Three-dimensional numerical modeling of turbulent single-phase and two-phase flow in curved pipes
Article
Xin, RC, Dong, ZF, Ebadian, MA. (1996). Three-dimensional numerical modeling of turbulent single-phase and two-phase flow in curved pipes
. American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, 326 227-233.
Xin, RC, Dong, ZF, Ebadian, MA. (1996). Three-dimensional numerical modeling of turbulent single-phase and two-phase flow in curved pipes
. American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, 326 227-233.
In this study, three-dimensional single-phase and two-phase flows in curved pipes have been investigated numerically. Two different pipe configurations were computed When the results of the single-phase flow simulation were compared with the experimental data, a fairly good agreement was achieved A flow-developing process has been suggested for single-phase flow, in which the turbulence is stronger near the outer tube wall than near the inner tube wall. For two-phase flow, the Eulerian multiphase model was used to simulate the phase distribution of a three-dimensional gas-liquid bubble flow in curved pipe. The RNG/k-ε turbulence model was used to determine the turbulence field An inlet gas void fraction of 5 percent was simulated The gas phase effects on the liquid phase flow velocity have been examined by comparing the results of single-phase flow and two-phase flow. Our findings show that for the downward flow in the U bend, the gas concentrates at the inner portion of the cross section at φ= π/18 - π/6 in most cases. The results of the phase distribution simulation are compared to experimental observations qualitatively and topologically.
