POSTDOCTORAL RESEARCHERS

Ahmad Fakhari

Ahmad Fakhari

Post-Doc Researcher

   

Profile
CFD specialist and model developer

Research interests

Direct Numerical Simulation (DNS)
80%

Developing and Interacting turbulent boundary layers
90%

Newtonian and viscoelastic fluids
90%

Large Eddy Simulation (LES), wall model and Immersed boundaries
80%


Selected publications

  • V. Armenio, A. Fakhari, A. Petronio, R. Padovan, C. Pitaluga and G. Caprino
    Massive separation around bluff bodies: comparisons among different CFD solvers and turbulence models
    DFD15 Meeting of The American Physical Society, Boston, November 2015.
  • A. Fakhari, A. Petronio, V. Armenio and R. Padovan
    Simulation of flow with massive separation using open-source code
    11th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, Palermo , Italy, 21-23 September 2016
  • A. Fakhari, A. Armenio and F. Roman 
    Wall-layer model for LES with massive separation
    APSDFD16 Meeting of The American Physical Society, Portland, November 2016
  • A. Fakhari, C. Cintolesi, A. Petronio, F. Roman and V. Armenio 
    Numerical simulation of hot smoke plumes from funnels 
    NAV 2018, 19th International Conference on Ship & Maritime Research 2018.
  • A. Fakhari, A. Petronio and V. Armenio
    Simulation of detached flows using OpenFOAM® 
    Workshop “HPC Enabling of OpenFOAM® for CFD Application”, Cineca, Bologna, 6-8 April 2016 

Carlos Veiga Rodrigues

Carlos Veiga Rodrigues

Post-Doc Researcher

   

Profile
I am a Mechanical Engineer focused on solving fluid mechanics and heat transfer problems through the use of Computational Fluid Dynamics (CFD) models. I have worked on atmospheric flows over mountainous terrain, namely by coupling Engineering and Geophysical CFD flow solvers.

I am presently working on the application of the energy equation to viscoelastic flow models. I am also interested in oceanography topics as it presents challenging issues in multiphase flows and sediment-transport modelling.

Presently, working in mass transfer under vertical slug flow.


Research interests

Computational Fluid Dynamics
100%

Turbulence
80%

Geophysical flows
80%

Sediment-transport modelling
80%


Selected publications

  • C.V. Rodrigues, J.M.L.M. Palma, A.H. Rodrigues 
    Atmospheric Flow over a Mountainous Region by a One-Way Coupled Approach Based on Reynolds-Averaged Turbulence Modelling, Boundary-Layer Meteorology, 159, pp. 407-437, 2016.
  • J. Mann, N. Angelou, J. Arnqvist, D. Callies, E. Cantero, R.C. Arroyo, M. Courtney, J. Cuxart, E. Dellwik, J. Gottschall, S. Ivanell, P. Küuhn, G. Lea, J.C.Matos, J.M.L.M. Palma, L. Pauscher, A. Peña, J.S. Rodrigo, S. Söderberg, N. Vasiljevic, C.V. Rodrigues 
    Complex terrain experiments in the New European Wind Atlas, Philosophical Transactions of the Royal Society A, 375, pp. 20160101, 2016.
  • C.V. Rodrigues, J.M.L.M. Palma, N. Vasiljevic, M. Courtney, J. Mann 
    Coupled simulations and comparison with multi-lidar measurements of the wind flow over a double-ridge, Journal of Physics: Conference Series, 753 pp. 032025, 2016.
  • C.V. Rodrigues, J.M.L.M. Palma
    Estimation of turbulence intensity and shear factor for diurnal and nocturnal periods with an URANS fow solver coupled with WRF, Journal of Physics: Conference Series, 524 pp. 012115, 2014.
  • J.S. Rodrigo, D. Allaerts, M. Avila, J. Barcons, D. Cavar, R.A.C. Arroyo, M. Churchfield, R. Kosovic, J.K. Lundquist, J. Meyers, D.M. Esparza, J.M.L.M. Palma, J.M. Tomaszewski, N. Troldborg, M.P. Van der Laan, C.V. Rodrigues 
    Results of the GABLS3 diurnal cycle benchmark for wind energy applications, Journal of Physics: Conference Series, 854 pp. 012037, 2017.
  • L.T. Paiva, C.V. Rodrigues, J.M.L.M. Palma
    Determining wind turbine power curves based on operating conditions, Wind Energy, 17,  pp. 1563-1575, 2014.

Filipe Direito

Filipe Direito

Post-Doc Researcher

   

Profile
Graduated in Chemical Engineering (MIEQ) by Universidade do Porto in 2011. The master thesis work, developed during 5 months in Continental, concerned the study of the chemical formulation used in textiles for rubber reinforcement in road vehicle tyres.

Joined CEFT in 2011. Research work concerned the study of a multiphase flow system (vertical liquid-liquid slug flow and isolated Taylor drops) and was based on the usage of simulation tools (CFD), Ansys Fluent and OpenFOAM. The findings led to four publications in Q1 journals. Additional work included flow visualization in a 6 meter height custom lab set-up. PhD degree (PDEQB) by Universidade do Porto in 2017.

