Skip to content

Advertisement

Boundary Value Problems

Boundary Value Problems Cover Image
  • Research
  • Open Access

Blow up of solutions for a class of fourth order nonlinear pseudo-parabolic equation with a nonlocal source

Boundary Value Problems20152015:109

https://doi.org/10.1186/s13661-015-0369-6

©  Di and Shang 2015

Received: 12 March 2015

Accepted: 3 June 2015

Published: 24 June 2015

Abstract

In this paper, we consider the initial boundary value problem for a fourth order nonlinear pseudo-parabolic equation with a nonlocal source. By using the concavity method, we establish a blow-up result of the solutions under suitable assumptions on the initial energy.

Keywords

  • blow up
  • fourth order
  • nonlinear pseudo-parabolic
  • nonlocal source
  • concavity method

MSC

  • 35B44
  • 35K30
  • 35K59

1 Introduction

In this article, we are concerned with the following initial boundary value problem:
$$\begin{aligned} \textstyle\begin{cases} u_{t}-\triangle{u}-\triangle{u}_{t}+\triangle^{2}u=u^{p}(x,t) \int_{\Omega}K(x,y)u^{p+1}(y,t)\,dy, \quad x\in\Omega, t>0,\\ u(x,0)=u_{0}(x), \quad x\in\Omega,\\ u=\frac{\partial{u}}{\partial{\nu}}=0 \mbox{ or } u=\triangle{u}=0,\quad x\in \partial\Omega, t>0, \end{cases}\displaystyle \end{aligned}$$
(1.1)
where \(p>0\), and Ω is a bounded domain of \(\mathbb {R}^{n}\) (\(n\geq 1\)) with a smooth boundary ∂Ω. Here, ν is the unit outward normal to ∂Ω, and \(K(x,y)\) is an integrable, real valued function such that \(K(x,y)=K(y,x)\). It is well known that this type of equations describes a variety of important physical processes, such as the analysis of heat conduction in materials with memory, viscous flow in materials with memory [1], the theory of heat and mass exchange in stably stratified turbulent shear flow [2], the non-equilibrium water-oil displacement in porous strata [3], the aggregation of populations [4–6], the velocity evolution of ion-acoustic waves in a collisionless plasma when ion viscosity is invoked [7], filtration theory [8, 9], cell growth theory [10, 11], and so on. In population dynamics theory, the nonlocal term indicates that evolution of species at a point of space does not depend only on the nearby density but also on the total amount of species due to the effects of spatial inhomogeneity; see [4].

There have also been many profound results on the existence of global solutions and asymptotic behavior of the solutions for the initial boundary value problems and the initial value problems of fourth order nonlinear pseudo-parabolic equations.

In 1972, Kabanin [8] considered the following problem:
$$\begin{aligned} \textstyle\begin{cases} u_{t}-\beta^{2}{u}_{xxt}+\gamma{u}_{xxxx}=\alpha{u}_{xx},\quad 0< x< l, t>0,\\ u(x,0)=\varphi(x), \quad 0\leq x\leq l,\\ u(0,t)=u(l,t)=u_{xx}(0,t)=u_{xx}(l,t)=0, \quad 0\leq t\leq T, \end{cases}\displaystyle \displaystyle \displaystyle \end{aligned}$$
(1.2)
where α, β, γ are positive constants. A classical solution of this mixed problem is obtained through the Fourier method in the form of a series. Conditions sufficient for uniform convergence of this series are found.
In 1978, Bakiyevich and Shadrin [9] considered the following problem:
$$\begin{aligned} \textstyle\begin{cases} u_{t}-\gamma{u}_{xxt}+\beta{u}_{xxxx}=\alpha{u}_{xx}+f(t,x), \quad x\in \mathbb{R}, t>0,\\ u(x,0)=\varphi(x), \quad x\in\mathbb{R}, \end{cases}\displaystyle \end{aligned}$$
(1.3)
where \(\alpha>0\), \(\beta\geq0\), \(\gamma>0\) are constants. They showed that the solutions of this problem are expressed through the sum of convolutions of functions \(\varphi(x)\) and \(f(t,x)\) with corresponding fundamental solutions of the problem.
Zhao and Xuan [12] studied the following fourth order pseudo-parabolic equation:
$$\begin{aligned} u_{t}-\alpha{u}_{xx}-\gamma{u}_{xxt}+ \beta {u}_{xxxx}+f(u)_{x}=0,\quad x\in \mathbb{R}, t\geq0. \end{aligned}$$
(1.4)
They obtained the existence of the global smooth solutions for the initial value problem of (1.4) and discussed the convergence behavior of solutions as \(\beta\rightarrow0\).
Recently, Khudaverdiyev and Farhadova [13] discussed the following fourth order semilinear pseudo-parabolic equation:
$$\begin{aligned} u_{t}-\alpha{u}_{xxt}+u_{xxxx}=f(t,x,u,u_{x},u_{xx},u_{xxx}), \quad 0\leq {x}\leq1, 0\leq{t}\leq{T}, \end{aligned}$$
(1.5)
with Ionkin type non-self-adjoint mixed boundary conditions, where \(\alpha>0\) is a fixed number. They proved the local existence for a generalized solution of the mixed problem under consideration by combining generalized contracted mapping principle and Schauder’s fixed point principle and then proved the global existence for a generalized solution by means of Schauder’s stronger fixed point principle.

