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Zapiski Nauchnykh Seminarov POMI, 1997, Volume 249, Pages 256–293
(Mi znsl589)
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This article is cited in 2 scientific papers (total in 2 papers)
On attractors for equations describing the flow of generalized Newtonian fluids
G. A. Seregin St. Petersburg Department of V. A. Steklov Institute of Mathematics, Russian Academy of Sciences
Abstract:
We consider initial-boundary value problems for equations
\begin{gather*}
\partial_t v+(\nabla v)v-\operatorname{div}\sigma=g-\nabla p, \quad \operatorname{div}v=0,
\\
\sigma=\frac{\partial D}{\partial\varepsilon}(\varepsilon (v)), \quad v\big|_{t=0}=a,
\end{gather*}
describing the $2D$ flow of generalized Newtonian fluids under periodical boundary conditions. It is supposed that $D(\varepsilon)\sim|\varepsilon|^p$ for $|\varepsilon|\gg 1$ and $1<p<2$. Under some additional restrictions imposed on the vector-valued field $g$ and the dissipative potential $D$ existence of a global solution for initial data having the finite $L_2$-norm $(\|a\|_2<+\infty$) is proved. If $\|\nabla a\|_2<+\infty$ and $\frac32\le p<2$, this solution is strong and unique. Strong solution exists and is unique for all $1<p<2$. The last result allows to define a semigroup of solution operators and to prove that it is of class I and possesses of a compact minimal global $\mathscr B$-attractor.
Received: 07.04.1997
Citation:
G. A. Seregin, “On attractors for equations describing the flow of generalized Newtonian fluids”, Boundary-value problems of mathematical physics and related problems of function theory. Part 29, Zap. Nauchn. Sem. POMI, 249, POMI, St. Petersburg, 1997, 256–293; J. Math. Sci. (New York), 101:5 (2000), 3539–3562
Linking options:
https://www.mathnet.ru/eng/znsl589 https://www.mathnet.ru/eng/znsl/v249/p256
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