Direct Numerical Simulation Of Gas-Liquid Stratified Flow In Pipe

Solved the Level Set equation with 5th order upwind deflective difference scheme, TVD integrate average method, and 5th order WENO difference scheme. Comparing the results, approves that the results are more precise, the computational speed is quicker with 5th order upwind deflective difference scheme, and the structure of this scheme is simple. Solved the incompressible N-S equations in primitive variable form in wide grid system with high precision difference scheme, not only the results are more precise, the computational speed is quicker, but also occupies less computer resources. Considering the initial condition and the boundary condition of conduit flow, simulated the gas-liquid stratified flow in pipe by solving the incompressible N-S equations in primitive variable form and the Level Set equation. The velocity distribution curve by numerical computation near the wall is the same as the Blasius theoretical curve, and it approved that the numerical simulative solution is correct. Obtained the time dependent interface and pressure distribution, but also obtained the time dependent velocity distribution on the cross section. It is a new way to study the gas-liquid two-phase flow.