Now showing items 1-17 of 17

  • Contaminant particle motion in lubricating grease flow: a computational fluid dynamics approach 

    Westerberg, Lars-Göran; Farré Lladós, Josep; Sarkar, Chiranjit; Casals Terré, Jasmina (2018)
    Article
    Open Access
    In this paper, numerical simulations of particle migration in lubricating grease flow are presented. The rheology of three lithium greases with NLGI (National Lubricating Grease Institute) grades 00, 1 and 2 respectively ...
  • Enhanced fully cellulose based forward and reverse blood typing assay 

    Casals Terré, Jasmina; Farré Lladós, Josep; López Martínez, Joan Antoni; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca (2019-05-07)
    Article
    Restricted access - publisher's policy
    This study presents an enhanced paper-based analytical device (PAD) for forward and reverse group blood typing. The proposed PAD uses a novel methodology, which provides highly reliable results on a fully cellulose based ...
  • Grease flow in an elbow channel 

    Westerberg, Lars; Farré Lladós, Josep; Li, Jinxia; Hoglund, Erik; Casals Terré, Jasmina (2015-03-01)
    Article
    Open Access
    The flow of lubricating greases in an elbow channel has been modeled and validated with velocity profiles from flow visualizations using micro-particle image velocimetry. The elbow geometry induces a non-symmetric distribution ...
  • Grease flow in an elbow-channel 

    Westerberg, Lars; Farré Lladós, Josep; Li, Jinxia; Hoglund, Erik; Casals Terré, Jasmina (2014)
    Conference report
    Restricted access - publisher's policy
  • Hemostasis-on-a-chip: Impedance spectroscopy meets microfluidics for hemostasis evaluation 

    Karimi, Shadi; Farré Lladós, Josep; Mir Fuertes, Enrique; Escolar Albaladejo, Ginés; Casals Terré, Jasmina (2019-08-14)
    Article
    Open Access
    In the case of vascular injury, a complex process (of clotting) starts, involving mainly platelets and coagulation factors. This process in healthy humans is known as hemostasis, but when it is deregulated (thrombosis), ...
  • Influences of trans-fatty acids on the tribological properties of plant oils 

    Farré Lladós, Josep; Igartua, Amaya; Minami, Ichiro (IK4-Tekniker, 2016)
    Conference report
    Restricted access - publisher's policy
    A great challenge on tribology is the improvement of vegetable oils lubrication properties, which are environmentally friendly products, to replace long established lubricants based on mineral oils (petroleum). It is well ...
  • Los aerogeneradores del futuro se beneficiarán de la nanotecnología 

    Farré Lladós, Josep; Casals Terré, Jasmina (Grupo Tecnipublicaciones, 2014-01)
    Article
    Restricted access - publisher's policy
    El impacto que la micro y la nanotecnología tendré en nuestras vidas debe ir en todo momento acompañado de un desarrollo sostenible de las fuentes de energía. La mejora de la producción de la energía eólica es un primer ...
  • Lubricating grease flow in a double restriction seal geometry: a computational fluid dynamics approach 

    Westerberg, Lars G.; Sarkar, Chiranjit; Farré Lladós, Josep; Staffan Lundström, T.; Hoglund, Erik (2017-09-01)
    Article
    Open Access
    In this paper, numerical simulations of lubricating grease flow in the grease pocket of a double restriction seal geometry using computational fluid dynamics are presented. The grease is treated as a single-phase ...
  • New lubrication device to minimize wear at the pitch gear 

    Farré Lladós, Josep; Casals Terré, Jasmina; Westerberg, Lars G. (European Wind Energy Association (EWEA), 2015)
    Conference lecture
    Restricted access - publisher's policy
  • New method for lubricating wind turbine pitch gears using embedded micro-nozzles 

    Farré Lladós, Josep; Westerberg, Lars G.; Casals Terré, Jasmina (Springer, 2017-02-19)
    Article
    Open Access
    The increase of power generated by wind turbines has increased the stresses applied in all of its components, thereby causing premature failures. Particularly, pitch and yaw gears suffer from excessive wear mainly caused ...
  • New solution to prevent excessive wear in wind turbine gears 

    Farré Lladós, Josep; Westerberg, Lars; Casals Terré, Jasmina (Curran, 2014)
    Conference report
    Restricted access - publisher's policy
    During wind turbines operation, yaw and pitch bearings suffer from sequential traction-compression stresses causing millions of micro movements per cycle between the gear teeth. This situation reduces the lubricant thickness ...
  • Novel applications of nonwood cellulose for blood typing assays 

    Casals Terré, Jasmina; Farré Lladós, Josep; Zuñiga, Allinson; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa (2018-10-03)
    Article
    Open Access
    Paper-based microfluidics devices can create a new healthcare model. Cellulose is carbohydrate polymer biocompatible and hydrophilic. These characteristics enhance the development of user-friendly diagnostic devices, but ...
  • Novel lubrication system to improve the excessive wear in wind turbine yaw and pitch gears 

    Farré Lladós, Josep (Universitat Politècnica de Catalunya, 2015-04-28)
    Doctoral thesis
    Open Access
    Manufacturers of wind turbines have observed a new phenomenon that appears in high power wind turbines: excessive wear in the teeth located at 0º in the pitch bearing. In order to design more efficient wind turbines, ...
  • Novel variable radius spiral-shaped micromixer: from numerical analysis to experimental validation 

    Mehrdel, Pouya; Karimi, Shadi; Farré Lladós, Josep; Casals Terré, Jasmina (2018-10-27)
    Article
    Open Access
    A novel type of spiral micromixer with expansion and contraction parts is presented in order to enhance the mixing quality in the low Reynolds number regimes for point-of-care tests (POCT). Three classes of micromixers ...
  • Potencial de la celulosa en la construcción de nuevos materiales 

    Vidal Lluciá, Teresa; Torres López, Antonio Luis; Valls Vidal, Cristina; Cusola Aumedes, Oriol; López Martínez, Joan Antoni; Fernández Santos, Julia; Clemente Escuin, Antonio; Roncero Vivero, María Blanca; Casals Terré, Jasmina; Farré Lladós, Josep (2019)
    Conference report
    Open Access
    Actualmente, más de una tercera parte de los tipos de papeles que hoy empleamos son para nuevos usos que hace diez años no existían. Además, la demanda creciente de productos basados en materias primas renovables y la ...
  • REPlicating RAPid microfluidics: self-replicating printer for hydrophobic pattern deposition 

    Casals Terré, Jasmina; Farré Lladós, Josep; Zuñiga, Allinson; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa (2017-12-01)
    Article
    Open Access
    Paper-based microfluidics broadens the use of point-of-care devices to applications and situations wherein cost is an important restriction. This study focuses on the REPRAP PRUSA i3 Printer that can print itself a part ...
  • The use of rapid prototyping techniques (RPT) to manufacture micro channels suitable for high operation pressures and uPIV 

    Farré Lladós, Josep; Casals Terré, Jasmina; Voltas Aguilar, Jordi; Westerberg, Lars G. (2016)
    Article
    Open Access
    This paper aims to present a new methodology to manufacture micro-channels suitable for high operating pressures and micro particle image velocimetry (µPIV) measurements using a rapid-prototyping high-resolution 3D printer. ...