we can use the smooth approximate technique and denseness.
Let be the maximal existence time of the solution to (2.2) with initial data . Thanks to (2.4), (2.5), and (3.1), we have , and, for all , we have
With the help of , , we have
and
After direct calculations we get
and
Thanks to Lemma 2.1, implies that
then , , and .
From (3.6) to (3.8) we have
Notice , using (2.3), (3.6), and (3.7) we have
Now we calculate the first term on the right hand side of (3.10). From (2.3), (3.4), and , we obtain
Substituting (3.11) into (3.10) yields
By (2.1), integration by parts gives
Thanks to and (3.7), we get
Since
we have
and
therefore,
Thanks to (3.3),
together with (3.6) and (3.7),
we have .
Noticing , n is a positive integer, we have
hence
This implies
Similarly, we repeat the above calculations and obtain
Since , then
we have
Inserting (3.15) and (3.17) into (3.12), we get
Thanks to the Cauchy-Schwartz inequality,
from Lemma 2.4, we have
then
Combining (3.18) with (3.20), we have
We now define a function
since is continuously differentiable on , is continuously differentiable on , from (3.21), we obtain
By the assumption
we have .
We claim that
Otherwise, if (3.23) is not true, by the continuity of , there exists a such that, for all ,
and
Combining (3.22) and (3.24), we have, for all ,
since is continuously differentiable on , integrating (3.26) with respect to t from 0 to , we have
Recalling (3.24), we get the desired contradiction, which concludes the proof of the claim.
Since is continuously differentiable and strictly decreasing on , we can choose such that
thanks to (3.22) and (3.28), we have, for all ,
Since is continuously differentiable and strictly negative on , hence is continuously differentiable on , and
Integrating with respect to t over on both sides of (3.30) yields
Since on , we know that the maximal existence time is
such that
Since
this implies
For , from (3.22), we have
that is,
integrating with respect to t over yields
As , , we have
due to , , from (3.32) and (3.35), we can choose
This completes the proof. □
Remark 3.1 The result in Theorem 3.1 contains the cases for : the weakly dissipative Camassa-Holm equation and : the weakly dissipative Novikov equation. We used the method developed by Liu and Yin [22] to deal with the Degasperis-Procesi equation (1.5): , but (1.4) contains higher power nonlinear dispersion terms , , and the nonlinear convection term . When the local solution of (2.2) exists, in the proof of its blow-up property we need the sign of ; see the last term in (3.13). In general, changes the sign for so we give the condition on the power of nonlinear term , in (1.4). For , the last term in (3.13) disappears; for , the last term in (3.13) does not contain . Therefore, we generalized the blow-up property of the solutions to the Cauchy problem (1.4).
Finally we give a global existence result, thanks to Theorem 2.1, this will be done if we can estimate is finite.
Theorem 3.2 Let , . If does not change sign on R, then the problem (2.2) has a strong solution
Proof We just consider , otherwise we can use the smooth approximate technique and denseness. When , then from Lemma 2.2 and Lemma 2.3, we can derive that , for all .
Due to the positivity of the Green’s function and , we obtain , for all , , and , and these imply that, for all ,
we obtain by Theorem 2.1.
When , thanks to Lemma 2.2 and Lemma 2.3, we obtain , for all . Since and due to the positivity of , we obtain , for all , , and , and these imply that, for all ,
we obtain by Theorem 2.1.
Therefore, we find that the solution exists globally in time. □
References
Guo YT, Wang M, Tang YB: Higher regularity of global attractor for a damped Benjamin-Bona-Mahony equation on R . Appl. Anal. 2014. 10.1080/00036811.2014.946561
Camassa R, Holm D: An integrable shallow water equation with peaked solitons. Phys. Rev. Lett. 1993, 71: 1661-1664. 10.1103/PhysRevLett.71.1661
Constantin A, Escher J: Global weak solutions for a shallow water equation. Indiana Univ. Math. J. 1998, 47: 1527-1545.
