A recently introduced variational method (Sochi, Rheol Acta 53:15–22, 2014) has been used to obtain flow profiles for generalised Newtonian fluids in steady rectilinear flow. This Comment examines the relationship between this variational method and the dynamical equations for such flows.
机构:
Natl Ctr Sci Res Demokritos, INT RP, Environm Res Lab, Athens 15310, GreeceNatl Ctr Sci Res Demokritos, INT RP, Environm Res Lab, Athens 15310, Greece