Now showing items 1-20 of 22

    • A dynamic load balancing method for the evaluation of chemical reaction rates in parallel combustion simulations 

      Muela Castro, Jordi; Borrell Pol, Ricard; Ventosa Molina, Jordi; Jofre Roca, Lluís; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (Elsevier, 2019-08-15)
      Article
      Restricted access - publisher's policy
      The development and assessment of an efficient parallelization method for the evaluation of reaction rates in combustion simulations is presented. Combustion simulations where the finite-rate chemistry model is employed ...
    • A new method for performing smouldering combustion field experiments in peatlands and rich-organic soils 

      Pastor Ferrer, Elsa; Oliveras Menor, Immaculada; Urquiaga-Flores, Erickson; Quintano Loayza, Jose Antonio; Manta Nolasco, Maria Isabel; Planas Cuchi, Eulàlia (2017-12-08)
      Article
      Open Access
      Smouldering ground fires have severe environmental implications. Their main effects are the release of large amounts of carbon to the atmosphere with loses of organic soil and its biota. Quantitative data on the behaviour ...
    • Aplicación del método level set para modelar el proceso de combustión premezclada en un motor Otto de dos tiempos 

      Lamas Galdo, M.I.; Rodríguez Vidal, C.G.; Rodríguez García, J.D. (Universitat Politècnica de Catalunya. CIMNE, 2013)
      Article
      Open Access
      En este artículo se ha utilizado el método numérico conocido como level set para modelar el proceso de combustión en un motor Otto de dos tiempos. Se ha implementado el level set en un software libre de mecánica de fluidos ...
    • Comparative study of subfilter scalar dissipation rate and mixture fraction variance models 

      Ventosa Molina, Jordi; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Muela Castro, Jordi; Oliva Llena, Asensio (2014)
      Conference report
      Restricted access - publisher's policy
      Accurate characterisation of mixing at the subfilter level is a critical aspect in many LES combustion models, such as flamelet based and Conditional Moment Closure models. Several models can be found in the literature, ...
    • Constant pressure combustion chamber for a high energetic solid propellant study as a part of a low cost launcher 

      Moga Dominguez, Albert (Universitat Politècnica de Catalunya, 2010-11-30)
      Bachelor thesis
      Open Access
    • Design of a compact combustor-heat exchanger 

      Torres Roa, Pere-Lluc (Universitat Politècnica de Catalunya / Lunds Tekniska Högskola, 2008)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement
    • Diseño de una instalación para el estudio del efecto dominó con dardos de fuego 

      Martín Peral, Sergio (Universitat Politècnica de Catalunya, 2019-02-04)
      Bachelor thesis
      Open Access
      En este trabajo de fin de grado se pretende diseñar, construir y poner en funcionamiento una instalación para analizar experimentalmente el impacto de dardos de fuego, mediante propano, en tuberías de transporte de fluidos ...
    • Estudio cinético del aprovechamiento energético de maderas residuales (I) 

      Reina Hernandez, Joaquin A.; Velo García, Enrique; Puigjaner Corbella, Lluís (2010-06)
      Article
      Restricted access - publisher's policy
      En esta primera parte del artículo, se estudia experimentalmente la cinética de la descomposición térmica de cinco tipos diferentes de madera residual por medio de ensayos dinámicos realizados por análisis termogravimétrico ...
    • Fostering Collaboration in Energy Research and Technological Developments applying new exascale HPC techniques 

      Cela, Jose M.; Coutinho, Alvaro L.G.A.; Navaux, Philippe O.A.; Mayo-García, Rafael (Institute of Electrical and Electronics Engineers (IEEE), 2016-05)
      Conference report
      Open Access
      During the last years, High Performance Computing (HPC) resources have undergone a dramatic transformation, with an explosion on the available parallelism and the use of special purpose processors. There ...
    • Large-eddy simulation of ow and combustion dynamics in a lean partially premixed swirling combustor 

      Li, Shaoshuai; Zheng, Yunzhe; Zhu, Min; Mira, Daniel; Jiang, Xi (Elsevier, 2015-11-06)
      Article
      Open Access
      A lean partially premixed swirling combustor was studied by resolving the complete flow path from the swirl vanes to the chamber outlet with large-eddy simulation (LES). The flow and combustion dynamics for non-reacting ...
    • Low Mach Navier-Stokes equations on unstructured meshes 

      Ventosa Molina, Jordi; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2012)
      Conference report
      Restricted access - publisher's policy
      Numerical methods for fluxes with strong density variations but with speeds much lower than the sound speed, known as low Mach flows, present some particularities with respect to incompressible formulations. Despite ...
    • Low-dissipation finite element strategy for low Mach number reacting flows 