Constantin A, Escher J: Wave breaking for nonlocal shallow water equations. Acta Math. 1998, 181: 229-243. 10.1007/BF02392586
Constantin A, Escher J: Global existence and blow-up for a shallow water equation. Ann. Sc. Norm. Super. Pisa, Cl. Sci. 1998,XXVI(4):303-328.
Constantin A: Existence of permanent and breaking waves for a shallow water equation: a geometric approach. Ann. Inst. Fourier (Grenoble) 2000, 50: 321-362. 10.5802/aif.1757
Lai S, Wu Y: The local well-posedness and existence of weak solutions for a generalized Camassa-Holm equation. J. Differ. Equ. 2010, 248: 2038-2063. 10.1016/j.jde.2010.01.008
Constantin A, Escher J: On the blow-up rate and the blow-up set of breaking waves for a shallow water equation. Math. Z. 2000, 233: 75-91. 10.1007/PL00004793
Wu S, Yin Z: Blowup, blowup rate and decay of the solution of the weakly dissipative Camassa-Holm equation. J. Math. Phys. 2006, 47: 1-12.
Wu S, Yin Z: Global existence and blow-up phenomena for the weakly dissipative Camassa-Holm equation. J. Differ. Equ. 2009, 246: 4309-4321. 10.1016/j.jde.2008.12.008
Lai S, Wu Y: Global solutions and blow-up phenomena to a shallow water equations. J. Differ. Equ. 2010, 249: 693-706. 10.1016/j.jde.2010.03.008
Zhou Y: Blowup of solutions to the DGH equation. J. Funct. Anal. 2007, 250: 227-248. 10.1016/j.jfa.2007.04.019
Xin Z, Zhang P: On the uniqueness and large time behavior of the weak solution to a shallow water equation. Commun. Partial Differ. Equ. 2002,27(9-10):1815-1844. 10.1081/PDE-120016129
Xin Z, Zhang P: On the weak solution to a shallow water equation. Commun. Pure Appl. Math. 2000, 53: 1411-1433. 10.1002/1097-0312(200011)53:11<1411::AID-CPA4>3.0.CO;2-5
Novikov V: Generalizations of the Camassa-Holm equation. J. Phys. A 2009. 42: Article ID 342002
Lai S, Li N, Wu Y: The existence of global strong and weak solutions for Novikov equation. J. Math. Anal. Appl. 2013, 399: 682-691. 10.1016/j.jmaa.2012.10.048
Ni L, Zhou Y: Well-posedness and persistence properties for the Novikov equation. J. Differ. Equ. 2011, 250: 3002-3201. 10.1016/j.jde.2011.01.030
Zhao Y, Li Y, Yan W: Local well-posedness and persistence property for the generalized Novikov equation. Discrete Contin. Dyn. Syst., Ser. A 2014, 34: 803-820.
Jiang Z, Ni L: Blow-up phenomena for the integrable Novikov equation. J. Math. Anal. Appl. 2012, 385: 551-558. 10.1016/j.jmaa.2011.06.067
Yan W, Li Y, Zhang Y: Global existence and blow-up phenomena for the weakly dissipative Novikov equation. Nonlinear Anal. 2012, 75: 2464-2473. 10.1016/j.na.2011.10.044
Zhao Y, Li Y, Yan W: The global weak solutions to the Cauchy problem of the generalized Novikov equation. Appl. Anal. 2014. 10.1080/00036811.2014.930826
Liu Y, Yin Z: On the blow-up phenomena for the Degasperis-Procesi equation. Int. Math. Res. Not. 2007. 10.1093/imrn/rnm117
Acknowledgements
This work was supported by National Natural Science Foundation of China (grant Nos. 11471129, 11272277).
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YG carried out the blow-up property of solutions. YT carried out the global existence of solutions. All authors read and approved the final manuscript.
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Guo, Y., Tang, Y. Blow-up for the weakly dissipative generalized Camassa-Holm equation. J Inequal Appl 2014, 514 (2014). https://doi.org/10.1186/1029-242X-2014-514
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DOI: https://doi.org/10.1186/1029-242X-2014-514