The so-called viscous Cahn-Hilliard equation is also in a class of fourth order nonlinear pseudo-parabolic equations and can be considered as a special case of (1.5). In recent years, a lot of attention has been paid to the viscous Cahn-Hilliard equations. For more and deeper investigations of the stability analysis (as \(t\rightarrow\infty\)) and the asymptotic behavior of viscous Cahn-Hilliard models, we refer readers to [14, 15] and the references therein.

Since the study on blow-up solutions for nonlinear parabolic equation with nonlocal source by Levine in [16], many efforts have been made devoted to the study of blow-up properties for nonlocal semilinear parabolic equations. The upper bound and lower bound of the blow-up time, blow-up rate estimate, blow-up set, and blow-up profile of the blow-up solutions for a various of nonlocal semilinear parabolic equations with nonlocal source terms or nonlocal boundary condition have been widely studied in the last few decades; we refer the readers to [17–29] and the references cited therein.

Korpusov [30] considered a Sobolev type equation with a nonlocal source and obtained blow-up results under suitable conditions on initial data and nonlinear function. In [31], Bouziani studied the solvability of nonlinear pseudo-parabolic equation with a nonlocal boundary condition. More results on the global well-posedness for the nonlinear pseudo-parabolic equation with nonlocal source can be found in [1] and the references therein.

Motivated by the above-mentioned works, we investigate the blow-up behavior of solutions of the initial boundary value problem for a fourth order nonlinear pseudo-parabolic equation with a nonlocal source (1.1). By using the concavity method, we prove a finite time blow-up result under some assumption on the initial energy \(E(0)\).

2 Preliminaries

In this section, we first state a local existence theorem, which can be obtained by Faedo-Galerkin methods. The interested readers are referred to Lions [32] or Escobedo and Herrero [33] for details.

Theorem 2.1

Assume that \(p>0\) and \(u_{0}\in{H}_{0}^{2}(\Omega)\). Then there exists a \(T_{m}>0\) for which problem (1.1) has a unique local solution \(u\in {C}^{1}([0,T_{m});H_{0}^{2}(\Omega))\) satisfying
$$\begin{aligned} (u_{t},v)+(\nabla{u},\nabla{v})+(\nabla{u}_{t}, \nabla {v})+(\triangle {u},\triangle{v})= \biggl(u^{p}(x,t)\int _{\Omega}K(x,y)u^{p+1}(y,t)\,dy,v \biggr), \end{aligned}$$
(2.1)
for all \(v\in{H}_{0}^{2}(\Omega)\) and \(t\in[0,T_{m})\).
Before stating our principal theorem, we note that the Fréchet derivative \(f_{u}\) of the nonlinear function \(f(u)=u^{p}(x,t)\int_{\Omega}K(x,y)u^{p+1}(y,t)\,dy \) is
$$\begin{aligned} f_{u}\cdot{h}(x,t) =&pu^{p-1}(x,t)h(x,t)\int _{\Omega }K(x,y)u^{p+1}(y,t)\,dy \\ &{}+(p+1)u^{p}(x,t)\int_{\Omega}K(x,y)u^{p}(y,t)h(y,t) \,dy, \quad \forall u\in{H}^{2}(\Omega). \end{aligned}$$
Clearly \(f_{u}\) is symmetric and bounded, so that the potential F exists and is given by
$$\begin{aligned} F(u) =&\int_{0}^{1} \bigl(f( \rho{u}),u \bigr)\,d\rho \\ =&\int_{0}^{1}\int_{\Omega} \rho^{p}u^{p}(x,t) \biggl[\int_{\Omega }K(x,y) \rho^{p+1}u^{p+1}(y,t)\,dy \biggr]u(x,t)\,dx\,d\rho \\ =&\frac{1}{2p+2}\int_{\Omega}\int_{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t) \,dx \,dy. \end{aligned}$$
(2.2)
Now, differentiating the identity (2.2) with respect to t, it follows that
$$\begin{aligned} \frac{d}{dt}F(u) =&\frac{1}{2p+2}\frac{d}{dt}\int _{\Omega}\int_{\Omega}K(x,y)u^{p+1}(x,t)u^{p+1}(y,t) \,dx \,dy \\ =&\frac{1}{2}\int_{\Omega}\int_{\Omega }K(x,y)u^{p}(x,t)u^{p+1}(y,t)u_{t}(x,t) \,dx \,dy \\ &{} +\frac{1}{2}\int_{\Omega}\int_{\Omega }K(x,y)u^{p}(y,t)u^{p+1}(x,t)u_{t}(y,t) \,dx \,dy \\ =&\int_{\Omega}\int_{\Omega }K(x,y)u^{p}(x,t)u^{p+1}(y,t)u_{t}(x,t) \,dx\,dy= \bigl(f(u),u_{t} \bigr), \end{aligned}$$
(2.3)
where we have used the symmetry of \(K(x,y)\).
To obtain the blow-up result, we will introduce the energy function. We have
$$\begin{aligned} E(t) =&\frac{1}{2}\int_{\Omega}| \nabla{u}|^{2}\,dx+\frac {1}{2}\int_{\Omega}| \triangle{u}|^{2}\,dx \\ &{}-\frac{1}{2p+2}\int_{\Omega}\int_{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t) \,dx\,dy. \end{aligned}$$
(2.4)

