Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
STUDY OF DIFFERENT METHODOLOGIES FOR INITIATION OF SLUG FLOW USING A LAGRANGIAN SLUG TRACKING MODEL
Submission Author:
Bruna Patricia Naidek , PR
Co-Authors:
Bruna Patricia Naidek, Kaique Leite, Camilla Verbiski Andrade, Cristiane Cozin, Fausto Arinos Barbuto, Rigoberto Morales
Presenter: Bruna Patricia Naidek
doi://10.26678/ABCM.ENCIT2018.CIT18-0528
Abstract
Present in several industrial processes, slug flow is characterized by the intermittent repetition of liquid slugs followed by elongated gas bubbles. The slug tracking model describes this flow pattern and requires the following parameters for flow initiation: superficial velocities of the phases, elongated bubble and liquid slug lengths, as well as the gas void fractions in both the liquid slug and the elongated bubble regions. In this article, five methodologies for flow initialization in a simulator with slug tracking modeling are evaluated. The first methodology consists in data insertion obtained experimentally. The second is a list of distributed values around the standard deviations and mean values of experimental data. The third and the fourth methodologies use data from previous simulations for calculating the new superficial velocities, and the bubble and slug length values, respectively, acquiring the remaining data with the second methodology. The fifth uses bubble and slug lengths, the liquid superficial velocity and the gas void fraction in the slug region, obtained at the point of flow development, and recalculates the gas superficial velocity and the gas void fraction in the elongated bubble region. As the most independent one in terms of experimental data, methodology 5 is chosen for generating the lists’ initial conditions.
Keywords
Slug Flow, Gas-liquid slug flow, Slug Tracking, Methodologies for the initialization of the slug tracking model
