CFD Modeling of reactive turbulent flows in supercritical water oxidation reactors: modification of Eddy Dissipation approach for turbulence-chemistry interactions
Résumé
The aim of this work is to evaluate a new model taking into account the interaction between turbulence and chemistry in supercritical water media, in order to describe the oxidation reaction occurring in SuperCritical Water Oxidation (SCWO) processes. The properties of water in its supercritical state is intermediate between that of gas and liquids. As a consequence, usual species transport approaches in liquid or gas phases fail to accurately model the oxidation reaction in SCWO reactors with calculated temperature overprediction. Hence, a truncated eddy dissipation model with truncated turbulence cascade was created and tested on tubular and double shell stirred reactors using ANSYS Fluent software. This model was fitted with measured temperature profiles and degradation yields data and showed good agreement.
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