Centre National De La Recherche Scientifique

Rhodia Operations

Rhodia Chimie

Universitë De Bordeaux

Université De Bordeaux I

Pierre Guillot

Annie Colin

Cyril Aymonier

Mathieu Joanicot

Galder Cristobal

Max Chabert

Armand Ajdari

Emmanuel Mignard

Samuel Marre

The invention concerns a method whereby: (E1) an inner liquid phase is made to flow in an inner flow member, and an outer liquid phase in an outer flow member, the flow of the inner liquid phase opening within the flow of the second liquid phase; and the temperature and pressure in the contact area between the first and second liquid phases being such that the first and/or second liquid phase is in the supercritical state, (E2) the flow rate of the inner phase and/or outer phase is varied in such a way as to modify the flow profile, and a torque is identified from values of the flow rates of the inner and outer phases, called transition flow rates, from which the modification in the flow profile occurs (from drops to a jet; or from a jet to drops); (E3) from the transition torque identified in step (E2), the value of the interfacial tension between the two inner and outer liquid phases is calculated, or the result obtained is compared to that obtained for another torque in the conditions of steps (E1) and (E2).

Determination of interfacial tensions in supercritical conditions

The interfacial tension between two liquids is determined by: flowing an internal liquid (L) through an internal flow member () and flowing an external liquid (L) through an external flow member (), with conditions being first established such that either droplets (G) of the internal liquid are formed in the external liquid, or a continuous jet of the internal liquid is formed in the external liquid, the continuous jet of the internal liquid then being formed in the external liquid or droplets of the internal liquid then being formed in the external liquid, and deducing therefrom the value of the interfacial tension between these two liquids.

Method and apparatus for determining the interfacial tension between two liquids

Method and installation for determining rheological characteristics of a fluid, and corresponding identifying method

Growing community of inventors

Pessac, France

Pierre Guillot