To read about the implemented models for driftFluxFoam solver, refer to. The available viscosity models for this solvers are Bingham plastic, plastic and slurry viscosity model. The solver is based on Pimple algorithm and can handle larger time steps and does not reply on under-relaxation. The driftFluxFoam is a transient solver for two incompressible fluids treated as a single mixture. The subscripts c, d, and m stands for continuous, dispersed and mixture phase, respectively. The two phases are defined by following equation:Īnd the velocity of the mixture is defined by: In other words, the two-phases in drift flux model are treated as a single fluid mixture in which the velocity, pressure and the density of individual phases are replaced by a single property of the mixture. In this model, only one continuity equation and one momentum equation are solved for the mixture. Speciality was that the dredging was done while maintaining position using the Roxane Z Dynamic Positioning system (DP2), allowing more flexibility in the vessel movements while dredgingĪfter succesfully dredging all material, the vessel demobilized and our equipment and operators travelled back to our base in The Netherlands.Sludge can be considered as a two-phase mixture in which the water is the continuous phase, and the sludge is the dispersed phase.ĭrift flux model assumes that the primary source of slip between the phases is gravitational settling of the dispersed phase.ĭriftFluxFoam solver is developed by Brennan’s PhD thesis based on mixture model approximation (former settlingFoam). Offshore sand was dredged to clear an installation and discharged via the DOP 250 booster and discharge pipeline. DPS mobilized several truckloads with our DOP 250 dredge pump in booster set up, hydraulic powerpacks and heavy duty jet water pump and discharge pipelines.Īfter arrival of the trucks in the port of mobilization our colleagues assisted the clients vessel crew to install the complete dredging spread on board the vessel, after different test runs the vessel sailed out and the dredging commenced. Our client Jifmar Offshore Services was in need of additional dredging equipment and operators for his offshore dredging project offshore Brittany in France.
Offshore dredging Offshore Brittany, France
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