Research Article | Open Access
Changsheng Dou, Zishu Zhao, "Analytical Solution to 1D Compressible Navier-Stokes Equations", Journal of Function Spaces, vol. 2021, Article ID 6339203, 6 pages, 2021. https://doi.org/10.1155/2021/6339203
Analytical Solution to 1D Compressible Navier-Stokes Equations
Abstract
There exist complex behavior of the solution to the 1D compressible Navier-Stokes equations in half space. We find an interesting phenomenon on the solution to 1D compressible isentropic Navier-Stokes equations with constant viscosity coefficient on , that is, the solutions to the initial boundary value problem to 1D compressible Navier-Stokes equations in half space can be transformed to the solution to the Riccati differential equation under some suitable conditions.
1. Introduction
We consider the 1D compressible Navier-Stokes equations in half space in the following: where stand for the density and velocity of compressible flow. is the constant viscosity coefficient. means the pressure of the flow. We assume the initial data: and the boundary condition:
And let
There is huge literature on the studies of the global existence and large time behavior of solutions to the 1D compressible Navier-Stokes equations. As the viscosity is a positive constant and the initial density away from vacuum, Kanel [1] addressed the problems for sufficiently smooth data, and Serre [2, 3] and Hoff [4] considered the problems for discontinuous initial data. As viscosity depends on density and has a positive constant lower bound, [5–8] gave the global well-posedness and large time behavior of solutions to the system without initial vacuum. However, when the initial data admits the presence of vacuum, many papers are related to compressible fluid dynamics [9–17]. When we get the well-posedness of solutions to the compressible Navier-Stokes equations, the existence of vacuum is a major difficulty. Ding et al. [18] got the global existence of classical solutions to 1D compressible Navier-Stokes equations in bounded domains, provided that satisfies . Ye [19] obtained the global classical large solutions to the Cauchy problem (1) and (2) with the restriction ; . Zhang and Zhu [20] derived the global existence of classical solution to the initial boundary value problem for the one-dimensional Navier-Stokes equations for viscous compressible and heat-conducting fluids in a bounded domain with the Robin boundary condition on temperature. Li et al. [21] derive the uniform upper bound of density and the global well-posedness of strong (classical) large solutions to the Cauchy problem with the external force. For two-dimensional case, global well-posedness of classical solutions to the Cauchy problem or periodic domain problem of compressible Navier-Stokes equations with vacuum was obtained in [22–24] when the first and second viscosity coefficients are and , respectively. Li and Xin [25] derived the global well-posedness and large time asymptotic behavior of strong and classical solutions to the Cauchy problem of the Navier-Stokes equations for viscous compressible barotropic flows in two or three spatial dimensions with vacuum as far field density, provided the smooth initial data are of small total energy and the viscosity coefficients are two constants.
In this paper, we find an interesting phenomenon on the solution to 1D compressible Navier-Stokes equations (1) and (2) with constant viscosity coefficient, that is, the solutions to the problem (1) and (2) in half space can be transformed to the solution to the Riccati differential equation under some suitable conditions. Before stating the main results, we first denote
Theorem 1. The function is the solution to compressible Navier-Stokes equations (1) and (2) with the initial data (3) and boundary condition (4), if and only if and satisfies the Riccati differential equation: where (1)(2)There exist three functions , , and which only depend on such that for .
Theorem 2. If then we have the global existence of (7).
Remark 3. In Theorem 1, we do not know whether the solution of Ricatti equation exist globally, because the existence of general solution to Riccati equation is an open problem. If we add the condition of , , and , such as (25) and (26), the global existence for (7) can be obtained, which can be seen in Theorem 2.
Remark 4. In Theorem 1, the initial value can be bounded in Sobolev space or not bounded in Sobolev space, which is determined by the given specific function for the initial value. (1)Bounded case. Furthermore, if assumed that and , then we have the initial energy . In fact, As a result of basic energy estimate, we easily get (2)Unbounded case. We can see the boundary condition of velocity .
2. The Proof of Main Result
Proof of Theorem 1. If we have the analytical function:
we will get
though the equation
and the boundary condition (4).
So, the derivatives of are
Substituting (18) and (19) into the moment equation, we obtain
i.e.,
If , then satisfies
and and do not depend on the spatial variable .
Therefore, is the solution to the Riccati differential equation (7) with the conditions (8) and (9).
If , satisfies (7), and the conditions (8) and (9) hold; it is easy to get
So, is the solution to compressible Navier-Stokes equations (1) and (2) with the initial data (3) and boundary condition (4).
Since Riccati put forward the Riccati equation in the seventeenth century, there has been no general solution for it for more than 300 years. Although there are many special solutions, none of them can fundamentally solve this equation. Here, we give the global existence for Riccati equation (7) under some condition of , , and , motivated by the results in the reference [26, 27].
