CFD and lower order mechanistic models for gas-liquid flow in NETmix: Pressure drop and gas hold-up

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Marrocos, PH (Author) Other; Fernandes, IS (Author) Other; Pituco, MM (Author) Other; Lopes, JCB (Author) Other; Madalena M. Dias (Author) FEUP; Santos, RJ (Author) Other; Vilar, VJP (Author) Other

Journal

Title: Chemical Engineering Science

Vol. 284

ISSN: 0009-2509

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

Other information

Authenticus ID: P-00Z-91K

DOI: 10.1016/j.ces.2023.119478

Abstract (EN): This study evaluates a 2D two-phase computational fluid dynamics (CFD) model, based on the Volume-of-Fluid approach, to represent the air-water co-current downwards flow inside the micro/meso structured static mixer, NETmix. The 2D model was suitable for representing properties more reliant upon the shape and size of the bubbles, such as the gas hold-up. Additionally, it was measured the two-phase pressure drop associated with the NETmix, through which it was observed a capability of the NETmix to operate at a lower pressure drop than some common static mixers. Using both CFD and experimental measurements, a method for predicting the gas hold-up and a mechanistic model to predict the two-phase pressure drop in static mixers were proposed, both based on previous works. A maximum deviation from the reference data of 7.2% and 17.0% was found between the predictions of the proposed gas hold-up method and the two-phase pressure drop, respectively.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11