Abstract (EN):
Experiments and numerical simulations are used to investigate the extensional
flow through a 3-D planar hyperbolic micro-contraction. A converging geometry with a
Hencky strain of two was designed to produce a constant extensional rate along the
centerline. This configuration was used for the examination of Newtonian flows at low to
moderate Reynolds numbers and viscoelastic flows at low Deborah numbers. Numerical
simulations of the flow in the micro-contractions were obtained from a finite-volume
method using non-orthogonal block-structured collocated meshes. The numerical results
are compared to experimental measurements. For the base case of Newtonian flow, the
numerical predictions show good agreement with experiments. We also report preliminary
results for a semi-dilute solution of polyethylene oxide.
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
17