“…In another paper, Song 5 considered the time‐dependent double‐diffusive convective Darcy flow in a semi‐infinite channel and the Saint–Venant type decay of the solutions on a is obtained. For more works, one can see previous studies 6–15 . However, these papers need to assume that the solutions satisfy certain a priori assumptions at the infinity of the cylinder or the channel.…”
Section: Introductionmentioning
confidence: 99%
“…For more works, one can see previous studies. [6][7][8][9][10][11][12][13][14][15] However, these papers need to assume that the solutions satisfy certain a priori assumptions at the infinity of the cylinder or the channel.…”
Section: Introductionmentioning
confidence: 99%
“…10,11,12,13,14) are positive constants to be determined later. Next, we choose 𝜀 i (i = 1, 2, 3, … , 14) small enough and 𝛿 large enough such that −𝜔𝜂 S ,𝛼 S ,𝛼 dx 2 d𝜉d𝜂 −𝜔𝜂 ,𝛼 ,𝛼 dx 2 d𝜉d𝜂 + −𝜔𝜂 ,𝛼 ,𝛼 dx 2 d𝜉d𝜂.…”
This paper investigates the spatial behavior of the solutions of the double-diffusive Darcy plane flow in a semi-infinite channel. Using the energy estimate method and the differential inequality technology, a differential inequality about the solutions is derived. By solving this differential inequality, it is proved that the solutions grow polynomially or decay exponentially with spatial variable. In the case of decay, we obtain the upper bound for the total energy. We also give some remarks to generalize the results of this paper.
“…In another paper, Song 5 considered the time‐dependent double‐diffusive convective Darcy flow in a semi‐infinite channel and the Saint–Venant type decay of the solutions on a is obtained. For more works, one can see previous studies 6–15 . However, these papers need to assume that the solutions satisfy certain a priori assumptions at the infinity of the cylinder or the channel.…”
Section: Introductionmentioning
confidence: 99%
“…For more works, one can see previous studies. [6][7][8][9][10][11][12][13][14][15] However, these papers need to assume that the solutions satisfy certain a priori assumptions at the infinity of the cylinder or the channel.…”
Section: Introductionmentioning
confidence: 99%
“…10,11,12,13,14) are positive constants to be determined later. Next, we choose 𝜀 i (i = 1, 2, 3, … , 14) small enough and 𝛿 large enough such that −𝜔𝜂 S ,𝛼 S ,𝛼 dx 2 d𝜉d𝜂 −𝜔𝜂 ,𝛼 ,𝛼 dx 2 d𝜉d𝜂 + −𝜔𝜂 ,𝛼 ,𝛼 dx 2 d𝜉d𝜂.…”
This paper investigates the spatial behavior of the solutions of the double-diffusive Darcy plane flow in a semi-infinite channel. Using the energy estimate method and the differential inequality technology, a differential inequality about the solutions is derived. By solving this differential inequality, it is proved that the solutions grow polynomially or decay exponentially with spatial variable. In the case of decay, we obtain the upper bound for the total energy. We also give some remarks to generalize the results of this paper.
“…The inspiration of the study came from the fluid equations. There have been a lot of articles in the literature to study the stability of fluid equations (for interest, see [17][18][19][20][21][22][23][24][25][26][27][28][29]).…”
In this paper, we consider the initial-boundary value problem for the two-dimensional primitive equations of the large-scale oceanic dynamics. These models are often used to predict weather and climate change. Using the differential inequality technique, rigorous a priori bounds of solutions and the continuous dependence on the heat source are established. We show the application of symmetry in mathematical inequalities in practice.
“…In addition, mathematical analysis of the structural stability of the two layer system has been thoroughly investigated, see e.g. Li et al [31], Li et al [33], Li et al [32], Payne and Straughan [41].…”
A bidisperse porous medium is one with two porosity scales. There are the usual pores known as macro pores but also cracks or fissures in the skeleton which give rise to micro pores. In this article we develop and analyse a model for thermal convection where a layer of viscous incompressible fluid overlies a layer of bidisperse porous medium. Care has to be taken with the boundary conditions at the interface of the fluid and the porous material and this aspect is investigated. The situation is one in a layer which is heated from below and under appropriate conditions bimodal neutral curves are found. These depend on the ratio d of the depth d of the fluid layer to the depth dm of the porous layer. We show that there is a critical value of d such that below this value convective motion initiates in the porous layer whereas for d above this value the convective instability commences in the fluid layer.
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