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Dissolution of surfactant liquid crystals is an important process both at the manufacturing stage of surfactant based formulated products and during their use. Dissipative particle dynamics simulations were employed to study the production of surfactant-oil-water systems under both temperature and water quenches. Upon the dissolution of a high concentration lamellar phase surfactant, wormlike micelles are formed, which differ from the spherical micelles produced at the same concentration with a temperature quench. The surfactant molecules have a tendency to remain within their initially formed lamellar phase sheets and just rearrange into wormlike micelles. When a hydrophobic additive (oil) is added to the initial system, longer cylindrical micelles are formed, with the creation of some spherical micelles under dissolution. These micelles detach from the long cylinders as a result of their natural oscillations.

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 98 Helical mixer designs were screened using STAR-CCM+ and HEEDS package  Experimental validation was performed using ERT and torque measurements  Statistical analysis revealed key design features affecting mixer performance

A c c e p t e d M a n u s c r i p t  SMX static mixers were studied using Positron emission particle tracking (PEPT)  In the mixer the axial velocity component was not influenced by fluid rheology  No back mixing was observed  Radial velocities were not affected by rheology  Radial and axial velocities were strongly influenced by the mixer geometry