Browsing NTNU Open by Author "Skartlien, Roar"
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A DPD study of asphaltene aggregation: The role of inhibitor and asphaltene structure in diffusion-limited aggregation
Skartlien, Roar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2017)The kinetic effects of DBSA (dodecyl benzene sulfonic acid) and a linear amphihile on asphaltene aggregation was investigated, using dissipative particle dynamics molecular simulations. The simulation results indicated ... -
Effects of polymer adsorption on the effective viscosity in microchannel flows: phenomenological slip layer model from molecular simulations
Palmer, Teresa Lynne; Espås, Thomas Asadi; Skartlien, Roar (Journal article; Peer reviewed, 2018)Molecular simulations (Dissipative Particle Dynamics - DPD) were used to quantify the effect of polymer adsorption on the effective shear viscosity of a semi-dilute polymer solution in microchannel Poseuille flow. It is ... -
Electrocoalescence of water in oil emulsions: a DPD simulation study and a novel application of electroporation theory
Skartlien, Roar; Simon, Sebastien Charles; Sjøblom, Johan (Journal article; Peer reviewed, 2019)Pore formation in a surfactant laden oil film between two aqueous electrolyte layers in a DC field was studied using DPD (Dissipative Particle Dynamics molecular simulation). This setting represents the final stage of an ... -
Emulsions in external electric fields
Sjøblom, Johan; Mhatre, Sameer; Simon, Sebastien Charles; Skartlien, Roar; Sørland, Geir (Peer reviewed; Journal article, 2021)Water is co-produced with crude oils, generally in the form of water-in-crude oil emulsions. The oil and water phases need to be separated before export. Separation is performed in gravity separators with the addition of ... -
On the interfacial roughness scale in turbulent stratified two-phase flow: 3D lattice Boltzmann numerical simulations with forced turbulence and surfactant
Skartlien, Roar; Sollum, Espen; Fakharian, F; Palmer, Teresa (Journal article; Peer reviewed, 2015)Numerical 3D simulations of turbulent, stratified two-phase shear flow with a surfactant laden interface were used to test and develop a phenomenological interfacial roughness scale model where the energy required to deform ... -
Reduction of the effective shear viscosity in polymer solutions due to crossflow migration in microchannels: Effective viscosity models based on DPD simulations
Palmer, Teresa Lynne; Baardsen, Gustav; Skartlien, Roar (Journal article, 2017)Molecular dynamics simulations (dissipative particle dynamics–DPD) were developed and used to quantify wall-normal migration of polymer chains in microchannel Poseuille flow. Crossflow migration due to viscous interaction ...