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A three-dimensional Euler-Lagrange model was used to study the distribution of particles in scrubbing-cooling chamber of coal-water-slurry (CWS) entrained-flow gasifier. Comparisons of computational results with experimental data are made. The effects of operating conditions and size grading on the particle number density distribution in chamber is revealed through simulation. The results indicate...
A nonlinear flow reservoir mathematical model is established, and the numerical stimulation program is compiled based on black-oil model, whose purpose is to simulate the fluid flow in ultra-low permeability reservoir. Actual field data is used to make a pilot calculation, and the comparative stimulating results analysis under different nonlinear flow curves and Darcy flow is provided, which has verified...
This paper presents numerical study of droplet dynamics on solid surface using multiphase model of lattice Boltzmann method. This method is an efficient alternative tool for the numerical simulation of multiphase flow. In this paper, we start by describing a choice of interaction potential that reproduces the attraction force between particles together with the varying contact angles on surface by...
In this paper, a novel computational scheme, local whole-information difference scheme (LWDS), was proposed to solve significant pseudo diffusion in recirculating flow zone during numerical simulation. In LWDS, the effect of all of the local around points on the control volume was considered to demonstrate the spatial characteristics of the flow, and the weighted value at each point is adjusted according...
Numerical simulation of the kerosene in a high pressure centrifugal pump was conducted based on viscous N-S equations and multiphase flow. The cause, location and initiation factors of cavitations were investigated. Actual conditions of centrifugal pump were introduced into the numerical simulation. It shows that the simulation results are in good accordance with the actual damage to centrifugal pump...
Aiming at the coupled processes of combustion and decomposition inside a calciner, multiphase species transportation method is adopted to simulate the complex physical and chemical process. With shrink-core reaction model for raw meal, raw meal particle phase is studied by Euler-Euler method. The coupled processes inside calciner are simulated by solving the species transportation equations between...
A mathematical model of the abrasive water-jet (AWJ) nozzle based on the multiphase hydrokinetics was established and the boundary conditions were determined. The liquid-solid flow rule of the cone nozzles with the cylinder section of the pre-mixed AWJ was simulated with the software FLUENT. The results show that the axial velocity and dynamic pressure of the continuous phase in the nozzle is notably...
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