Lemma 2.1

Let \(p>0\) and u be a solution of the problem (1.1). Then \(E(t)\) is non-increasing function, that is, \(E'(t)\leq0\). Moreover, the following energy equality holds:
$$\begin{aligned} E(t)+\int_{0}^{t} \bigl(|u_{t}|^{2}+| \nabla{u}_{t}|^{2} \bigr)\,dx\,d\tau=E(0). \end{aligned}$$

Proof

Multiplying (1.1) by \(u_{t}\) and integrating over Ω, we have
$$\begin{aligned} &\int_{\Omega}|u_{t}|^{2}\,dx+ \int_{\Omega}|\nabla {u}_{t}|^{2}\,dx+ \frac{1}{2}\frac{d}{dt}\int_{\Omega}|\nabla {u}|^{2}\,dx+\frac{1}{2}\frac{d}{dt}\int _{\Omega}| \triangle{u}|^{2}\,dx \\ &\quad=\int_{\Omega}u^{p}(x,t) \biggl[\int _{\Omega }K(x,y)u^{p+1}(y,t)\,dy \biggr]u_{t}(x,t) \,dx. \end{aligned}$$
Hence, from (2.3), we obtain
$$\begin{aligned} &\int_{\Omega}|u_{t}|^{2}\,dx+\int _{\Omega}|\nabla {u}_{t}|^{2}\,dx+ \frac{1}{2}\frac{d}{dt}\int_{\Omega}|\nabla {u}|^{2}\,dx+\frac{1}{2}\frac{d}{dt}\int _{\Omega}| \triangle{u}|^{2}\,dx \\ &\quad=\frac{1}{2p+2}\frac{d}{dt}\int_{\Omega}\int _{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t)\,dx \,dy \end{aligned}$$
and
$$\begin{aligned} \int_{\Omega}|u_{t}|^{2}\,dx+ \int_{\Omega}|\nabla {u}_{t}|^{2}\,dx+ \frac {d}{dt}E(t)=0. \end{aligned}$$
(2.5)
Integrating (2.5) from 0 to t, we find
$$\begin{aligned} E(t)+\int_{0}^{t}\int _{\Omega} \bigl(|u_{t}|^{2}+|\nabla {u}_{t}|^{2} \bigr)\,dx\,d\tau=E({0}). \end{aligned}$$
(2.6)
The proof of the Lemma 2.1 is completed. □

3 Blow up of solutions

Now, we will state the blow-up result of the solutions to the problem (1.1).

Theorem 3.1

Assume that \(p>0\) and \(u_{0}\in{H}_{0}^{2}(\Omega)\). If \(u(x,t)\) is a solution of the problem \((1,1)\) and the initial data \(u_{0}(x)\) satisfies
$$\begin{aligned} \int_{\Omega} \bigl(|u_{0}|^{2}+| \nabla{u}_{0}|^{2} \bigr)\,dx>\eta{E}({0}), \end{aligned}$$
(3.1)
then the solution of problem (1.1) blows up in finite time; that is, the maximum existence time \(T_{\max}\) of \(u(x,t)\) is finite and
$$\begin{aligned} \lim_{t\rightarrow{T_{\max}^{-}}}\int_{0}^{t}\int _{\Omega} \bigl(|u|^{2}+|\nabla{u}|^{2} \bigr) \,dx\,d\tau=+\infty, \end{aligned}$$
where \(\eta=\frac{\alpha}{m}\); \(m=(\frac{\alpha}{2}-1)\lambda_{1}\); \(2\leq\alpha\leq2p+2\); \(\lambda_{1}\) is the first eigenvalue of operator −△ under homogeneous Dirichlet boundary conditions.