Elected student member of Accompanying Committee of MIEQ (2010-2011) and of PDEQB (2012-2013,2014-2015). Elected student member of Academic Affairs Council of Faculty of Engineering (2014-2015). 

Presently, working in mass transfer under vertical slug flow.


Research interests

Multiphase flow
100%

Simulation - CFD
100%


Selected publications

  • F. Direito, J. Campos and J. Miranda
    Interaction between two consecutive axisymmetric Taylor drops flowing in a heavier liquid in a vertical tube
    International Journal of Heat and Fluid Flow, 68 (pp. 1-12 (12), 2017.
  • F. Direito, J. Campos and J. Miranda
    Rising of a single Taylor drop in a stagnant liquid-2D laminar flow and axisymmetry limits
    Physics of Fluids, 057101 (5), p. 057101 (057120), 2016.
  • F.J.N. Direito, A.O. Morgado, L.A.M. Rocha, J.M. Miranda and J.B.L.M. Campos
    Experimental and numerical 3D study of a Taylor drop rising in a stagnant heavier liquid
    Physics of Fluids, 037109 (3), 2017.
  • F. Direito, J. Campos and J. Miranda
    Taylor drop rising in a liquid co-current flow
    International Journal of Multiphase Flow, 96 (pp. 134-143 (110), 2017.

Filipe Cruz

Filipe Cruz

Post-Doc Researcher

   

Profile
I’m a post-doc researcher who specializes in microscale extensional flows. My work mostly entails the simulation of the flow of dilute polymer solutions in cross-slot geometries.

Presently, working in mass transfer under vertical slug flow.


Research interests

Non-Newtonian Fluid Mechanics
100%

Computational Fluid Dynamics
80%

Extensional Rheology
80%

Dynamical Systems Theory
60%


Selected publications

  • K.B. Fonseca, F.R.R. Maia, F.A. Cruz, D. Andrade, M.A. Juliano, P.L. Granja and C.C: Barrias
    Enzymatic, physicochemical and biological properties of MMP-sensitive alginate hydrogels, Soft Matter, 9 pp. 3283, 2013.
  • F.A. Cruz, R.J. Poole, A.M. Afonso, F.T. Pinho, P.J. Oliveira, M.A. Alves
    A new viscoelastic benchmark flow: Stationary bifurcation in a cross-slot, Journal of Non-Newtonian Fluid Mechanics, 214, pp. 57-68, 2014.
  • F.A. Cruz, R.J. Poole, A.M. Afonso, F.T. Pinho, P.J. Oliveira, M.A. Alves
    Influence of channel aspect ratio on the onset of purely-elastic flow instabilities in three-dimensional planar cross-slots, Journal of Non-Newtonian Fluid Mechanics, 227 pp. 65-79, 2016.

Rui Ferreira

Rui Ferreira

Post-Doc Researcher

   

Profile
I got a Master Degree in Environmental Engineering from the Faculty of Engineering of University of Porto (FEUP) in 2012. In 2017, I finished my PhD on Chemical and Biological Engineering, also at FEUP, with a thesis entitled “Two-phase flow in PEM fuel cells: 1D + 3D model development and numerical simulations”.

I currently work at CEFT as a Researcher on PEM fuel cells and electrolyzers. I am interested on their experimental characterization and on the development of numerical models based on computational fluids dynamics (CFD)


Research interests
PEM fuel cells and electrolyzers
100%

Modeling and simulation by computational fluids dynamics (CFD)
100%


Selected publications

  • R.B. Ferreira, D.S. Falcao, V.B. Oliveira and A.M.F.R. Pinto
    1D+3D two-phase flow numerical model of a proton exchange membrane fuel cell
    Appl Energ, 203 (pp. 474-495, 2017.
  • R.B. Ferreira, D.S. Falcao, V.B. Oliveira and A.M.F.R. Pinto
    Experimental study on the membrane electrode assembly of a proton exchange membrane fuel cell: effects of microporous layer, membrane thickness and gas diffusion layer hydrophobic treatment
    Electrochimica Acta, 224 (pp. 337-345 (339), 2017.
  • R.B. Ferreira, D.S. Falcao, V.B. Oliveira and A.M.F.R. Pinto
    Numerical simulations of two-phase flow in proton exchange membrane fuel cells using the volume of fluid method – A review
    Journal of Power Sources, 277 (pp. 329-342 (314), 2015.

Samir Sadek

Samir Sadek

Post-Doc Researcher

   

Profile
My name is Samir, my research interests lie on the field of Microfluidics applications, with special interest to electrokinetic flow in complex fluids. I have started working with CEFT since June 2011, during that time I was investigating “Electro-osmotic flow of viscoelastic fluids in microchannels”. At the meantime, I was also a PhD student at the department of mechanical engineering at Porto university, and successfully in May 2018, I defend my PhD thesis. Later on, I had the opportunity to work as a postdoctoral researcher at CEFT since June 2018. And with regard to my past academic backgrounds, I did my M.Sc. degree in mechatronics department at Sabanci university (Istanbul – Turkey), and my B.Sc. degree in the department of mechanical engineering at Helwan university (Cairo – Egypt).

