Direct numerical simulation of mass transfer in bubbly flows. (30th August 2018)

• Record Type: Journal Article
• Authors: Deising, D.; Bothe, D.; Marschall, H.
• Is Part Of: Computers & fluids. Volume 172(2018)
• Page Start: 524
• Page End: 537
• Publication Date: 2018-08-30
• Subjects: Algebraic Volume-of-Fluid -- Interfacial species transfer -- Adaptive mesh refinement -- Rising single bubbles -- Sherwood correlation; Fluid dynamics -- Data processing -- Periodicals; 532.050285
• DOI: 10.1016/j.compfluid.2018.03.041
• Languages: English
• ISSNs: 0045-7930

Abstract

Highlights: Extensive parameter study of species transfer from single rising bubbles. Deduction of improved Sherwood correlation for interfacial species transfer. Adaptive mesh refinement, load balancing and multi-criterion refinement. Improved algebraic Volume-Of-Fluid method using iso-surface reconstruction. Fux-based window technique/moving reference frame. Abstract: Process design, especially in the chemical industry, often requires a detailed understanding and accurate quantification of interfacial mass transfer. Experimental investigations, however, are often infeasible as required measurement quantities and locations are inaccessible. Thus, Direct Numerical Simulations (DNS) have become a viable tool for the detailed study of mass transfer processes. This paper presents a numerical modelling framework for the simulation of dilute species transfer based on an algebraic Volume-of-Fluid method, aiming at the deduction of an improved closure model for interfacial species transfer from single rising bubbles. To this end, the Continuous Species Transfer (CST) model [18] and state-of-the-art high performance computing techniques are employed.