Proof of Theorem 2. By taking , equation (7) becomes where . Due to and (10), we have
With (25) and (26), we can obtain the global existence of the Riccati equation (7), according to [26, 27].
3. Example
In this section, we give some examples. First of all, it is easy to check that.
Example 1. Suppose the initial data are both constants and the pressure , we can get that the solution to compressible Navier-Stokes equations (1) and (2) satisfy the result of Theorem 1.
Specially, we can deduce the following interesting example if some nonphysical condition is given.
Example 2. Assume , and suppose that Then, we can get the nontrivial analytical solution to the compressible Navier-Stokes equations (1) and (2) Moreover, we can get the particle path of compressible flow where stands for the initial position of the particle.
Proof. From (27), we have the initial data
and the compatibility condition
By the initial data, we have
Consequently,
Due to the variable substitution
we obtain
Let
then we have that satisfies
The above equation (37) divided by , we get
By the method of constant variation and the compatibility condition , we arrive at
Combining the variation substitutions (34) and (36), we get
From the result of Theorem 1, we finally obtain (28).
Due to the particle path satisfies , we have, from (28),
Direct calculation gives
that is the function (29).☐
Remark 5. In the theorem 1, we can get
However, is not bounded, and it is hard to get the boundedness of and for the given initial data condition (27).
If , then the initial data of velocity . Then, the solution of compressible Navier-Stokes equation (1) and (2) with the pressure can be expressed as
And the particle path of compressible flow is
Remark 6. The functions are also the solution to the following Euler equations: with the assumption of the pressure and initial data. for the second order derivative of with the spatial variable is 0.
Data Availability
All references in this paper can be found on the Web of Science; this manuscript mainly gets some interesting theorems which need serious proof, and there is no data analysis in this paper.
Conflicts of Interest
The authors declare that they have no competing interests.
Authors’ Contributions
All the authors contributed equally and significantly in writing this article. All the authors read and approved the final manuscript.
Acknowledgments
This work was supported by Special Fund for Fundamental Scientific Research of the Beijing Colleges in CUEB (Grant no. QNTD202109), NSFC (Grant no. 11671273), BJNSF (Grant no. 1182007), and Top Young Talents of Beijing Gaochuang Project and CUEB’s Fund Project for reserved discipline leader.
References
- I. Kanel, “A model system of equations for the one-dimensional motion of a gas (in Russian),” Differencial’nye Uravnenija, vol. 4, pp. 721–734, 1968. View at: Google Scholar
- D. Serre, “Solutions faibles globales des quations de Navier-Stokes pour un fluide compressible,” Comptes Rendus de l'Académie des Sciences - Series I - Mathematics, vol. 303, pp. 639–642, 1986. View at: Google Scholar
- D. Serre, “On the one-dimensional equation of a viscous compressible heat-conducting fluid,” Comptes Rendus de l'Académie des Sciences - Series I - Mathematics, vol. 303, pp. 703–706, 1986. View at: Google Scholar
- D. Hoff, “Global existence for 1D compressible isentropic Navier-Stokes equations with large initial data,” Transactions of the American Mathematical Society, vol. 303, pp. 169–181, 1987. View at: Publisher Site | Google Scholar
- A. A. Amosov and A. A. Zlotnik, “Global generalized solutions of the equations of the one-dimensional motion of a viscous heat-conducting gas,” Soviet Mathematics-Doklady, vol. 38, pp. 1–5, 1989. View at: Google Scholar
- H. Beirao da Veiga, “Long time behavior for one-dimensional motion of a general barotropic viscous fluid,” Archive for Rational Mechanics and Analysis, vol. 108, no. 2, pp. 141–160, 1989. View at: Publisher Site | Google Scholar
- A. V. Kazhikhov, “Cauchy problem for viscous gas equations,” Siberian Mathematical Journal, vol. 23, no. 1, pp. 44–49, 1982. View at: Publisher Site | Google Scholar
- I. Straškraba and A. Zlotnik, “On a decay rate for 1D-viscous compressible barotropic fluid equations,” Journal of Evolution Equations, vol. 2, no. 1, pp. 69–96, 2002. View at: Publisher Site | Google Scholar
- Y. Cho and H. Kim, “On classical solutions of the compressible Navier-Stokes equations with nonnegative initial densities,” Manuscripta Mathematica, vol. 120, no. 1, pp. 91–129, 2006. View at: Publisher Site | Google Scholar
- E. Feireisl, Dynamics of Viscous Compressible Fluids, Oxford University Press, New York, NY, USA, 2004.
