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Pressure Tap Influence on the Flow of Viscoelastic Fluids in a Microfluidic Channel

Title
Pressure Tap Influence on the Flow of Viscoelastic Fluids in a Microfluidic Channel
Type
Article in International Conference Proceedings Book
Year
2020-08-21
Conference proceedings International
Pages: 177-180
7th Iberian Meeting on Rheology (IBEREO) of the Spanish-Group-of-Rheology (GER) and Portuguese-Society-of-Rheology (SPR)
Univ Porto, Porto, PORTUGAL, SEP 04-06, 2019
Other information
Authenticus ID: P-00T-YG8
Resumo (PT):
Abstract (EN): How does flow inside a microfluidic device behave when passing by a pressure tap? Will its natural state be disrupted by any means? We seek to answer these questions and assess the consequences (if any) of attaching pressure taps to microchannels. To do so, streakline photography was performed for flow patterns visualisation in the close proximity of different types of pressure taps, using `long' exposure times. Both a Newtonian and a viscoelastic fluid were tested, in order to observe the interplay of inertio-elastic effects near the intake of the pressure taps. The microdevices were made out of PDMS and the main flow channel, to which the pressure taps were attached, had a cross-section of 270x100 mu m. Elastic effects were observed in the form of reduced streak-line curvature near the taps intake and increased vortex formation.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 4
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