Research interests

Microfluidics (technologies and applications)
100%

Rheology, non-Newtonian fluid, viscoelastic fluids
100%

Experimental methods in fluid mechanics and microfabrication techniques
100%

lectrokinetic flow, specifically electro-osmotic driven fl
100%


Selected publications

  • S.H. Sadek and F.T. Pinho
    Electro-osmotic oscillatory flow of viscoelastic fluids in a microchannel [submitted and under-review, July 2018]
    Journal of Non-Newtonian Fluid Mechanics, 2018.
  • S.H. Sadek, F. Pimenta, F.T. Pinho and M.A. Alves
    Measurement of electroosmotic and electrophoretic velocities using pulsed and sinusoidal electric fields
    Electrophoresis, 38 (7), pp. 1022-1037 (1016), 2017.
  • S.H. Sadek and M. Yildiz
    Modeling die swell of second-order fluids using smoothed particle hydrodynamics
    Journal of Fluids Engineering, Transactions of the ASME, 135 (5), 2013.
  • M.S. Shadloo, A. Zainali, S.H. Sadek and M. Yildiz
    Improved Incompressible Smoothed Particle Hydrodynamics method for simulating flow around bluff bodies
    Computer Methods in Applied Mechanics and Engineering, 200 (9-12), pp. 1008-1020, 2011.
  • S.H. Sadek and M. Yildiz
    Numerical simulation of die swell of second-order fluids using Smoothed Particle Hydrodynamics
    ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 2010.
  • S.H. Sadek and M. Yildiz
    Modeling Die Swell of Second-Order Fluids using Smoothed Particle Hydrodynamics
    International Conference on Computational & Experimental Engineering and Sciences (ICCES), Special Symposium on Meshless & Other Novel Computational Methods Bistra Castle, Ljubljana, Slovenia, 2009.

    Soraia Ferreira Neves

    Soraia Ferreira Neves

    Post-Doc Researcher

       

    Profile
    Soraia Ferreira Neves is a post-doctoral Researcher at CEFT center. As a post-doc she has accomplished further experience in modeling heat and mass transfer phenomena, additional know-how concerning thermoregulation models, better understanding of particle transport in microfluidics (biomimetic fluids simulations), and recently she has added a novel proficiency in her scientific career as a supervisor of master theses.

    Her background relies mainly in two scientific fields: i) simulation of heat and mass transport phenomena and ii) modeling human body thermal response. She has developed numerical approaches that considered the heat and mass transfer through materials covering the body for a wide range of physical activities (e.g. rest and exercise phases) and environment conditions (e.g. exposure to high temperature and intense solar radiation, indoor/outdoor conditions). As an outcome, the numerical approaches allowed to understand and to identify critical parameters that affect both the product in contact with the skin and the body heat exchange.


    Research interests

    Heat & mass transport
    100%

    Thermoregulation modelling
    100%

    Microfluidics
    90%

    Multiphase flows
    80%


    Selected publications

    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      Effects of clothing and fibres properties on the heat and mass transport, for different body heat/sweat releases
      Applied Thermal Engineering, 117 (pp. 109-121 (113), 2017.
    • S.F. Neves, S. Couto, J.B.L.M. Campos and T.S. Mayor
      Advances in the optimisation of apparel heating products: A numerical approach to study heat transport through a blanket with an embedded smart heating system
      Applied Thermal Engineering, 87 (pp. 491-498, 2015.
    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      On the determination of parameters required for numerical studies of heat and mass transfer through textiles – Methodologies and experimental procedures
      International Journal of Heat and Mass Transfer, 81 (pp. 272-282 (211), 2015.
    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      Numerical analysis on the thermal performance of an electrically heated bedding product
      In Scientific Conference for Smart and Functional Textiles, Well-being, Thermal Comfort in Clothing, Design, Thermal Manikins and Modelling (Ambience14 & 10i3m) (2014). Tampere, Finland, 2014.
    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
       A numerical simulation study on the thermal performance of ventilated clothes
      In 6th European Conference on Protective Clothing, 2014.
    • R. Rocha, S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      A solution for footwear active cooling
      In 6th Meeting of Young Researchers of U. Porto (IJUP 13), Porto, Portugal, 2013.
    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      Numerical Simulation Study on the Heat and Mass Transfer Through Multi-Layer Textile Assemblies
      In COMSOL Conference, Milan, 2012.
    • S.F. Neves, B.G. Gonçalves, J.B.L.M. Campos and T. Sotto Mayor
      Numerical simulation study on the heat loss from a thermal foot manikin
      In XIV International conference on environmental ergonomics ICEE11 (p. 101). Nafplio, Grécia, 2011
    • S.F. Neves, J.B.L.M. Campos and T. Sotto Mayor
      On the optimization of a wind tunnel by CFD
      In 4th Meeting of Young Researchers of U. Porto (IJUP 11), Porto, Portugal, 2011.