Counter-rotating TSEs

Counter-rotating TSEs are applied in PVC compounding and processing. This concept has been used by Farrel for mbber mixing and they call this aggregate the Farrel Continuous Mixer. ... 

Tld Tim viscosity of dispersed and matrix ICRR intermeshing counter-rotating TSE... 

ICRR intermeshing, counter-rotating TSE PDB positively deviating blends... 

The uniform flow at time t = 0 rapidly changed into Stokes flow around the obstacle. By / 100 psec a pair of counter-rotating eddies had developed... 

Fig. 10.27 Devolatilization of a 42% polychloroprene-58% CCI4 in a JSW TEX 65 counter rotating, intermeshing TSE. (a) The effect of increasing the number of vent ports at Q = 30 kg/h and N = 125 rpm. (b) The effect of decreasing Q/N ratio, at constant Q. [Reprinted by permission from T. Sakai and N. Hashimoto, Application of Novel Counter-rotating Intermeshed Twin Extruder for a Degasing Operation. SPE ANTEC Tech Papers, 32, 860 (1986).]...

T. Li and I. Manas-Zloczower, A Study of Distributive Mixing in Counter-rotating Twin Screw Extruders, Int. Polym. Process., 10, 314—320 (1995). 

Foster, R.W. Lindt, J.T. Bubble free devolitaliza-tion in counter-rotating non-intermeshing twin screw extruders. Polym. Engng. Sci. 1990, 30 (7), 424-435. 

The rotating wave approximation (RWA) is a useful simplification [465] which contains most of the features of coherent excitation it consists in assuming that only exp(iwt) terms are present (counter rotating terms are neglected), in which case the amplitudes Oi(t) and o/(t) experience only slow oscillations at the frequency Aw, according to the differential equations ... 

Co- or counter-rotating and elongation rates and adiabatic T-gradient were computed for the conveying and kneading sections. A 3D modeling of flow in fuU conveying screw elements of either a CORI Kajiwara et al. 1996... 

A new SD Command centre was established in the counter-rotating spaceport, outside Rubra s influence. He couldn t strike at that like he could the starscrapers. The possessed technicians who reactivated the network were convinced they had made it independent, a system which only Kiera and her newly installed codes could control. 

W. Chinsirikul, T. C. Hsu, and I. R. Harrison, Liquid crystalline polymer (LCP) reinforced polyethylene blend blown film Effects of counter-rotating die on fiber orientation and film properties, Polym. Engr. and Sci., vol. 36, No. 22, 2708-2717, November (1996). 

Fig. 4. Counter-rotating screws (a) fully intermeshing (b) partially intermeshing and (c) nonintermeshing (tangential).t...

Bouilloux, A., Macoscko, C.W., and Kotnour, T. (1991) Urethane polymerization in a counter-rotating twin-screw extruder. Ind. Eng. Chem. Res., 30, 2431-2436. 

Janssen, L.P.B.M. (1991), Mixing in counter rotating twin screw extruders, in C.Rauwendaal, Ed., Mixing in Polymer Processing, (Marcel Dekker). [306] Jaraiz-M, Levenspiel, O. and Fitzgerald T. (1983), Chem.Eng.Sci.38, 107-114. [97]... 

Sakai, T., Hashimoto, N., Kobayashi, N. Experimentai Comparison Between Counter-Rotation and Co-Rotation on the Twin Screw Extrusion Performance, Proceedings of SPE Antec, Los Angeies, 1987, p. 146- 151... 

Similar to the PIP, the Hamiltonian [Eq. (52a)] of a periodic pulse shows an infinite number of effective RF fields with both x and y components of the scaling factors X a and the phases 0na. The periodic pulse, however, acquires a different symmetry as that of the PIP. From Eq. (52c) and = ana, it follows that the scaling factor Xm, is symmetric in respect to the sideband number n, while the phase 6na is anti-symmetric according to Eq. (51c). These symmetries seem to be a coincidence arising from the mathematical derivations. As a matter of fact, they are the intrinsic natures of the periodic pulse. Considering the term f x i)Ix for instance, any Iy component created by the rotating field denoted by a> must be compensated at any time t by its counter-component oj n in order to reserve the amplitude modulated RF field. 

Cruz C, Detwiler C, Nesthus T, Boquet A. A Laboratory Comparison of Clockwise and Counter-clockwise Rapidly Rotating Shift Schedules, Part I. Sleep. Oklahoma City Civil Aerospace Medical Institute, Federal Aviation Administration, 2002. 

Fig. 10.17 The counter- and co-rotating thin-flight, open C-shaped channels used in the three-dimensional FEM study of Katziguara et al. (32). The two-screw configurations are identical except for the sense of rotation. [Reprinted by permission from T. Katziguara, Y. Nagashima, Y. Nakano, and K. Funatsu, A Numerical Study of TSEs by 3-D Flow Analysis - Development of Analysis Technique and Evaluation of Mixing Performance for Full Flight Screws, Polym. Eng. Sci., 36, 2142 (1996).]...

Now we have exactly the same kind of data we have with States mode acquisition cosine modulation in t for the real FID and sine modulation in ti for the imaginary FID. In I2 we can equate Mx with the real part and My with the imaginary part, so that in each case we have Mx = —sin(f2bD) and My = cost f2b/2). This represents a vector starting on the y axis at t2 = 0 and rotating counter clockwise (positive offset 2) at the rate of f2b rad s-1. Once these rearrangements have been made in the computer, the data is processed just like States data, with a complex Fourier transform in t. ... 

FIGURE 10.10 Presence of trailing vortices (Rushton turbine), (a) Turbulent kinetic energy (impeller center plane impeller rotation counter-clockwise), white highest level, black lowest level, (b) Z-vorticity (r/T = 0.165 impeller rotation from left to right) (from Ranade et o/., 2001a). Reproduced in colour plate section between pages 210 and 211. 

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