Mireia Torralba, Jordi Ortín, Rafael Castrejón-Pita, Alfonso Castrejón-Pita, Guadalupe Huelzs, J. Antonio del Río

Universitat de Barcelona
 

This work presents experimental measurements of the velocity profile of a Maxwell and a newtonian fluid in a tube under periodic forcing. The results were in good agreement with theoretical calculations that predict a monotonic response for the newtonian fluid and a more complex behavior for the maxwellian fluid.

We determined the velocity profiles of the fluid in a tube with two techniques: PIV (Particle Imaging Velocimetry) was used to measure bulk veloctity profiles  and OD (Optical Deflectometry) to determine the velocity profile at the interface liquid-air.