      Both, Ambrus; Lehmkuhl, Oriol; Mira Martínez, Daniel; Ortega, Marc (Elsevier, 2020-03-30)
      Article
      Restricted access - publisher's policy
      The present paper extends the conservative finite element convective scheme proposed by Charnyi et al.(Journal of Computational Physics 337, 2017, 289–308) originally formulated for incompressible flows to the low Mach ...
    • Motor tèrmic Berdrod 

      Bernet Duque, Marc-Teodor (Universitat Politècnica de Catalunya, 2019-07)
      Bachelor thesis
      Open Access
      Estudi de la viabilitat d’una variant del motor de combustió interna alternatiu de quatre temps destinat a vehicles, principalment motocicletes, que combina la adequació metamòrfica de la funcionalitat dels elements que ...
    • Nanofaceted PdO sites in PdCe surface superstructures: enhanced activity in catalytic combustion of methane 

      Colussi, Sara; Gayen, Arup; Farnesi Camellone, Matteo; Boaro, Marta; Llorca Piqué, Jordi; Fabris, Stefano; Trobarelli, Alessandro (2009-10)
      Article
      Restricted access - publisher's policy
      An open superstructure: A Pd/CeO2 catalyst prepared by solution combustion synthesis is three to five times more active for CH4 combustion than the best conventional palladium-based systems. The catalyst contains an ordered, ...
    • Numerical characterization of a technically premixed hydrogen flame under conditions close to flashback 

      Mira Martínez, Daniel; Lehmkuhl, Oriol; Both, Ambrus; Stathopoulos, Panagiotis; Tanneberger, Tom; Reichel, Thoralf G.; Paschereit, Christian Oliver; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2020-03)
      Article
      Restricted access - publisher's policy
      This work presents a numerical study of a technically premixed swirling combustor with central air injection at conditions close to flashback using large-eddy simulation with flamelet modelling. This burner has the ...
    • Numerical Resolution of Fluid Dynamics and Heat and Mass Transfer problems. Application to Combustion Processes 

      Veiga Fernández, David (Universitat Politècnica de Catalunya, 2020-06-30)
      Master thesis
      Open Access
      Covenantee:   Institut polytecnique des sciences avancées
      The study and optimization of Combustion processes has transcended the engineering necessity to become an environmental concern. Recent regulations implement growing restrictions on emissions produced in industries that ...
    • Origin of high activity and selectivity of CuO/CeO2 catalysts prepared by solution combustion synthesis in CO-PROX reaction 

      Barbato, P.S.; Colussi, Sara; Di Benedetto, A.; Landi, Giada; Lisi, L.; Llorca Piqué, Jordi; Trovarelli, Alessandro (2016-06-23)
      Article
      Restricted access - publisher's policy
      A CuO/CeO2 catalyst with 4 wt % CuO nominal content has been prepared by solution combustion synthesis (SCS) and characterized by ICP-MS, BET surface area analysis, XPS, HRTEM, and H-2, and/or CO TPR. The catalyst, showing ...
    • Shape-dependent activity of ceria in soot combustion 

      Aneggi, Eleonora; Wiater, Dawid; de Leitenburg, Carla; Llorca Piqué, Jordi; Trovarelli, Alessandro (2014-01)
      Article
      Restricted access - publisher's policy
      In this study, a series of conventional polycrystalline ceria and single-crystalline ceria nanorods and nanocubes were prepared by hydrothermal methods, and their structural, redo; and morphological properties were ...
    • Simultaneous removal of soot and NOx, over K- and Ba-doped ruthenium supported catalysts 

      Matarrese, Roberto; Aneggi, Eleonora; Castoldi, Lidia; Llorca Piqué, Jordi; Trovarelli, Alessandro; Lietti, Luca (2016-06-01)
      Article
      Open Access
      Ruthenium-based materials are investigated for the simultaneous removal of soot and NOx and their behavior is compared with that of model Pt-Ba/Al2O3 and Pt-K/Al2O3 catalysts.; The materials, 1%wt Ru-10%wt AM/MO (AM = Ba ...
    • Single step combustion synthesized Cu/Ce0.8Zr0.2O2 for methanol steam reforming: Structural insights from in situ XPS and HRTEM studies 

      Das, Dipak; Llorca Piqué, Jordi; Domínguez Escalante, Montserrat; Gayen, Arup (2015-11-02)
      Article
      Open Access
      Single step combustion synthesized Cu (5–15 at.-%)/Ce0.8Zr0.2O2 materials containing highly dispersed copper have been assessed for methanol steam reforming (MSR). The activity patterns suggest Cu (10 at.-%)/Ce0.80Zr0.20O2 ...