Abstract
The stress-relaxation effect is analyzed in a boundary layer flow of elastico-viscous fluids past a circular cylinder. The fluid's constitutive equation employs a time derivative which rotates together with the principal axes of the strain-rate tensor and permits a separate parametric description of the relaxation process and the normal stresses. The results show that the relaxation process retards the separation point and reduces the skin friction, which is in a qualitative agreement with previous experiments.
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