Multi-scale Exploration of MultiPhase Physics In FlowS (MEMPHIS)

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Researchers:

  • Dr Lyes Kahouadji (numerical simulation of multiphase flows using front-tracking and domain decomposition methods)
  • Dr Zhizhao Che (ensemble methods, data assimilation methods, and experiments on droplet impact on falling films)
  • Dr Zhihua Xie (Control volume finite-element multiphase flow simulations on unstructured meshes)
  • Dr Ivan Zadrazil (experiments on stratified-stratifying flow, vertical upwards and downwards annular flows)
  • Dr James Percival (numerical simulations of two-phase flow past a cylinder)
  • Mr Idris Adebayo (experiments on droplet impact on flowing films)
  • Mr Habib Abubakar (stability of bubbles rising in vertical tubes)
  • Ms Renad Ismail (experiments on droplet impact on flowing films)
  • Ms Yan Wang (numerical simulations of three-phase slug flows)
  • Mr Thomas Ewers (analysis and simulation of downwards annular flows)

Project Manager:

  • Dr Huma Lateef

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TMF: Transient Multiphase Flows

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Manufacturing with light: surface wrinkling and frontal photopolymeriation

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Numerical simulation of crude oil fouling in heat exchanger units

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The effect of surfactants on flooding phenomena in vertical counter-current gas-liquid flows

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Thin film flows over spinning discs with chemical reactions

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Multi-scale analysis of flows through nanochannels

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Typically, fluid flow is described by the solutions to the Navier-Stokes equations, such as Hagen-Poiseuille flow through cylindrical pipes. However, these first of all do not take interactions between the fluid and the pore wall into account. Secondly, the NS equations are generally solved for incompressible Newtonian fluids which follow a linear stress-strain relation.

We aim to find a description of fluid flow through nanochannels based on the continuum approach which nevertheless incorporates small-scale effects and can be generalised for different types of fluids. The following step is to look into solute rejection mechanisms, which factors contribute to them on a molecular level and finding a coherent description of such processes.

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Stability of rising bubbles in vertical pipes

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Jet-mixing of liquid-liquid flows in horizontal pipes

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Modelling and simulation of downwards annular flows

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Gel deformation induced by ultrasound-driven bubble oscillations

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Liquid-liquid flows in horizontal and near-horizontal pipes

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Surfactant-assisted superspreading of aqueous sessile drops on hydrophobic substrates: MD simulations and molecular design

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Development of wax-inhibitors

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The aim of this study is to develop a framework of approaching the wax control chemical development in a systematic way. This will be done through a three-pronged approach: computer-aided molecular design; chemical synthesis and testing; embedding the molecular-scale chemistry into a continuum-scale model for simulations at the macro-scale. Coarse-grained molecular dynamics (MD) and the computational fluid dynamics (CFD) continuum-level simulation will be used to guide the synthesis of a new chemical, which will be tested against chemical systems from the oilfields. The MD-synthesis-testing steps will be iterative, culminating in the development of an effective wax inhibitor. Information from the MD step will be passed to the continuum-level modeling step for the development of simulation tools of wax formation/inhibition in flow processes, which is my main focus area.

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