Proof

The proof makes use of the so-called ‘concavity method’. Multiplying (1.1) by u and integrating over Ω, we have
$$\begin{aligned} &\frac{1}{2}\frac{d}{dt}\int_{\Omega}|u|^{2} \,dx+ \frac {1}{2}\frac {d}{dt}\int_{\Omega}| \nabla{u}|^{2}\,dx+\int_{\Omega}|\nabla {u}|^{2}\,dx+\int_{\Omega}|\triangle{u}|^{2} \,dx \\ &\quad=\int_{\Omega}u^{p}(x,t) \biggl[\int _{\Omega }K(x,y)u^{p+1}(y,t)\,dy \biggr]u(x,t)\,dx. \end{aligned}$$
Hence
$$\begin{aligned} &\frac{1}{2}\frac{d}{dt}\int_{\Omega}|u|^{2} \,dx+ \frac {1}{2}\frac {d}{dt}\int_{\Omega}| \nabla{u}|^{2}\,dx+\int_{\Omega}|\nabla {u}|^{2}\,dx+\int_{\Omega}|\triangle{u}|^{2} \,dx \\ &\qquad{} -\int_{\Omega}\int_{\Omega}K(x,y)u^{p+1}(x,t)u^{p+1}(y,t) \,dx \,dy+\alpha{E}(u)-\frac{\alpha}{2}\int_{\Omega}| \nabla{u}|^{2}\,dx \\ &\qquad{} -\frac{\alpha}{2}\int_{\Omega}|\triangle{u}|^{2} \,dx+ \frac {\alpha }{2p+2}\int_{\Omega}\int_{\Omega}K(x,y)u^{p+1}(x,t)u^{p+1}(y,t) \,dx \,dy \\ &\quad=\frac{1}{2}\frac{d}{dt} \biggl[\int_{\Omega}|u|^{2} \,dx+ \int_{\Omega }|\nabla{u}|^{2}\,dx \biggr]+ \alpha{E}(u) \\ &\qquad{} + \biggl(\frac{\alpha}{2p+2}-1 \biggr)\int_{\Omega}\int _{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t)\,dx\,dy \\ &\qquad{} + \biggl(1-\frac{\alpha}{2} \biggr)\int_{\Omega}| \nabla{u}|^{2}\,dx+ \biggl(1-\frac {\alpha }{2} \biggr)\int _{\Omega}|\triangle{u}|^{2}\,dx=0. \end{aligned}$$
(3.2)
We consider the following function:
$$\begin{aligned} H(t)=\int_{\Omega} \bigl(|u|^{2}\,dx+| \nabla{u}|^{2} \bigr)\,dx-\eta{E}({0}). \end{aligned}$$
(3.3)
From (3.2), (3.3), Lemma 2.1, and Poincaré’s inequality, we have
$$\begin{aligned} &\frac{1}{2}\frac{d}{dt}H(t) \\ &\quad=\frac{1}{2}\frac{d}{dt}\int_{\Omega } \bigl(|u|^{2}+|\nabla{u}|^{2} \bigr)\,dx \\ &\quad= \biggl(\frac{\alpha}{2}-1 \biggr)\int_{\Omega} \bigl(| \nabla {u}|^{2}+|\triangle {u}|^{2} \bigr)\,dx-\alpha{E}(u) \\ &\qquad{} + \biggl(1-\frac{\alpha}{2p+2} \biggr)\int_{\Omega}\int _{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t)\,dx \,dy \\ &\quad= \biggl(\frac{\alpha}{2}-1 \biggr)\int_{\Omega} \bigl(| \nabla {u}|^{2}+|\triangle {u}|^{2} \bigr)\,dx- \alpha{E}(u_{0})+\alpha\int_{0}^{t}\int _{\Omega } \bigl(|u_{t}|^{2}+| \nabla{u}_{t}|^{2} \bigr)\,dx\,d\tau \\ &\qquad{} + \biggl(1-\frac{\alpha}{2p+2} \biggr)\int_{\Omega}\int _{\Omega }K(x,y)u^{p+1}(x,t)u^{p+1}(y,t)\,dx \,dy \\ &\quad\geq \biggl(\frac{\alpha}{2}-1 \biggr)\int_{\Omega} \bigl(|\nabla {u}|^{2}+|\triangle {u}|^{2} \bigr)\,dx- \alpha{E}(u_{0}) \\ &\quad\geq \biggl(\frac{\alpha}{2}-1 \biggr)\lambda_{1}\int _{\Omega} \bigl(|\nabla {u}|^{2}+|{u}|^{2} \bigr)\,dx-\alpha{E}(u_{0}) \\ &\quad=m \biggl[\int_{\Omega} \bigl(|\nabla{u}|^{2}+|{u}|^{2} \bigr)\,dx-\eta {E}(u_{0}) \biggr]=mH(t), \end{aligned}$$
(3.4)
