Multi-Phase Flows CFD Analysis

Multi-Phases flows involve combinations of solids, liquids and gases which interact. Computational Fluid Dynamics (CFD) is used to accurately predict the simultaneous interaction of more than one combination of phases that can be gases, solids or fluids. Typical applications involve sprays, solid particulate transport, boiling, cavitation, state-changes, free surface flows, dispersed multiphase flows, buoyancy problems and mixed species flows. For example, the risks from flow or process-induced vibration excitation of pipework are widely acknowledged in onshore process plants, offshore topsides and subsea facilities. Multiphase flow is particularly of concern because forces can vary considerably with flow regimes, and so relatively small changes in the gas to oil ratio can result in significant changes in dynamic force levels. These forces can be relatively broadband in nature and can therefore excite a range of structural modes.

Esimlab Engineering provides all forms of multi-phase flow analyses ranging from simple particle tracking calculations for industrial applications through to comprehensive design and optimisation of spray equipment and fluid jets. Esimlab engineering team quickly evaluate alternative product and process designs to increase efficiency, reliability, safety and durability in a competitive, time-critical environment.

We Use CFD tools such as Ansys Fluent and Siemens Star-ccm+ , OpenFoam and FEA Tools such as Abaqus,  LS-DYNA and MSC Nastran with combination of very experineced engineers to help our customers in:

  • Fluid Spray Design and Optimisation
  • CFD Simulation of sand erosion in a pipe carrying a multiphase mixture of oil and gas
  • Particulate Tracking and Concentration
  • Improving internal combustion engine emissions and fuel economy performance and with Design and Optimisation Reacting Flows and Fuel Injection system 
  • Simulating Mixing Tank, Mixed Species and Bioreactor Performance
  • Analysis the behavior of moored and/or connected systems, complex offshore, naval and marine structure subject to nonlinear oceanic/sea waves including Free Surface Flows
  • Simulation of water-landing scenarios Unmanned aerial vehicles (UAVs) with coupled use of CFD and FEA to analysis of probabilistic damage and real world performance prediction 
  • CFD simulation of cavitation and its transient effect on structural integrity and Fatigue life coupled with FE

Multiphase Flows types and application

Our Engineers account the interactions between liquids, solids and gases. Each of these varied multiphase challenges requires a different modeling approach with Euler-Euler such as VOF or Euler-Lagrange method such as using Discrete Element Method to capture immersed particles interaction.

Engineering challenge:Dispersed Bubbly FlowDispersed Droplet FlowMixed or Transitional FlowSeparated Flow
Description:Flow of bubbles in a continuous liquid.Flow of liquid droplets in a gas or immiscible liquid.Flows like slug, churnand annular whichinclude bothdispersed and separated elements.Immiscible fluids separated by a clearly defined interface.
Application:Absorbers, aeration, air lift pumps, cavitation, evaporators, flotation, and scrubbers.Spays, absorbers, atomizers, combustors, cryogenic pumping, dryers, evaporation, gas cooling, and scrubbers.Large bubble motion in pipes or tanks, slug catcher.Sloshing in fuel tanks and offshore separator devices, wave motion simulation, boiling, condensation, container filling, centrifuges.
Engineering challenge:Particle-laden FlowPneumatic TransportFluidized Bed
Description:Flow of discrete particles in a continuous gas.Dry bulk materials move through a pipe by air or gas pressure.Gas rising through a bed of particles forms a fluid-solid mixture that exhibits fluid-like properties.
Application:Cyclone separators, air classifiers, dust collectors, and dust-laden environmental flows.Transport of cement, grains, and metal powders.Fluidized bed reactors and circulating fluidized beds used in chemical processes and coal combustion.
Engineering challenge:Slurry FlowsSedimentation
Description:Movement of a liquid carrying dispersed solid particles.Suspended particles settle out from the fluid and come to rest against a barrier.
Application:Slurry transport, hydrotransport and mineral processing.Mineral and waste processing.
Engineering challenge:Particle FlowsThree-Phase Flows
Description:Flow of interacting particulates where there is negligible interaction with surrounding gas or liquid.Gas, liquid and solid in combination of any flow regimes.
Application:Conveyors, hoppers, filling.Deep well, evaporator, gas-oil-water separator, two-phase fluidized bed with solid catalysts.
CFD and FEA consultant at ESimLab

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