Abstract
Replacing the time-derivatives with spatial gradients is a quite useful and ordinary method to work with the Chapman–Enskog expansion when dealing with non-uniform fluids. However, to perform the substitution, approximated balance equations, which are not frame invariant, are usually used. Alternatively, frame-invariant but not frame-indifferent expansions may be derived. In this paper we analyze the possibility of deriving a Chapman–Enskog expansion both frame-invariant and frame-indifferent.
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More From: Comptes Rendus de l'Academie des Sciences Series IIB Mechanics
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