where \(\eta=\frac{\alpha}{m}\); \(m=(\frac{\alpha}{2}-1)\lambda_{1}\); \(2\leq\alpha\leq2p+2\); \(\lambda_{1}\) is the first eigenvalue of operator −△ under homogeneous Dirichlet boundary conditions.
Due to the conditions (3.1), it follows that
$$\begin{aligned} H(0)=\int_{\Omega} \bigl(|u_{0}|^{2}+| \nabla{u}_{0}|^{2} \bigr)\,dx-\eta {E}(u_{0})>0. \end{aligned}$$
(3.5)
Multiplying (3.4) by \(e^{-2mt}\), we have
$$\begin{aligned} e^{-2mt}\frac{d}{dt}H(t)-2me^{-2mt}H(t)=\frac {d}{dt} \bigl[e^{-2mt}H(t) \bigr]\geq0. \end{aligned}$$
From the last inequality above and (3.5), we obtain
$$\begin{aligned} H(t)\geq{H}(0)e^{2mt}>0. \end{aligned}$$
(3.6)
From what has been discussed above, we find
$$\begin{aligned} \frac{1}{2}\frac{d}{dt}\int_{\Omega} \bigl(|u|^{2}+|\nabla {u}|^{2} \bigr)\,dx>\alpha\int _{0}^{t}\int_{\Omega} \bigl(|u_{t}|^{2}+|\nabla {u}_{t}|^{2} \bigr)\,dx\,d\tau. \end{aligned}$$
(3.7)
Now we define
$$\begin{aligned} G(t)=\int_{0}^{t}\int _{\Omega} \bigl(|u|^{2}+|\nabla{u}|^{2} \bigr) \,dx\,d\tau. \end{aligned}$$
(3.8)
Differentiating the identity (3.8) with respect to t, we deduce that
$$\begin{aligned}& G'(t)=\int_{\Omega} \bigl(|u|^{2}+| \nabla{u}|^{2} \bigr)\,dx, \\& G''(t)=\frac{d}{dt}\int_{\Omega} \bigl(|u|^{2}+|\nabla {u}|^{2} \bigr)\,dx\geq2\alpha\int _{0}^{t}\int_{\Omega} \bigl(|u_{t}|^{2}+|\nabla {u}_{t}|^{2} \bigr)\,dx\,d\tau, \end{aligned}$$
so we have
$$\begin{aligned} G''(t)G(t) \geq&2\alpha\int _{0}^{t}\int_{\Omega} \bigl(|u_{t}|^{2}+|\nabla{u}_{t}|^{2} \bigr)\,dx\,d\tau\cdot\int_{0}^{t}\int _{\Omega} \bigl(|u|^{2}+|\nabla{u}|^{2} \bigr) \,dx\,d\tau \\ \geq& 2\alpha\int_{0}^{t}\int _{\Omega}|u_{t}|^{2}\,dx\,d\tau\cdot \int _{0}^{t}\int_{\Omega}|u|^{2} \,dx\,d\tau \\ &{} +2\alpha\int_{0}^{t}\int _{\Omega}|u_{t}|^{2}\,dx\,d\tau\cdot\int _{0}^{t}\int_{\Omega}| \nabla{u}|^{2}\,dx\,d\tau \\ &{} +2\alpha\int_{0}^{t}\int _{\Omega}|\nabla{u}_{t}|^{2}\,dx\,d\tau \cdot \int_{0}^{t}\int_{\Omega}|u|^{2} \,dx\,d\tau \\ &{} +2\alpha\int_{0}^{t}\int _{\Omega}|\nabla{u}_{t}|^{2}\,dx\,d\tau \cdot \int_{0}^{t}\int_{\Omega}| \nabla{u}|^{2}\,dx\,d\tau. \end{aligned}$$
(3.9)
Using Schwarz’s inequality, we get
$$\begin{aligned}& \biggl(\int_{0}^{t}\int_{\Omega}uu_{t} \,dx\,d\tau \biggr)^{2}\leq\int_{0}^{t} \int_{\Omega}|u_{t}|^{2}\,dx\,d\tau\cdot\int _{0}^{t}\int_{\Omega }|u|^{2} \,dx\,d\tau, \end{aligned}$$
(3.10)
$$\begin{aligned}& \biggl(\int_{0}^{t}\int_{\Omega} \nabla{u}\nabla{u}_{t}\,dx\,d\tau \biggr)^{2}\leq\int _{0}^{t}\int_{\Omega}| \nabla{u}_{t}|^{2}\,dx\,d\tau\cdot \int_{0}^{t} \int_{\Omega}|\nabla{u}|^{2}\,dx\,d\tau, \end{aligned}$$
(3.11)
and
