Aggregation of Surfactant in various Solvents. We extended the standard DPD simulations for estimating the repulsion parameter for different solvent systems in order to identify the interaction parameter for the surfactants in both organic and aqueous phases with oil and water being the respective implicit solvents. Figure ) shows the results of such a simulation where the selfassembling behaviors of DDA, Brij-35 and the mixture were studied with dodecane as implicit solvent. Similar studies with water as the implicit solvent are presented in Figure .