Affiliation:
1. Helmholtz-Zentrum Dresden-Rossendorf Institute of Fluid Dynamics Bautzner Landstraße 400 01328 Dresden Germany
2. Duke University Department of Civil and Environmental Engineering 27708 Durham NC USA
Abstract
AbstractRecent experimental results reveal that with rising concentration of surfactants, the generated bubble‐induced turbulence (BIT) increases as well, although the bubbles rise slower. Herein, it is shown that this phenomenon has not be considered so far in the standard Reynolds‐averaged Navier‐Stokes (RANS) modeling for BIT, using the Ansatz with source terms added to the transport equation of turbulent kinetic energy and dissipation, respectively. Some problematic issues related to the common concepts for closure of the liquid‐phase turbulence kinetic energy equation are also discussed. Furthermore, this issue is demonstrated by simulating the experiments using two‐fluid approach.
Subject
Industrial and Manufacturing Engineering,General Chemical Engineering,General Chemistry
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