Abstract
We investigate the general constitutive relation of an isotropic linear fluid when the stress tensor can depend on higher-order spatial gradients of the velocity. We apply the results to the case of second-grade and third-grade fluids, be they compressible or not. However, the expression of the general isotropic tensor can be a matter of interest also for other classes of nonsimple material.
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Musesti, A. Isotropic linear constitutive relations for nonsimple fluids. Acta Mech 204, 81–88 (2009). https://doi.org/10.1007/s00707-008-0050-6
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DOI: https://doi.org/10.1007/s00707-008-0050-6