- F. M. Huang, J. Li, and Z. P. Xin, “Convergence to equilibria and blowup behavior of global strong solutions to the Stokes approximation equations for two-dimensional compressible flows with large data,” Journal de Mathématiques Pures et Appliquées, vol. 86, no. 6, pp. 471–491, 2006. View at: Publisher Site | Google Scholar
- X. D. Huang and J. Li, “Serrin-type blowup criterion for viscous compressible and heat conducting Navier Stokes and magnetohydrodynamic flows,” Communications in Mathematical Physics, vol. 324, no. 1, pp. 147–171, 2013. View at: Publisher Site | Google Scholar
- X. D. Huang, J. Li, and Z. P. Xin, “Global well-posedness of classical solutions with large oscillations and vacuum to the three-dimensional isentropic compressible Navier-Stokes equations,” Communications on Pure and Applied Mathematics, vol. 65, no. 4, pp. 549–585, 2012. View at: Publisher Site | Google Scholar
- J. Li, J. W. Zhang, and J. N. Zhao, “On the global motion of viscous compressible barotropic flows subject to large external potential forces and vacuum,” SIAM Journal on Mathematical Analysis, vol. 47, no. 2, pp. 1121–1153, 2015. View at: Publisher Site | Google Scholar
- P.-L. Lions, Mathematical Topics in Fluid Mechanics, vol. 2 of Compressible Models, Oxford University Press, New York, NY, USA, 1998.
- A. Matsumura and T. Nishida, “The initial value problem for the equations of motion of viscous and heat conductive gases,” Journal of Mathematics of Kyoto University, vol. 20, pp. 67–104, 1980. View at: Google Scholar
- Z. P. Xin, “Blowup of smooth solutions to the compressible Navier-Stokes equation with compact density,” Communications on Pure and Applied Mathematics, vol. 51, no. 3, pp. 229–240, 1998. View at: Publisher Site | Google Scholar
- S. J. Ding, H. Y. Wen, and C. J. Zhu, “Global classical large solutions to 1D compressible Navier-Stokes equations with density-dependent viscosity and vacuum,” Journal of Differential Equations, vol. 251, no. 6, pp. 1696–1725, 2011. View at: Publisher Site | Google Scholar
- Y. L. Ye, “Global classical solution to 1D compressible Navier-Stokes equations with no vacuum at infinity,” Mathematical Methods in the Applied Sciences, vol. 39, no. 4, pp. 776–795, 2016. View at: Publisher Site | Google Scholar
- P. X. Zhang and C. J. Zhu, “Global classical solutions to 1D full compressible Navier-Stokes equations with the Robin boundary condition on temperature,” Nonlinear Analysis: Real World Applications, vol. 47, pp. 306–323, 2019. View at: Publisher Site | Google Scholar
- K. Li, B. Lv, and Y. Wang, “Global well-posedness and large-time behavior of 1D compressible Navier Stokes equations with density-depending viscosity and vacuum in unbounded domains,” Science China Mathematics, vol. 62, pp. 1–14, 2019. View at: Google Scholar
- Q. S. Jiu, Y. Wang, and Z. P. Xin, “Global well-posedness of the Cauchy problem of two-dimensional compressible Navier-Stokes equations in weighted spaces,” Journal of Differential Equations, vol. 255, no. 3, pp. 351–404, 2013. View at: Publisher Site | Google Scholar
- Q. S. Jiu, Y. Wang, and Z. P. Xin, “Global well-posedness of 2D compressible Navier-Stokes equations with large data and vacuum,” Journal of Mathematical Fluid Mechanics, vol. 16, no. 3, pp. 483–521, 2014. View at: Publisher Site | Google Scholar
- J. Li and Z. L. Liang, “On local classical solutions to the Cauchy problem of the two-dimensional barotropic compressible Navier-Stokes equations with vacuum,” Journal de Mathématiques Pures et Appliquées, vol. 102, no. 4, pp. 640–671, 2014. View at: Publisher Site | Google Scholar
- J. Li and Z. P. Xin, “Global well-posedness and large time asymptotic behavior of classical solutions to the compressible Navier-Stokes equations with vacuum,” Annals PDE, vol. 5, no. 1, p. 7, 2019. View at: Publisher Site | Google Scholar
- J. C. Kegley, “A global existence and uniqueness theorem for a Riccati equation,” SIAM Journal on Mathematical Analysis, vol. 14, no. 1, pp. 47–59, 1983. View at: Publisher Site | Google Scholar
- W. Zhang, “Global existence and blow-up for Riccati equation,” Dynamic Systems and Applications, vol. 12, no. 3-4, pp. 251–258, 2003. View at: Google Scholar
Copyright
Copyright © 2021 Changsheng Dou and Zishu Zhao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.