Viriato Semião

ORCID: 0000-0003-0612-8155
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About
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Research Areas
  • Membrane Separation Technologies
  • Radiative Heat Transfer Studies
  • Nanopore and Nanochannel Transport Studies
  • Combustion and flame dynamics
  • Municipal Solid Waste Management
  • Microfluidic and Capillary Electrophoresis Applications
  • Solar-Powered Water Purification Methods
  • Lattice Boltzmann Simulation Studies
  • Thermochemical Biomass Conversion Processes
  • Aerosol Filtration and Electrostatic Precipitation
  • Wind and Air Flow Studies
  • Fluid Dynamics and Turbulent Flows
  • Heat Transfer and Optimization
  • Innovative Microfluidic and Catalytic Techniques Innovation
  • Membrane-based Ion Separation Techniques
  • Building Energy and Comfort Optimization
  • Heat Transfer and Boiling Studies
  • Recycling and Waste Management Techniques
  • Microfluidic and Bio-sensing Technologies
  • Iterative Methods for Nonlinear Equations
  • Calibration and Measurement Techniques
  • Fluid Dynamics and Vibration Analysis
  • Transportation and Mobility Innovations
  • Fluid Dynamics and Heat Transfer
  • Vehicle Routing Optimization Methods

University of Lisbon
2015-2024

Instituto Politécnico de Lisboa
2009-2023

Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2011-2021

Instituto Superior Técnico
2003-2014

Instituto Superior de Tecnologias Avançadas
2007-2011

Marymount University
2002

Abstract Purpose – The high costs of collection and transportation municipal solid waste (MSW) on the overall management budget (sometimes more than 75 per cent) makes it an issue to be urgently addressed for improvement. paper aims focus optimisation routing networks collection/transportation. Design/methodology/approach proposes herein application geographic information system (GIS) 3D route modelling collection/transportation optimise according minimum fuel consumption criterion different...

10.1108/14777830810878632 article EN Management of Environmental Quality An International Journal 2008-06-13

Abstract The isothermal Navier–Stokes equations are determined by the leading three velocity moments of lattice Boltzmann method (LBM). Necessary conditions establishing hydrodynamic consistency these provided multiscale asymptotic techniques, such as second-order Chapman–Enskog expansion. However, for simulating incompressible hydrodynamics structure forcing term in LBM is still a discordant issue far its correct expansion order concerned. This work uses traditional analysis to demonstrate...

10.1017/jfm.2012.83 article EN Journal of Fluid Mechanics 2012-04-05

10.1016/j.amc.2005.04.045 article EN Applied Mathematics and Computation 2005-06-15

10.1016/j.jqsrt.2004.11.008 article EN Journal of Quantitative Spectroscopy and Radiative Transfer 2005-01-25

A mathematical model to predict the concentration polarisation in nanofiltration/reverse osmosis is described. It incorporates physical modelling for mass transfer, laminar hydrodynamics and membrane rejection coefficient. The SIMPLE algorithm solves discretised equations derived from governing differential equations. convection diffusive terms of those are by upwind, hybrid exponential schemes comparison purposes. scheme appears as most suitable one type flows studied herein. first applied...

10.1108/02644400010324857 article EN Engineering Computations 2000-05-01

The first nonequilibrium effect experienced by gaseous flows in contact with solid surfaces is the slip-flow regime. While classical hydrodynamic description holds valid bulk, at boundaries fluid-wall interactions must consider slip. In comparison to standard no-slip Dirichlet condition, case of slip formulates as a Robin-type condition for fluid tangential velocity. This makes its numerical modeling challenging task, particularly complex geometries. this work, issue handled lattice...

10.1103/physreve.96.013311 article EN Physical review. E 2017-07-18

Splitting techniques have been used extensively for computing reacting flows with detailed chemistry. Nevertheless, there are still some open questions respect to efficiency and the error introduced by splitting. In this paper, accuracy effectiveness of split-operator methods steady-state determined. A fully coupled scheme is described together two splitting schemes: a standard Strang-splitting consistent-splitting scheme, all implicit transport computations. The effect errors on convergence...

10.1088/1364-7830/7/2/310 article EN Combustion Theory and Modelling 2003-06-01

This study aimed to experimentally validate a computational fluid dynamics (CFD) model, using micro-particle image velocimetry (micro-PIV) measurements of the irrigation flow velocity field developed in confluent canals during with side-vented needle.A microchip canals, manufactured polydimethylsiloxane was used micro-PIV analysis needle placed 3 mm from end confluence canals. Velocity fields and profiles were recorded for rates 0.017 0.1 ml/s compared those predicted CFD numerical...

10.1111/iej.13827 article EN International Endodontic Journal 2022-08-30
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