$$\begin{aligned} &2\int_{0}^{t}\int _{\Omega}uu_{t}\,dx\,d\tau\cdot\int_{0}^{t} \int_{\Omega}\nabla{u}\nabla{u}_{t}\,dx\,d\tau \\ &\quad\leq2 \biggl(\int_{0}^{t}\int _{\Omega}|u_{t}|^{2}\,dx\,d\tau \biggr)^{\frac {1}{2}}\cdot \biggl(\int_{0}^{t}\int _{\Omega}|u|^{2}\,dx\,d\tau \biggr)^{\frac{1}{2}} \\ &\qquad{} \cdot \biggl(\int_{0}^{t}\int _{\Omega}|\nabla {u}_{t}|^{2}\,dx\,d\tau \biggr)^{\frac{1}{2}}\cdot \biggl(\int_{0}^{t}\int _{\Omega}|\nabla {u}|^{2}\,dx\,d\tau \biggr)^{\frac{1}{2}} \\ &\quad\leq\int_{0}^{t}\int_{\Omega}| \nabla{u}_{t}|^{2}\,dx\,d\tau\cdot \int_{0}^{t} \int_{\Omega}|{u}|^{2}\,dx\,d\tau \\ &\qquad{} +\int_{0}^{t}\int_{\Omega}|u_{t}|^{2} \,dx\,d \tau\cdot\int_{0}^{t}\int _{\Omega}| \nabla{u}|^{2}\,dx\,d\tau. \end{aligned}$$
(3.12)
Inserting (3.10)-(3.12) into (3.9), we find
$$\begin{aligned} G''(t)G(t) \geq&2\alpha \biggl(\int _{0}^{t}\int_{\Omega }uu_{t} \,dx\,d \tau \biggr)^{2}+2\alpha \biggl(\int_{0}^{t} \int_{\Omega }\nabla {u}\nabla{u}_{t}\,dx\,d\tau \biggr)^{2} \\ &{}+4\alpha\int_{0}^{t}\int_{\Omega}uu_{t} \,dx\,d \tau\cdot\int_{0}^{t}\int _{\Omega} \nabla{u}\nabla{u}_{t}\,dx\,d\tau \\ =&2\alpha \biggl[\int_{0}^{t}\int _{\Omega}(uu_{t}+\nabla{u}\nabla {u}_{t})\,dx \,d\tau \biggr]^{2} \\ =&\frac{\alpha}{2} \biggl(\int_{0}^{t}G''( \tau)\,d\tau \biggr)=\frac{\alpha }{2} \bigl(G'(t)-G'(0) \bigr)^{2}. \end{aligned}$$
(3.13)
Thus, we obtain
$$\begin{aligned} G''(t)G(t)-\frac{\alpha}{2} \bigl(G'(t)-G'(0) \bigr)^{2}\geq0. \end{aligned}$$
(3.14)
On the other hand, from (3.6), we know
$$\begin{aligned} \lim_{t\rightarrow\infty}H(t)=+\infty. \end{aligned}$$
This implies
$$\begin{aligned} G'(t)=\int_{\Omega} \bigl[|u|^{2}+|\nabla{u}|^{2} \bigr]\,dx\rightarrow +\infty, \quad t\rightarrow\infty. \end{aligned}$$
(3.15)
Hence, for \(2<\beta<\alpha\) there exists a \(T_{\beta}\), such that for all \(t\geq{T}_{\beta}\)
$$\begin{aligned} \alpha \bigl(G'(t)-G'(0) \bigr)^{2}\geq\beta{G}'(t)^{2}. \end{aligned}$$
(3.16)
By (3.14) and (3.16), we have
$$\begin{aligned} G''(t)G(t)-\frac{\beta}{2}{G}'(t)^{2} \geq0,\quad t\geq{T}_{\beta}. \end{aligned}$$
(3.17)
We consider the function \(G(t)^{-q}\) for \(0< q<\frac{\beta}{2}\), we see that
$$\begin{aligned} \bigl(G(t)^{-q} \bigr)'' =&qG(t)^{-q-2} \bigl[(q+1){G}'(t)^{2}-G''(t)G(t) \bigr] \\ \leq&{q}G(t)^{-q-2} \biggl[\frac{2(q+1)}{\beta}-1 \biggr]G''(t)G(t)< 0, \quad t\geq{T}_{\beta}. \end{aligned}$$
(3.18)
Since a concave function must always lie below any tangent line, we see that \(G(t)^{-q}\) reaches 0 in finite time as \(t\rightarrow{T}^{-}\), where \(T>T_{\beta}\). This means
$$\begin{aligned} \lim_{t\rightarrow{T}^{-}}G(t)=+\infty, \end{aligned}$$
or
$$\begin{aligned} \lim_{t\rightarrow{T}^{-}}\int_{0}^{t} \int_{\Omega} \bigl(|u|^{2}+|\nabla {u}|^{2} \bigr)\,dx\,d\tau=+\infty. \end{aligned}$$
(3.19)
Then the desired assertion immediately follows. □

