论文标题

随机对流Brinkman-Forchheimer方程的适应性和渐近行为受到纯跳噪声的干扰

Well-posedness and asymptotic behavior of the stochastic convective Brinkman-Forchheimer equations perturbed by pure jump noise

论文作者

Mohan, Manil T.

论文摘要

本文关注的是随机的对流Brinkman-Forchheimer(SCBF)方程,在有限或周期域中受到乘法纯跳噪声。我们的第一个目标是建立一个可以满足SCBF方程的能量平等(ITô公式)的路径独特的强大解决方案的存在。我们通过使用线性和非线性运算符的单调性属性以及Minty-Browder技术的随机概括来解决SCBF方程的全局可溶性问题。主要的困难是,此类系统无法使用ITô的公式。通过使用近似函数组成stokes运算符元素元素的近似函数来克服该难度,以使近似值界定并在Sobolev和Lebesgue空间中收敛。由于技术困难,我们仅在周期性域中讨论了这种强大解决方案的全局规律性结果。一旦系统得到充分,我们就会寻找强溶液的渐近行为。在这项工作中,建立了固定溶液的指数稳定性结果(在均方根和路径方向上​​),以实现大量有效的粘度。此外,还获得了SCBF方程的稳定结果,还可以使用乘法纯跳噪声。最后,通过使用强溶液的指数稳定性,我们证明了对受乘法纯跳跃噪声的SCBF方程的独特且强烈混合不变的度量的存在。

This paper is concerned about the stochastic convective Brinkman-Forchheimer (SCBF) equations subjected to multiplicative pure jump noise in bounded or periodic domains. Our first goal is to establish the existence of a pathwise unique strong solution satisfying the energy equality (Itô's formula) to the SCBF equations. We resolve the issue of the global solvability of SCBF equations, by using a monotonicity property of the linear and nonlinear operators and a stochastic generalization of the Minty-Browder technique. The major difficulty is that an Itô's formula in infinite dimensions is not available for such systems. This difficulty is overcame by approximating the solution using approximate functions composing of the elements of eigenspaces of the Stokes operator in such a way that the approximations are bounded and converge in both Sobolev and Lebesgue spaces simultaneously. Due to technical difficulties, we discuss about the global in time regularity results of such strong solutions in periodic domains only. Once the system is well-posed, we look for the asymptotic behavior of strong solutions. The exponential stability results (in mean square and pathwise sense) for the stationary solutions is established in this work for large effective viscosity. Moreover, a stabilization result of the SCBF equations by using a multiplicative pure jump noise is also obtained. Finally, we prove the existence of a unique ergodic and strongly mixing invariant measure for the SCBF equations subject to multiplicative pure jump noise, by using the exponential stability of strong solutions.

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