Rheology of concentrated granular suspensions undergoing squeeze flow
S. Mascia and D. I. Wilson
This paper reports experimental and modeling work on biaxial extension of three highly filled microcrystalline cellulose suspensions employing squeeze flow with lubricated plates. The squeeze flow data explored both the initial compaction of the material before yield and subsequent flow rate dependa ... [J. Rheol. 51, 493 (2007)] published Tue May 1, 2007.
Shear induced normal stress differences in aqueous foams
Vincent Labiausse, Reinhard Hohler, and Sylvie Cohen-Addad
A finite simple shear deformation of an elastic solid induces unequal normal stresses. This nonlinear phenomenon, known as the Poynting effect, is governed by a universal relation between shear strain and first normal stresses difference, valid for nondissipative isotropic elastic materials. We prov ... [J. Rheol. 51, 479 (2007)] published Tue May 1, 2007.
Microrheology of viscoelastic fluids containing light-scattering inclusions
Catalina Haro-Perez, Efren Andablo-Reyes, Pedro Diaz-Leyva, and Jose Luis Arauz-Lara
The microrheology of viscoelastic fluids containing light-scattering inclusions is measured by depolarized dynamic light scattering (DDLS) from optically anisotropic spherical colloidal probes. The anisotropy of the probes allows us to measure both their translational and the rotational mean squared ... [Phys. Rev. E 75, 041505 (2007)] published Mon Apr 30, 2007.
Swinging of Red Blood Cells under Shear Flow
Manouk Abkarian, Magalie Faivre, and Annie Viallat
We reveal that under moderate shear stress (etagamma-dot [approximate]0.1 Pa) red blood cells present an oscillation of their inclination (swinging) superimposed to the long-observed steady tank treading (TT) motion. A model based on a fluid ellipsoid surrounded by a viscoelastic membrane initially ... [Phys. Rev. Lett. 98, 188302 (2007)] published Mon Apr 30, 2007.
Dynamics of DNA tumbling in shear to rotational mixed flows: Pathways and periods
Joo Sung Lee, Eric S. G. Shaqfeh, and Susan J. Muller
The tumbling dynamics of DNA have been examined via experiments and Brownian dynamics (BD) simulations in mixed flows that vary from pure shear to pure rotation. In shear, tumbling pathways and periods agree well with earlier studies; in rotation-dominated flows, a new tumbling pathway is identified ... [Phys. Rev. E 75, 040802 (2007)] published Fri Apr 27, 2007.
Mechanical Energy Absorption of Pectin Films
G. Zsivanovits
Pectin film samples were prepared from HM, LM and amidated pectins produced by CP Kelco and Danisco, with acidic and enzymatic de-esterification and amidation. The swelling of samples were indicated by hydration before the experiments for 24 h by PEG20000 solution, on known osmotic pressure, with Ca ... [AIP Conf. Proc. 899, 832 (2007)] published Fri Apr 27, 2007.