Production and relaxation cross sections for the shear viscosity Senftleben–Beenakker effect. I. Formal expressions and their coupled‐states and infinite‐order–sudden approximations for atom–diatom systems

1979 ◽  
Vol 71 (1) ◽  
pp. 415-425 ◽  
Author(s):  
W.‐K. Liu ◽  
F. R. McCourt ◽  
D. E. Fitz ◽  
Donald J. Kouri
Keyword(s):  
Cross Sections ◽  
Shear Viscosity ◽  
Infinite Order

Modelling of Shear Viscosity Behavior and Extrusion through Dies for Rubber Compounds

1987 ◽  
Vol 60 (2) ◽  
pp. 337-360 ◽  
Author(s):  
James L. White ◽  
Yeh Wang ◽  
Avraam I. Isayev ◽  
Nobuyuki Nakajima ◽  
Frederick C. Weissert ◽  
...  
Keyword(s):  
Cross Sections ◽  
Shear Viscosity ◽  
Flow Analysis ◽  
Elongational Flow ◽  
Extrudate Swell ◽  
Pressure Losses ◽  
Analysis And Design ◽  
Rubber Compounds ◽  
Viscosity Behavior ◽  
Active Research

Abstract This paper marks a first effort to develop a fundamental basis for die flow analysis and design for rubber compounds. We have accomplished a modelling of the shear viscosity function and its application to one- and two-dimensional shearing in die cross sections. There are major limitations in what we have done, much of which is apparent even in the early work of Mooney. In particular, we have not considered (i) slip phenomena on die walls, (ii) die entrance and exit pressure losses associated with converging and diverging dies, nor (iii) extrudate swell. We have an active research in our laboratories investigating these problems. In the future, we are seeking to generalize the procedures described in this paper to more complex die designs. Inclusion of entrance and exit effects and rigorous analysis of coathanger dies requires the handling of elongational flow contributions, a still unsolved problem.

Helium Atom Scattering from C2H6, F2HCCH3, F3CCH2F and C2F6 in Crossed Molecular Beams

1997 ◽  
Vol 52 (10) ◽  
pp. 695-701
Author(s):  
Markus Hammer ◽  
Wolfhart Seidel
Keyword(s):  
Cross Sections ◽  
Infinite Order ◽  
Virial Coefficients ◽  
Molecular Beams ◽  
Helium Atom Scattering ◽  
Helium Atoms ◽  
Atom Scattering ◽  
Sudden Approximation ◽  
Scattering Systems ◽  
Macroscopic Parameters

Abstract Rotationally unresolved differential cross sections were measured in crossed molecular beam experiments by scattering Helium atoms from Ethane, 1,1-Difluoroethane, 1,1,1,2-Tetrafluoroethane and Hexafluoroethane. The damping of observed diffraction oscillations was used to extract anisotropic interaction potentials for these scattering systems applying the infinite order sudden approximation (IOSA). Binary macroscopic parameters such as second heterogeneous virial coefficients and the coefficients of diffusion and viscosity were computed from these potentials and compared to results from macroscopic experiments.

Close‐coupled and coupled‐states calculation of shear viscosity SBE cross sections for the H2–He system

1982 ◽  
Vol 76 (10) ◽  
pp. 5112-5127 ◽  
Author(s):  
W.‐K. Liu ◽  
F. R. McCourt ◽  
D. E. Fitz ◽  
D. J. Kouri
Keyword(s):  
Cross Sections ◽  
Shear Viscosity

Production and relaxation cross sections for the shear viscosity SBE. II. IOSA results for the N2–He system

1981 ◽  
Vol 75 (3) ◽  
pp. 1496-1508 ◽  
Author(s):  
W.‐K. Liu ◽  
F. R. McCourt ◽  
D. E. Fitz ◽  
D. J. Kouri
Keyword(s):  
Cross Sections ◽  
Shear Viscosity
Sign in / Sign up

Export Citation Format

Share Document