P
Paulo E. Arratia
Researcher at University of Pennsylvania
Publications - 143
Citations - 5551
Paulo E. Arratia is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Newtonian fluid & Reynolds number. The author has an hindex of 40, co-authored 131 publications receiving 4633 citations. Previous affiliations of Paulo E. Arratia include Haverford College & Vanderbilt University.
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Journal ArticleDOI
Elastic Instabilities of Polymer Solutions in Cross-Channel Flow
TL;DR: Tracer and particle-tracking experiments show that molecular stretching produces two flow instabilities: one in which the velocity field becomes strongly asymmetric, and a second in which it fluctuates nonperiodically in time.
Journal ArticleDOI
Rheology of human blood plasma: viscoelastic versus Newtonian behavior.
Mathias Brust,Christof Schaefer,R. Doerr,Lichao Pan,Mike Garcia,Paulo E. Arratia,Christian Wagner +6 more
TL;DR: This work finds a viscoelastic behavior of blood plasma in the pure extensional flow of a capillary breakup rheometer, and shows that the vis coelastic properties of plasma should not be ignored in future studies on blood flow.
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Structure-property relationships from universal signatures of plasticity in disordered solids
Ekin D. Cubuk,Robert Ivancic,Samuel S. Schoenholz,Samuel S. Schoenholz,Danny Strickland,Anindita Basu,Zoey S. Davidson,Julien Fontaine,Jyo Lyn Hor,Yun-Ru Huang,Yijie Jiang,Nathan C. Keim,Nathan C. Keim,K. D. Koshigan,Joel A. Lefever,Tianyi Liu,Xiaoguang Ma,Xiaoguang Ma,Daniel J. Magagnosc,E. Morrow,Carlos Ortiz,Jennifer M. Rieser,Amit Shavit,Tim Still,Ye Xu,Yutao Zhang,Kerstin Nordstrom,Paulo E. Arratia,Robert W. Carpick,Douglas J. Durian,Zahra Fakhraai,Douglas J. Jerolmack,Daeyoon Lee,Ju Li,Robert A. Riggleman,Kevin T. Turner,Arjun G. Yodh,Daniel Gianola,Andrea J. Liu +38 more
TL;DR: A range of particle-based and glassy systems show universal features of the onset of plasticity and a universal yield strain, and a microscopic structural quantity, “softness,” designed by machine learning to be maximally predictive of rearrangements is links structure to plasticity in disordered solids.
Journal ArticleDOI
Undulatory Swimming in Viscoelastic Fluids
Xiaoning Shen,Paulo E. Arratia +1 more
TL;DR: It is found that fluid elasticity hinders self-propulsion, which leads to up to 35% slower propulsion in viscoelastic fluids.
Journal ArticleDOI
Nonlinear elastic instability in channel flows at low Reynolds numbers.
TL;DR: Experimental evidence that flows of viscoelastic polymer solutions in geometries such as a straight pipe or channel can be nonlinearly unstable and can exhibit a subcritical bifurcation and results suggest that any flow of polymer solutions becomes unstable at sufficiently high flow rates.