Dubois-Violette

MP VaUgnat, S Villette, J Li, R Barberi, R Bartolino, E Dubois-Violette, AM Cazabat. Phys Rev Lett 77 1994-1997, 1996. 

Fig. 51. Neutron spin echo spectra obtained from the star 18 IIAA. The lines are a result of a fit with the dynamic structure factor calculated by Dubois Violette and de Gennes [34]. (Reprinted with permission from [150]. Copyright 1987 The American Physical Society, Maryland)...

E. Dubois-Violette, P. G. deGennes and L. Monnerie, to appear in J. chim. phys. 

Dubois-Violette, E., Geny, F., Monnerie, L., Parodi, O., J. Chem. Phys. 

As Er is increased further to around 10 in 8CB (at 37°C), there is a roll-cell instability involving (a) a periodic modulation of the director field in the vorticity direction and (b) a cellular flow. The rolls cells are parallel to the primary flow direction (Pieranski and Guyon 1974) (see Fig. 10-19). These transitions in the director field have been both predicted from the Leslie-Ericksen theory (Manneville and Dubois-Violette 1976 Larson 1993) and... 

Drazin PG, Reid WH (1981). Hydrodynamic Stability, Cambridge University Press, Cambridge. Dubois-Violette E, Durand G, Guyon E, Manneville P, Pieranski P (1978). Solid State Phys (Suppl) 14 147. 

Dubois-Violette, Monnery, Geny et al. and Taran have developed a theory of PL for the rotational-isomeric tetrahedral lattice chain model A rela-... 

Manneville, P. Dubois-Violette, E. Shear flow instability in sheared nematic liquids theory steady simple shear flows. J. Phys. Paris 1976,37,285-296. 

Figure 6.10. Physical meaning of the a terms of Ericksen-Leslie coefficients. (Modified from Dubois-Violette et al., 1978.)...

Dubois-Violette, E., Durand, G., Guyon, E., Manneville, P. and Pieranski, P., 1978, Liquid Crystals, ed. L. Liebert, New York Academic Press. 

We shall now outline the theory of electrohydrodynamic instabilities proposed by Helfrich and extended by Dubois-Violette, de Gennes and Parodi and Smith et We consider a nematic film of thickness d lying in the xy plane and subjected to an electric field along z. Let the initial unperturbed orientation of the director be along x, and let there also be a stabilizing magnetic field along the same direction. We consider a bend... 

The situation is altered profoundly in the case of a nematic because of its anisotropic transport properties. Dubois-Violette was the first to give an approximate theoretical treatment of thermal convection in a planar (homogeneously aligned) nematic and to show by consideration of torques that such a system will be unstable against cellular flow when the film is heated from below if > 0, or when it is heated from above if < 0, where = K —K is the anisotropy of thermal conductivity (which is positive for all known nematics )- Dubois-Violette also showed that the critical temperature gradient fi (=ATJd) should be much less than that... 

The cholesteric pitch is altered around the singular line where N is an integer. The pattern for i = j is shown in fig. 4.2.4. Again, the energies and interactions in the one-constant approximation are the same as for nematic twist disclinations. A somewhat more elaborate treatment of this model has been presented by Scheffer and the effect of elastic anisotropy has been investigated by Caroli and Dubois-Violette. ... 

E. Dubois-Violette, E. Guyon, I. Janossy, P. Pieranski and P. Manneville,... 

Dubois-Violette, E., Durand, G., Guyon, E., Manneville, P., Pieranski, P. Instabilities in nematic liquid crystals. In Liebert, L. (ed.) Liquid Crystals, pp. 147-208. (Ehrenreich, H., Seitz, F., Turnbull, D. (eds.) series Solid State Physics), Academic Press, New-York, (1978). 

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