Enriched finite element formulation for discontinuous electric field in electrohydrodynamic problems

Carregant...
Miniatura
El pots comprar en digital a:
El pots comprar en paper a:

Projectes de recerca

Unitats organitzatives

Número de la revista

Títol de la revista

ISSN de la revista

Títol del volum

Col·laborador

Editor

Tribunal avaluador

Realitzat a/amb

Càtedra / Departament / Institut

Tipus de document

Text en actes de congrés

Data publicació

Editor

Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab)

Part de

Condicions d'accés

Accés obert

item.page.rightslicense

Creative Commons
Aquesta obra està protegida pels drets de propietat intel·lectual i industrial corresponents. Llevat que s'hi indiqui el contrari, els seus continguts estan subjectes a la llicència de Creative Commons: Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional

Assignatures relacionades

Assignatures relacionades

Datasets relacionats

Datasets relacionats

Projecte CCD

Abstract

Although purely analytical models can provide rough qualitative predictions in the field of electrohydrodynamics (EHD), more sophisticated numerical approaches are necessary to quantitatively study the involved phenomena [1, 2]. Considering the computational cost and complexities associated with the mesh-free numerical methods, mesh-based methods are usually more efficient for fluid dynamics applications. Nevertheless, in the case of multiphase EHD flows, the difference in the material properties of the phases imposes discontinuities in the field variables (e.g. pressure, electric field). In this sense, the accuracy of the solution of EHD problems depends on the sharp representation of the strong (jump) and weak discontinuities in the field variables. So far, different numerical techniques have been proposed in the literature to represent such discontinuity, for example, Weighted Harmonic Averaging Method (WHAM), the Ghost Fluid Method (GFM), Immersed Interface Method (IIM), to name just a few. However, these schemes can accurately capture the electric field only in cases of small permittivity ratio, perfect dielectric fluids, or via a computationally expensive refinement process. On the other hand, the Enriched Finite Element Method (EFEM) can be acquired as a viable option for EHD problems. EFEM relies on the enrichment of the shape functions for the elements cut by the phase interface. In this work, such enrichment is proposed to accurately capture the weak discontinuity in the electric potential (or equivalently the jump in the electric field), adopting the ideas previously explored for representing pressure gradient discontinuity in two-phase flows [3]. The main advantage of this method is that the enrichment functions do not depend on the neighboring elements, and therefore, the associated additional degrees of freedom (DoF) can be condensed at the elemental level. This feature makes EFEM one of the most efficient techniques for multi-phase problems. Although this technique has been widely used for multi-phase CFD applications [4, 5], the employment of EFEM for EHD applications has scarcely been addressed in the literature. In this sense, the present work is among the very first applications of the EFEM method to EHD problems.

Descripció

Document relacionat

Citació

Narváez Muñoz, C. [et al.]. Enriched finite element formulation for discontinuous electric field in electrohydrodynamic problems. A: EIEC 2022. "XIV Iberian Meeting on Computational Electromagnetics". Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022,

Ajut

Forma part

DOI

Dipòsit legal

ISBN

ISSN

Versió de l'editor

Altres identificadors

Referències