Declarations

Acknowledgements

This work is supported by the NSF of China (11401122, 40890153), the Scientific Program (2008B080701042) of Guangdong Province.

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors’ Affiliations

(1)
School of Mathematics and Information Science, Guangzhou University, Guangzhou, China
(2)
Key Laboratory of Mathematics and Interdisciplinary Sciences of Guangdong Higher Education, Guangzhou, China

References

  1. Al’shin, AB, Korpusov, MO, Siveshnikov, AG: Blow-up in Nonlinear Sobolev Type Equations. De Gruyter Series in Nonlinear Analysis and Applications, vol. 15. de Gruyter, Berlin (2011) MATHView ArticleGoogle Scholar
  2. Barenblatt, GI, Bertsch, M, DalPasso, R, Ughi, M: A degenerate pseudoparabolic regularization of a nonlinear forward-backward heat equation arising in the theory of heat and mass exchange in stably stratified turbulent shear flow. SIAM J. Math. Anal. 24(6), 1414-1439 (1993) MATHMathSciNetView ArticleGoogle Scholar
  3. Barenblatt, GI, Azorero, JG, Pablo, AD, Vazquez, JL: Mathematical model of the non-equilibrium water-oil displacement in porous strata. Appl. Anal. 65(1-2), 19-45 (1997) MATHMathSciNetView ArticleGoogle Scholar
  4. Furter, J, Grinfeld, M: Local versus nonlocal interactions in population dynamics. J. Math. Biol. 27(1), 65-80 (1989) MATHMathSciNetView ArticleGoogle Scholar
  5. Cantrell, RS, Consner, C: Diffusive logistic equations with indefinite weights: population models in disrupted environments. SIAM J. Math. Anal. 22(4), 1043-1064 (1991) MATHMathSciNetView ArticleGoogle Scholar
  6. Padron, V: Effect of aggregation on population recovery modeled by a forward-backward pseudoparabolic equation. Trans. Am. Math. Soc. 356(7), 2739-2756 (2004) MATHMathSciNetView ArticleGoogle Scholar
  7. Rosenau, P: Evolution and breaking of the ion-acoustic waves. Phys. Fluids 31(6), 1317-1319 (1988) MATHMathSciNetView ArticleGoogle Scholar
  8. Kabanin, VA: Solution of mixed problem for fourth order equation. Differ. Uravn. 8(1), 54-61 (1972) Google Scholar
  9. Bakiyevich, NI, Shadrin, GA: Cauchy problem for an equation in filtration theory. Sb. Trudov Mosgospedinstituta. 7, 47-63 (1978) Google Scholar
  10. Bai, F, Elliott, CM, Gardiner, A, Spence, A, Stuart, AM: The viscous Cahn-Hilliard equation. I: computations. Nonlinearity 8(2), 131-160 (1995) MATHMathSciNetView ArticleGoogle Scholar
  11. Elliott, CM, Stuart, AM: Viscous Cahn-Hilliard equation. II: analysis. J. Differ. Equ. 128(2), 387-414 (1996) MATHMathSciNetView ArticleGoogle Scholar
  12. Zhao, HJ, Xuan, BJ: Existence and convergence of solutions for the generalized BBM-Burgers equations. Nonlinear Anal. TMA 28(11), 1835-1849 (1997) MATHMathSciNetView ArticleGoogle Scholar
  13. Khudaverdiyev, KI, Farhadova, GM: On global existence for generalized solution of one-dimensional non-selfadjoint mixed problem for a class of fourth order semilinear pseudo-parabolic equations. Proc. Inst. Math. Mech. Natl. Acad. Sci. Azerb. 31, 119-134 (2009) MATHMathSciNetGoogle Scholar
  14. Grasselli, M, Petzeltova, H, Schimperna, G: Asymptotic behavior of a nonisothermal the viscous Cahn-Hilliard equation with inertial term. J. Differ. Equ. 239(1), 38-60 (2007) MATHMathSciNetView ArticleGoogle Scholar
  15. Qu, CY, Cao, Y: Global existence of solutions for a viscous Cahn-Hilliard equation with gradient dependent potentials and sources. Proc. Indian Acad. Sci. Math. Sci. 123(4), 499-513 (2013) MATHMathSciNetView ArticleGoogle Scholar
