Viscoelastic transition in transonic flow focusing

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Rubio, A (Author) Other; Galindo Rosales, FJ (Author) FEUP; Vega, EJ (Author) Other; Montanero, JM (Author) Other; Cabezas, MG (Author) Other

Journal

Title: Physical Review Fluids

Vol. 7

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 0 Citations

Scopus

Other information

Authenticus ID: P-00W-WQH

DOI: 10.1103/physrevfluids.7.074201

Abstract (EN): We find and study the viscoelastic transition in transonic flow focusing when polymers of low molecular weights are dissolved in water at the appropriate concentration. This phenomenon is explained in terms of the coil-stretch transition of the polymers crossing the tapering meniscus, where the airstream produces very large strain rates. The resulting elastic stress stabilizes the flow, reducing the minimum liquid flow rate leading to jetting. As a consequence, we produce jets much thinner and longer than their Newtonian counterparts, which has important consequences at the technological level. We present a scaling analysis to show the role played by the polymer relaxation time and extensional viscosity in the viscoelastic transition.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14