Abstract
Over a large range of the pressure, one cannot ignore the fact that the viscosity grows significantly (even exponentially) with increasing pressure. This paper concerns long-time and large-data existence results for a generalization of the Navier-Stokes fluid whose viscosity depends on the shear rate and the pressure. The novelty of this result stems from the fact that we allow the viscosity to be an unbounded function of pressure as it becomes infinite. In order to include a large class of viscosities and in order to explain the main idea in as simple a manner as possible, we restrict ourselves to a discussion of the spatially periodic problem.
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M. Bulíček’s research is supported by the Nečas Center for Mathematical Modeling, the project LC06052 financed by MSMT
The contribution of J. Málek to this work is a part of the research project MSM 0021620839 financed by MSMT. J. Málek also thanks the Czech Science Foundation, project GACR 201/06/0352, for its support.
K. R. Rajagopal thanks the National Science Foundation for its support.
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Bulíček, M., Málek, J. & Rajagopal, K.R. Analysis of the flows of incompressible fluids with pressure dependent viscosity fulfilling ν(p, ·) → + ∞ AS p → + ∞. Czech Math J 59, 503–528 (2009). https://doi.org/10.1007/s10587-009-0034-2
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DOI: https://doi.org/10.1007/s10587-009-0034-2
Keywords
- existence
- weak solution
- incompressible fluid
- pressure-dependent viscosity
- shear-dependent viscosity
- spatially periodic problem