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Browsing 01.NU Schools by Author "Rojas-Solorzano, L."

Browsing 01.NU Schools by Author "Rojas-Solorzano, L."

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  • Modeling and simulation of a rollerball microfluidic device 
    Rojas-Solorzano, L.; Shelley L., Anna; Bradeddine, Bourtal; Amon, Cristina H. (Proceedings of the 7th International Conference on Nanochannels, Microchannels and Minichannels ICNMM2009 June 22-24, 2009, Pohang, South Korea, 2009-06-22)
    The fluid delivery process through a rollerball device is investigated by means of physical modeling and numerical simulations. The microfluidic device is intended to deliver liquid above a substrate interacting with the ...
  • Numerical simulation and experiments of the multiphase flow in a liquid-liquid cylindrical cyclone separator 
    Reyes, Miguel A.; Pacheco, Jorge E.; Marín, Juan C.; Rojas-Solorzano, L.; Rincón, José (Proceedings of FEDSM2006 2006 ASME Joint U.S. - European Fluids Engineering Summer Meeting July 17-20, Miami, FL, 2006-07-17)
    A Liquid-Liquid Cylindrical Cyclone separator (LLCC) is a device used in the petroleum industry to separate the oil-water mixture obtained from the well. The use of this device has not been widespread due to the lack of ...
  • Numerical simulation of draft tube flow in off-design conditions 
    Arzola, Fidel; Rojas-Solorzano, L. (IAHR 24th Symposium on Hydraulic Machinery and Systems OCTOBER 27-31, FOZ DO IGUASSU, 2008-10-27)
    Draft tube flow fields are simulated with 3D unsteady Reynolds averaged Navier-Stokes equations.The purpose of this study is the modeling, simulation and characterization of a complex threedimensional unsteady flow inside ...
  • Numerical simulation of the flow through an intermittent gas lift valve 
    Concho, Maria A.; Gasbarri, Sandro; Rojas-Solorzano, L. (Proceeding of ETCE/OMAE2000 Joint Conference Energy for the New Millenium February 14-17, 2000, New Orleans, LA, 2000-02-14)
    The numerical simulation of the flow through a pilot valve used in the oil intermittent gas lift process is presented.The complexity of the non-isothermal compressible flow is modeled by the solution of the Navier-Stokes, ...
  • Numerical simulation of the heat penetration in two-plate arc welding 
    Payares, C.; Rojas-Solorzano, L.; Viggiani, P. (Conference: h International Congress of Numerical Methods in Engeering and Applied Science (CIMENICS 2000), At Puerto La Cruz, Venezuela, Volume: 5, 2000)
    A mathematical model and numerical simulation of the three-dimensional and transient metal arc-welding process is presented. The heat source is considered as spatially distributed following a centered Gaussian bell, while ...
  • Numerical study of smoke propagation in a simulated fire in a wagon within a subway tunnel 
    Vittori, Felipe; Rojas-Solorzano, L.; Blanco, Armando J.; Urbina, Rafael (Proceedings of FEDSM2008 2008 ASME Fluids Engineering Conference August 10-14, 2008 Jacksonville, Florida USA, 2008-08-10)
    This work deals with the numerical (CFD) analysis of the smoke propagation during fires within closed environments. It is evaluated the capacity of the emergency ventilation system in controlling the smoke propagation and ...
  • Numerical study of turbulence models in the computation of blood flow in cannulas 
    Salazar, Felix A.; Rojas-Solorzano, L.; Antaki, James F. (Proceedings of FEDSM2008 2008 ASME Fluids Engineering Conference August 10-14, 2008, Jacksonville, FL, USA, 2008-08-10)
    In recent years, CFD has become an increasingly used tool in the design of blood-based devices. However, the estimation of red blood cells damage (hemolysis) remains a very important challenge due to the complex rheology ...
  • Oscillatory momentum transport in cascade transitional boundary layer flows 
    Rojas-Solorzano, L. (DOI: 10.2514/6.1998-2560 Conference: 29th AIAA Fluid Dynamics Conference, At Albuquerque, NM, USA, Volume: 1, 1998)
    The generation and early evolution of boundary layer transitional instabilities, named Tollmien-Schlichting (T-S) waves, in airfoil cascade flows are studied. The energy exchange between the mean flow and the flow instabilities ...
  • Pre-feasibility study for PV electrfication of off-grid rural communities 
    Akiki, Georgio; Hinrichs, Federico; Zuylen, Roderick A.; Rojas-Solorzano, L. (International Renewable Energy Congress November 5-7, 2010 – Sousse, Tunisia, 2010-11-05)
    A pre-feasibility study has been undertaken for the electrification of the rural off-grid village of Hurhudedanda, Nepal. PV solar was deemed most suitable after an assessment of local wind, micro-hydro, solar and biogas ...
  • Pre-feasibility study of a biogas plant for peyrelevade community 
    Koh, Pei Ling; Pomarico, Victor; Tadepalli, Venkata Phani; Rojas-Solorzano, L. (International Renewable Energy Congress November 5-7, 2010 – Sousse, Tunisia, 2010-11-05)
    This work presents a technical and financial pre-feasibility assessment for heat generation from biogas for a retirement home in the community of Peyrelevade, France. The heat demand of the retirement home currently relies ...
