Disinfection characteristics of an advanced rotational hydrodynamic cavitation reactor in pilot scale

Abstract

Graphical abstract

Multi-objective optimization of the cavitation generation unit structure of an advanced rotational hydrodynamic cavitation reactor

“…2 . Based on the experience derived from our previous experimental and numerical studies [26] , [38] , [43] , [44] , [15] , [45] , [46] , [40] , the basic values and suitable ranges utilized in the CCD for the four design variables were shown in Table 1 .

Fig.

…”

“…Hydrodynamic cavitation reactors (HCRs) mechanically generate the HC phenomenon, and the effectiveness of HC technology is therefore directly dependent on the performance of HCRs [15] . In accordance with the mechanical structure, HCRs can be categorized into non-rotational and rotational [16] .…”

“…To this, we herein provide a multi-objective optimization on the CGU structure of the representative ARHCR [38] , [15] , [45] , [46] by combining genetic algorithm (GA) and CFD for the first time. The chosen objectives were to minimize the shaft power (standing for energy consumption) and to maximize the cavitation generation.…”

Application of Thermal and Cavitation Effects for Heat and Mass Transfer Process Intensification in Multicomponent Liquid Media

“…To a certain extent, such an approach has been valid to date, although it has been determined that at the maximum compression stage, the vapor-gas medium temperature inside the cavitation bubble exceeds 5000 K, and the pressure increases up to 1000 MPa [16][17][18]. It is assumed that the thermal energy released in the bubble volume is sufficient for the excitation, ionization, and dissociation of water vapor molecules and gases present in the bubble, the formation of free radicals, acceleration by 5-6 orders of magnitude of the rates of gas-phase chemical reactions [19][20][21], and even initiation of nuclear fusion reactions in cavitation bubbles [22,23]. That is, under certain conditions, various physical or chemical processes can be initiated in local zones of the liquid while concentrating energy to abnormally high values.…”

“…Energies 2021, 14, x FOR PEER REVIEW 2 of 19 gas-phase chemical reactions [19][20][21], and even initiation of nuclear fusion reactions in cavitation bubbles [22,23]. That is, under certain conditions, various physical or chemical processes can be initiated in local zones of the liquid while concentrating energy to abnormally high values.…”