Browsing by Author "Hashemi, Mohammad Reza"
Now showing items 1-13 of 13
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An enhanced non-oscillatory BFECC algorithm for finite element solution of advective transport problems
Hashemi, Mohammad Reza; Rossi, Riccardo; Ryzhakov, Pavel (2022-03)
Article
Open AccessIn this paper, the so-called “back and forth error compensation correction (BFECC)” methodology is utilized to improve the solvers developed for the advection equation. Strict obedience to the so-called “discrete maximum ... -
An enriched finite element/level-set method for simulating two-phase incompressible fluid flows with surface tension
Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (2020-10)
Article
Open AccessA finite element method is introduced to simulate surface tension dominated flow of two immiscible fluids featuring an enriched space for capturing both strong and weak pressure discontinuities. The proposed enriched finite ... -
An enriched finite element/level-set model for two-phase electrohydrodynamic simulations
Narváez Muñoz, Christian; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Pons Prats, Jordi (2023-01-04)
Article
Open AccessIn this work, a numerical model for the simulation of two-phase electrohydrodynamic (EHD) problems is proposed. It is characterized by a physically consistent treatment of surface tension as well as a jump in the electric ... -
Computational electrohydrodynamics in microsystems: a review of challenges and applications
Narváez Muñoz, Christian; Hashemi, Alireza; Hashemi, Mohammad Reza; Segura, Luis Javier; Ryzhakov, Pavel (2025-01)
Article
Open AccessThe principle of electrohydrodynamics (EHD) processes relies on manipulating fluids using electric forces. The advantage of EHD over other fluid manipulation approaches, such as thermal or acoustic-based processes, consists ... -
Direct numerical simulation of multi-phase flow in complex media
Hashemi, Mohammad Reza (Universitat Politècnica de Catalunya, 2022-02-22)
Doctoral thesis
Open AccessIn numerous applications, two-phase liquid-gas transport at sub-millimeter length scales plays a substantial role in the determination of the behavior of the system at hand. As its main application, the present work focuses ... -
Enriched finite element approach for modeling discontinuous electric field in multi-material problems
Narváez Muñoz, Christian; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Pons Prats, Jordi; Owen, Herbert (Elsevier, 2023-11-01)
Article
Open AccessThis work is devoted to developing an efficient and robust technique for accurately capturing the electric field in multi-material problems. The formulation is based on the finite element method enriched by the introduction ... -
Enriched finite element formulation for discontinuous electric field in electrohydrodynamic problems
Narváez Muñoz, Christian; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Pons Prats, Jordi; Owen, Herbert (Universitat Politècnica de Catalunya. Remote Sensing, Antennas, Microwaves and Superconductivity Group (CommSensLab), 2022)
Conference report
Open AccessAlthough 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, ... -
Fast sharp-interface approach for modeling droplets, inkjets, and beyond
Hashemi, Mohammad Reza; Hashemi, Alireza; Shamekhi, Alireza; Narváez Muñoz, Christian; Rossi, Riccardo; Ryzhakov, Pavel (Centro Internacional de Métodos Numéricos para la Ingeniería, 2024-07)
Conference report
Open AccessInkjet technology is a versatile and widely used process in various industries, ranging from printing to microfluidic applications. However, the successful simulation of inkjet dynamics is a complex task due to the ... -
Modeling of solitary wave run-up using localized DQM combined with real time am algorithm
Mahdavi, Ali; Hashemi, Mohammad Reza (CIMNE, 2011)
Conference report
Open AccessAn efficient numerical model, based on non-linear shallow water equations, was developed for propagation and run-up of non-breaking solitary waves. For treatment of the moving shoreline, an Eulerian-Lagrangian mapping ... -
Optimization-based level-set re-initialization: a robust interface preserving approach in multiphase problems
Hashemi, Alireza; Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (Elsevier, 2024-02)
Article
Open AccessIn spite of its overall efficiency and robustness for capturing the interface in multiphase fluid dynamics simulations, the well-known shortcoming of the level-set method is associated with the lack of a systematic approach ... -
Simulating fluid-solid interaction problems using an immersed boundary-SPH method
Hashemi, Mohammad Reza; Fatehi, Rouhollah; Manzari, Mehrdad T. (CIMNE, 2011)
Conference report
Open AccessIn this work, the Immersed Boundary Method (IBM) is adapted and implemented in the context of Smoothed Particle Hydrodynamics (SPH) method to study moving solid bodies in an incompressible fluid flow. The proposed computational ... -
Three dimensional modeling of liquid droplet spreading on solid surface: an enriched finite element/level-set approach
Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (2021-10)
Article
Open AccessA physically consistent approach is introduced to simulate dynamics of droplets in contact with solid substrates. The numerical method is developed by introducing the molecular–kinetic model within the framework of the ... -
Toward droplet dynamics simulation in polymer electrolyte membrane fuel cells: three-dimensional numerical modeling of confined water droplets with dynamic contact angle and hysteresis
Hashemi, Mohammad Reza; Ryzhakov, Pavel; Rossi, Riccardo (2021-12)
Article
Open AccessThis work focuses on three-dimensional simulation of the dynamics of droplets with contact–angle hysteresis. In order to consistently model the dynamics of the contact– line, a combination of the linear molecular kinetic ...