... approaches frequently used to model pressure drop in a granular layer. These are a model of a hydraulic circuit element, a Lockcart–Martinelli model, and a generalization of the Darcy–Forchheimer model. A new model, representing a generalization of the gas dynamics equations to a two-phase flow, is proposed. The results of the considered models verification by two groups of experimental data obtained at different facilities are presented. The experiments employed granular beds with a height of 50 mm,...
Теги: calculation models comparison , experimental data , granular bed , mass velocity , pressure gradient , steam-water flow , drops , gas dynamics , hydraulic equipment , pressure drop , velocity , forchheimer models , gas dynamics equations , granular layer , hydraulic ciTairov E.A., Khan P.V. Hydraulic and gas-dynamic models of a steam-water mixture flow in a granular bed // Journal of Physics: Conference Series. Vol.1382. No.1. ID: 012101. 2019. DOI: 10.1088/1742-6596/1382/1/012101 The paper presents a comparative analysis of the hydraulic and gas-dynamic models of a steam-water mixture flow through a granular bed. The analysis is carried out using experimental data obtained at an inlet pressure of 0.6 - 15.5 MPa, flow quality of 0.002 - 0.3, and mass velocity...
Теги: gas dynamics , hydraulic models , mixtures , packed beds , petroleum refining , quality control , steam , analytical integration , comparative analysis , constitutive relations , granular beds , inlet pressures... smoothed particle hydrodynamics method. A model of isenthalpic flow of vapor–water mixture in a fixed bed of solid particles is considered is this study. The mixture expansion process is considered to be polytropic. Similarly to the known problem of gas dynamics of a granular bed, an analytical relationship for calculation of a critical mass velocity was obtained. The results of the calculation based on the analytical and numerical models were compared with the experimental data and agreement between ...
Теги: analytical models , gas dynamics , hydrodynamics , mixtures , numerical methods , numerical models , analytical and numerical models , analytical approach , critical two-phase flows , expansion process , numeri