  • Run Life Enlargement Methodology for Ball-and-Seat Check Valves Used in Artificial Lift Pumping Units 
    Zarea, S.; Rojas-Solorzano, L.; Kabboul, F. (SPE Latin American and Caribbean Petroleum Engineering Conference, Caracas, Venezuela, 21–23 April 1999, 1999-04-21)
    Experiments are performed to evaluate the leakage vs. pressure drop, wear and fluid properties, in ball-and-seat valves used in pumping units for artificial oil production. The test facility is constructed to evaluate the ...
  • Selection and validation of a turbulence model for the numerical simulation of the flow at hemodialysis cannulas 
    Salazar, Félix A.; Rojas-Solorzano, L. (III INTERNATIONAL CONGRESS ON COMPUTATIONAL BIOENGINEERING M. Cerrolaza, H. Rodrigues, M. Doublaré, J. Ambrosio, M. Viceconti (Eds.) Isla de Margarita, Venezuela, September 24 to 26, 2007, 2007-09-24)
    In recent years, CFD has become an increasingly used tool in the design of blood-based devices. Particularly, the estimation of red blood cell damage (hemolysis) becomes an important challenge to CFD scientists since the ...
  • Simulation of the Velocity field in compound channel flow using different closure models 
    Filonovich, M.; Azevedo, R.; Rojas-Solorzano, L.; Leal, J. B. (2010)
    In this study a comparison of three turbulence closure models (two isotropic and one anisotropic) with experimental data is performed. The interaction between the main channel (MC) flow and the floodplain (FP) generates a ...
  • Study of the transient temperature profiles induced by changes of the welding parameters during aluminium two plate arc butt-welding 
    Urthaler, Yetzirah; Viggiani, Pedro; Payares, Carolina; Rojas-Solorzano, L. (Universidad Simón Bolívar Departamento de Mecánica (*) Departamento de Conversión de Energía, 2001)
    The numerical study and calculation of transient temperatures developing during the arc-welding process of 6063 T5 aluminum plates is presented. The mathematical model is based on the differential energy conservation ...
  • Teaching how to use the CFD Approach by an Example: Hydrodynamics within a Passenger Car Compartment in Motion 
    Rojas-Solorzano, L.; García, Nelson; Polanco, Geanette (DOI: 10.1115/FEDSM2009-78014 Conference: ASME 2009 Fluids Engineering Division Summer Meeting, At Vail, Colorado USA, Volume: 1, 2009-08-02)
    The CDF methodology is applied to the study of the air flow around a 2-D car and its interaction with the cabin internal air. The flow visualization or computational works enable engineers to calculate different car ...
  • Technical and economical prefeasibility study of a solar water heating (SWH) system in an apartment building in Cape Town 
    Idowu, Olugbeminiyi; Ige, Toluwalope; Legenski, Nicole; Mustafa, Amin A.; Rojas-Solorzano, L. (7th International Exergy, Energy and Environment Symposium, Valenciennes, France; 04/2015, 2015-04)
    Solar power has significant potential to reduce reliance on conventional energy sources in South Africa. A prefeasibility study for a communal solar water heating system (SWHS) is performed for an apartment building in the ...
  • Technical and economic prefeasibility analysis of residential solar PV system in South Kazakhstan 
    Assamidanov, Anuar; Nogerbek, Nurbol; Rojas-Solorzano, L. (7th International Exergy, Energy and Environment Symposium, 2015-04)
    In the family of the renewable technologies, photovoltaic (PV) systems today attract considerable attention (Dornfeldt, 2013). However, on-grid PV market is not a profitable sector by itself. It is dependent on the ...
  • Technical and economic prefeasibility study of mini-hydro power plants in Venezuela. Case study: El Valle River 
    Trejo, Victor; Diaz, Gabriela; Rojas-Solorzano, L. (7th International Exergy, Energy and Environment Symposium, 2015-04)
    The technical and economic feasibility of the installation of a mini-hydroelectric power plant on El Valle River in Venezuela is assessed. Special attention is paid to modeling Venezuela’s energetic and economic scenarios. ...
  • Technical-Economic Assessment of Energy Efficiency Measures in a Mid-Size Industry 
    Benavides, Sara; Bitosova, Maria; Gregorio, Javier; Welschbilling, Aubin; Rojas-Solorzano, L. (7th International Exergy, Energy and Environment Symposium, 2015-04)
    The industry sector is facing many challenges such as global competition, energy pricing, environmental impact amongst others. Consequently, the necessity of energy efficiency measures has become evident; framing the ...
  • Technical-Economic Prefeasibility Assessment of an off-grid Mini-Hydro Power Plant for an Agribusiness Resort in Kaduna Nigeria 
    Adamu, Victor; Ampofo, Nana; Pramono Jati, Ario Panggi; Tulabing, Ryan; Rojas-Solorzano, L. (7th International Exergy, Energy and Environment Symposium, 2015-04)
    Clean energy technologies are beginning to receive attention in Nigeria to offset the increasing greenhouse gas emissions. These emissions are associated to the wide use of small-scale fossil-fuel-powered generators by ...