Haitao Xu and Eberhard Bodenschatz

Max Planck

Description

Haitao Xu and Eberhard Bodenschatz? November 14, 2011, Polymers in Fluids Workshop, Université de Nice Sophia Antipolis, Nice, France ? Effect of Dilute Polymer Solutions on Bulk Turbulence? Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany?

• between counter-rotating


• ppm peo


• fluorescent polystyrene spheres


• turbulence far


• experimental observations

Sujets

• Planck

Informations

• Publié par: pefav
• Nombre de lectures: 11
• Langue: English
• Poids de l'ouvrage: 2 Mo

Extrait

Nov Effect of Dilute Polymer Solutions on e Bulk Turbulence! Haitao Xu and Eberhard Bodenschatz! Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany! mber 14, 2011, Polymers in Fluids Workshop, nUvireisétd eN cie SophiaA ntipolis,N ci,eF arcne !

Outline! Experimental observations of both Eulerian and Lagrangian statistics, including:! • •   Reynolds number (Wi) effect on:! Velocity structure functions!   Polymer concentration effect on: ! Velocity structure functions! Flow structures (Q-R PDF)! Acceleration correlations !

Previous Work! Very few experimental measurements of polymer effect on turbulence far away from boundaries: ! Crawford et al (2002 & 2008):! 0-10 ppm PAM! R !  = 140 - 485! Liberzon et al (2005 & 2006)! 20 ppm PEO, R !  = 50!

Polymers! Polyacrylamide (PAM): 18 x 10 6  amu! Turbulence property at R !  = 350:! Change Reynolds number R !  from 200 to 415,! !!concentration from 0 to 20 wppm.!