  16. Levine, HA: Some nonexistence and instability theorems for solutions of formally parabolic equation of the form \(Pu_{t}=-Au+\mathcal{F}(u)\). Arch. Ration. Mech. Anal. 51, 371-386 (1973) MATHView ArticleGoogle Scholar
  17. Chadam, JM, Peirce, A, Yin, HM: The blow up property of solutions to some diffusion equations with localized nonlinear reactions. J. Math. Anal. Appl. 169(2), 313-328 (1992) MATHMathSciNetView ArticleGoogle Scholar
  18. Budd, C, Dold, J, Stuart, A: Blow-up in a partial differential equation with conserved first integral. SIAM J. Appl. Math. 53(3), 718-742 (1993) MATHMathSciNetView ArticleGoogle Scholar
  19. Wang, MX, Wang, YM: Properties of positive solutions for nonlocal reaction-diffusion problems. Math. Methods Appl. Sci. (Online) 19(4), 1141-1156 (1996) MATHView ArticleGoogle Scholar
  20. Souplet, P: Blow-up in nonlocal reaction-diffusion equations. SIAM J. Math. Anal. 29(6), 1301-1334 (1998) MATHMathSciNetView ArticleGoogle Scholar
  21. Souplet, P: Uniform blow-up profile and boundary behavior for diffusion equations with nonlocal nonlinear source. J. Differ. Equ. 153(2), 374-406 (1999) MATHMathSciNetView ArticleGoogle Scholar
  22. Deng, WB, Liu, QL, Xie, CH: Blow up properties for a class of nonlinear degenerate diffusion equation with nonlocal source. Appl. Math. Mech. 24(11), 1362-1368 (2003) MATHMathSciNetView ArticleGoogle Scholar
  23. Chen, YP, Liu, QL, Xie, CH: Blow-up for degenerate parabolic equations with nonlocal source. Proc. Am. Math. Soc. 132(1), 135-145 (2003) MathSciNetView ArticleGoogle Scholar
  24. Liu, QL, Chen, YP, Xie, CH: Blow-up for a degenerate parabolic equations with a nonlocal source. J. Math. Anal. Appl. 285(2), 487-505 (2003) MATHMathSciNetView ArticleGoogle Scholar
  25. Song, JC: Lower bounds for blow-up time in a nonlocal reaction diffusion problem. Appl. Math. Lett. 24(5), 793-796 (2011) MATHMathSciNetView ArticleGoogle Scholar
  26. Liu, DM, Mu, CL, Qiao, X: Lower bounds estimate for the blow-up time of a nonlinear nonlocal porous medium equation. Acta Math. Sci. 32(3), 1206-1212 (2012) MATHMathSciNetView ArticleGoogle Scholar
  27. Liu, Y: Lower bounds for the blow-up time in a nonlocal reaction diffusion problem under nonlinear boundary conditions. Math. Comput. Model. 57(3-4), 926-931 (2013) MATHView ArticleGoogle Scholar
  28. Fang, ZB, Yang, R, Chai, Y: Lower bounds estimate for the blow-up time for a slow diffusion equation with nonlocal source and inner absorption. Math. Probl. Eng. 2014, Article ID 764248 (2014) MathSciNetGoogle Scholar
  29. Fang, ZB, Zhang, JY: Global and blow up solutions for the nonlinear p-Laplacian evolution equation with weighted nonlinear nonlocal boundary condition. J. Integral Equ. Appl. 26(2), 171-196 (2014) MATHMathSciNetView ArticleGoogle Scholar
  30. Korpusov, MO, Sveshnikov, AG: Blow-up of solutions of a Sobolev-type equation with a nonlocal source. Sib. Mat. Zh. 46(3), 567-578 (2005) MATHMathSciNetView ArticleGoogle Scholar
  31. Bouziani, A: Solvability of nonlinear pseudoparabolic equation with a nonlocal boundary condition. Nonlinear Anal. 55, 883-904 (2003) MATHMathSciNetView ArticleGoogle Scholar
  32. Lions, JL: Quelques méthodes de résolutions des probléms aux limites non linéaires. Dunod, Paris (1969) Google Scholar
  33. Escobedo, M, Herrero, M: A semilinear parabolic system in bounded domain. Ann. Mat. Pura Appl. 165, 315-336 (1993) MATHMathSciNetView ArticleGoogle Scholar

Copyright

© Di and Shang 2015

Advertisement