An insight into the investigation of partition characteristics of flow fields based on chaos fractal theory in a jet impingement–negative‐pressure reactor

The jet impingement–negative‐pressure reactor (JI‐NPR) is a continuous and efficient technology designed to remove ammonia without clogging. Prior research has discovered that the changing movement of a porous jet impinging under negative‐pressure conditions is distinguished by a more pronounced distribution over many regions. This study utilizes the CFD numerical simulation method in conjunction with the MATLAB platform to investigate the fractal characteristics of water phase distribution, velocity, turbulence intensity, vortex amount, and other parameters at various locations. The fractal dimension is employed as a criterion to analyze the chaotic characteristics of this multi‐area distribution phenomenon. The study demonstrates that the effectiveness of deamination removal can be enhanced by quantitatively assessing the complex characteristics in the fluid flow using the chaotic fractal theory, which facilitates the identification of the ideal parameter settings. The optimal deamination effect can be achieved in the reactor when the jet velocity is set to 3.45 m/s and the negative pressure is maintained at 20 400 Pa.