Numerical Simulation of the Hydrogen Dispersion Behavior by a Parallel Characteristic Curve Method

Abstract

A parallel characteristic curve method is applied in domain decomposition system to simulate the dispersion behavior of hydrogen in this work. The characteristic curve method is employed to approximate the Navier-Stokes equations and the convection diffusion equation, and the feasibility of solving complex multicomponent flow problems is demonstrated by the numerical simulation of hydrogen dispersion in a partially open space. An analogy of the Boussinesq approximation is applied and numerical results are validated by comparing them with the experimental data. The dilution effect of ventilation is investigated. The transient behavior of hydrogen and the process of accumulation in the partially open space are discussed.

Large Scale Simulation of Hydrogen Dispersion by a Stabilized Balancing Domain Decomposition Method

“…In Figure 5, where 0% indicates that the entire volume is occupied by air and 100% represents the opposite, it can be seen that the current numerical results of all 4 sensors agree with the experimental data very well. Due to the acceleration and dilution of air, some oscillations are viewed at sensor 2 and sensor 3 (located at the top of the ventilation model) after 150 s. Compared with numerical results in [1,8,30], the current numerical results are more stable and closer to the experimental data and thus are more reliable.…”