Numerical simulation of flow characteristics for
natural gas hydrate in vertical tube
1. College of Petroleum Engineering, Liaoning Shihua University, Fushun, Liaoning 113001, China; 2. College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun, Liaoning 113001, China
Abstract： To investigate the ideal hydraulic lifting condition of deepwater gas hydrate slurry production pipeline, the parameters of slurry velocity, concentration, particle size and particle density in the production pipeline were divided into 12 groups. Based on the Euler twofluid model in Fluent software, the SIMPLE algorithm and the standard kε turbulence model, the hydrate particles in the pipeline were analyzed to compile UDF, and the proposed scheme was simulated and analyzed. The results show that the relative error between hydrate particle concentration and experimental data is less than 20%, which indicates that the model is feasible. With the increasing of lifting speed and with the decreasing of slurry concentration, particle size and particle density, the hydraulic transportation becomes more favorable. To meet the safety requirements of system and with the consideration of economic factors, the lifting concentration should be 20% with particle size of 0.010.02 m, and the lifting speed and the particle density should be controlled with the ranges of 1.41.8 m·s-1 and 1 0201 190 kg·m-3, respectively.Under the proposed conditions, the ideal lifting situation can be obtained with reliable system.
2018, Vol. 39 
