Profile
Ph.D.
Completed
19 Mar 2024
129 pages
Universidade Federal do Rio de Janeiro
Advisor: Anjos, G. R.
Daniel Barbedo Vasconcelos Santos
Finite Element Simulation of Three-Dimensional Two-Phase Flows in Complex Geometries
Student work
Finite Element Simulation of Three-Dimensional Two-Phase Flows in Complex Geometries
Abstract
In this work, three-dimensional two-phase flows in complex geometries are investigated through finite element numerical simulations. The governing equations, are written in three-dimensional Cartesian coordinates and solved through the finite element method on unstructured meshes, using the Taylor-Hood "Mini" element, chosen due to its numerical stability and convergence. The convective term of the momentum equation is discretized by a first-order semi-Lagrangian method. The fluid phases are separated by an interface mesh constructed by triangular surface elements, uncoupled from the main three-dimensional fluid mesh. Surface tension force is calculated through the Laplace-Beltrami operator and added to the simulation as a source term through the continuum surface force model (CSF). At the start of each time step, the positions of the interface mesh nodes are updated based on the fluid velocity fields. The proposed methodology is verified against analytical and experimental data through single and two-phase benchmark tests found in the literature, such as the static droplet, oscillating droplet, rising bubble in quiescent fluid and Taylor bubbles, and the numerical code is used to simulate several twophase flows in complex geometries, such as Taylor bubbles in different cross-sections and converging, expanding and curved channels
Advising
Advisor: Anjos, G. R.
Research output
9 publications
Journal articles, conference papers and other records associated with this student.
Publications
Publications
Numerical Investigation of a Gas Bubble in Complex Geometries for Industrial Process Equipment Design
This study investigates three-dimensional two-phase flows in complex geometries found in industrial process equipment design using finite-element numerical simulations. The governing equations are formulated in...
Numerical Investigation of Gas Bubble Interaction in a Circular Cross-Section Channel in Shear Flow
This work’s goal is to numerically investigate the interactions between two gas bubbles in a fluid flow in a circular cross-section channel, both in the presence and in the absence of gravitational forces, with several...
Finite Element Simulation of Two-Phase Flows with Heat and Mass Transfer Through a Decoupled Mesh Method
Foz do Iguaçu, Brazil
Computation of Deformable Interface Two-Phase Flows: A Semi-Lagrangian Finite Element Approach
Keywords: coalescence, finite element method, Taylor bubbles, two-phase flows, unstructured mesh
ABSTRACT This work aims at presenting a new computational approach to study two and three dimensional two-phase flows and two dimensional coalescence phenomenon using direct numerical simulation. The flows are modeled by...
Computation of Deformable Interface Two-Phase Flows - A Semi-Lagrangian Finite Element Approach
Porto, Portugal
Axisymmetric Two-Phase Finite Element Simulation Using a Front Tracking Method on an Unstructured Mesh
Bento Gonçalves, Brazil
Finite Element Simulation for Two-Phase Flow with a Decoupled Fluid Interface
Florianópolis, Brazil
Decoupled Mesh Method for Finite Element Simulation of Two-Phase Systems
Rio de Janeiro, Brazil
Numerical Simulation of Multiphase Flows in the Context of COVID-19/SARS-CoV-2
Bento Gonçalves, Brazil