Now showing items 1-20 of 23

    • A molecular simulation study on transport properties of FAMEs in high-pressure conditions 

      Chen, Cheng; Mira, Daniel; Jiang, Xi (Elsevier, 2022)
      Article
      Restricted access - publisher's policy
      Transport property prediction of fatty acid methyl esters (FAMEs) is essential to its utilisation as biodiesel and biolubricant which can work under high-pressure conditions. Equilibrium molecular simulation is performed ...
    • Alya: Multiphysics engineering simulation toward exascale 

      Vázquez, Mariano; Houzeaux, Guillaume; Koric, Seid; Artigues, Antoni; Aguado Sierra, Jazmin; Arís Sánchez, Ruth; Mira, Daniel; Calmet, Hadrien; Cucchietti, Fernando; Owen, Herbert; Taha, Ahmed; Dering Burness, Evan; Cela Espín, José M.; Valero Cortés, Mateo (Elsevier, 2016-05)
      Article
      Open Access
      Alya is a multi-physics simulation code developed at Barcelona Supercomputing Center (BSC). From its inception Alya code is designed using advanced High Performance Computing programming techniques to solve coupled problems ...
    • Alya: Multiphysics engineering simulation toward exascale 

      Vázquez, Mariano; Houzeaux, Guillaume; Koric, Seid; Artigues, Antoni; Aguado-Sierra, Jazmin; Arís, Ruth; Mira, Daniel; Calmet, Hadrien; Cucchietti, Fernando; Owen, Herbert; Taha, Ahmed; Burness, Evan D.; Cela, José M.; Valero Cortés, Mateo (Elsevier, 2016-02-01)
      Article
      Open Access
      Alya is a multi-physics simulation code developed at Barcelona Supercomputing Center (BSC). From its inception Alya code is designed using advanced High Performance Computing programming techniques to solve coupled problems ...
    • An extended flame index partitioning for partially premixed combustion 

      Illana, Enric; Mira, Daniel; Mura, Arnaud (Taylor and Francis, 2020)
      Article
      Open Access
      Compared to partially premixed combustion (or combustion of non-homogeneous reactants in general), fully premixed and diffusion flames represent only two asymptotic limits of combustion modes. However, the deep knowledge ...
    • Analysis of local extinction of a n-heptane spray flame using large-eddy simulation with tabulated chemistry 

      Benajes, Jesús V.; García Oliver, José M; Pastor, José Manuel; Olmeda, I; Both, Ambrus; Mira, Daniel (Elsevier, 2021)
      Article
      Restricted access - publisher's policy
      This work is focused on the study of flame stabilization and local extinction of a spray flame in an atmospheric non-swirled test rig referred to as the CORIA Rouen Spray Burner. This burner shows a double reaction front ...
    • Assessment of chemistry reduction in high-pressure spray flames of oxymethylene ethers using large-eddy simulations 

      Mira, Daniel; Surapaneni, Anurag; Pérez, Eduardo; Both, Ambrus; Lehmkuhl Barba, Oriol; Houzeaux, Guillaume (2021)
      Conference lecture
      Open Access
      This study is focused on the numerical investigation of reduced chemical schemes for high pressure spray flames of oxymethylene ethers (OMEx). A reduced mechanism using Path Flux Analysis (PFA) technique is tested using ...
    • Development of the conditional moment closure with a multi-code approach in the frame of Large Eddy Simulations 

      Pérez Sánchez, Eduardo Javier; Mira, Daniel; Lehmkuhl Barba, Oriol; Houzeaux, Guillaume (MCM, 2021)
      Conference lecture
      Open Access
      The Conditional Moment Closure (CMC), devised for turbulent combustion modelling, was implemented in the multiphysics code Alya, based on the Finite Element Method (FEM), in the frame of Large Eddy Simulations (LES) for ...
    • Evaporation of volatile droplets subjected to flame-like conditions 

      Both, Ambrus; Mira, Daniel; Lehmkuhl Barba, Oriol (Elsevier, 2022)
      Article
      Restricted access - publisher's policy
      This work assesses Lagrangian droplet evaporation models frequently used in spray combustion simulations, with the purpose of identifying the influence of modeling decisions on the single droplet behavior. Besides more ...
    • Heat loss prediction of a confined premixed jet flame using a conjugate heat transfer approach 

      Gövert, S.; Mira, Daniel; Zavala-Ake, M.; Kok, J.B.W.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2017-04)
      Article
      Open Access
      The presented work addresses the investigation of the heat loss of a confined turbulent jet flame in a lab-scale combustor using a conjugate-heat transfer approach and large-eddy simulation. The analysis includes the ...
    • Heat Transfer Effects on a Fully Premixed Methane Impinging Flame 

      Mira, Daniel; Zavala, Miguel; Avila, Matías; Owen, Herbert; Cajas García, Juan Carlos; Vázquez, Mariano; Houzeaux, Guillaume (Springer, 2016-01-09)
      Article
      Open Access
      A numerical assessment of different thermal conditions for an impinging flame configuration is investigated using large-eddy simulation. The cases of study correspond to a turbulent methane flame at equivalence ratio ER = ...
    • 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 ...
    • LES study of the impact of fuel composition on a swirl spray flame approaching blow-off 

      Both, Ambrus; Mira, Daniel; Lehmkuhl Barba, Oriol (2021)
      Conference lecture
      Open Access
      The present paper focuses on the large eddy simulation (LES) of the n-heptane and n-dodecane flames of the Cambridge swirl flames data repository (Sidey et al., 2017). The applied tabulated chemistry spray combustion model ...
    • Multi-physics methodology for phase change due to rapidly depressurised two-phase flows 

      Chávez Modena, Miguel; Runio, Gonzalo; Valero, Eusebio; Mira, Daniel; Lehmkuhl Barba, Oriol (Elsevier, 2021)
      Article
      Restricted access - publisher's policy
      Zonal modeling is a common technique for the numerical certification of fire-extinguishing systems, however it is not valid to simulate the complex physical phenomena that occurs near the agent injection. We present a ...
    • Numerical investigation of the burning characteristics of ventilation air methane in a combustion based mitigation system 

      Mira, Daniel; Cluff, Daniel L.; Jiang, Xi (Elsevier, 2014-10)
      Article
      Open Access
      Large-eddy simulation of the reacting flow field in a combustion-based mitigation system to reduce the emissions of methane contained in ventilation air methane is presented. The application is based on the preheating and ...
    • Parallel mesh partitioning based on space filling curves 

      Borrell, Ricard; Cajas García, Juan Carlos; Mira, Daniel; Taha, A.; Koric, S.; Vázquez, Mariano; Houzeaux, Guillaume (Elsevier, 2018-09)
      Article
      Open Access
      Larger supercomputers allow the simulation of more complex phenomena with increased accuracy. Eventually this requires finer and thus also larger geometric discretizations. In this context, and extrapolating to the Exascale ...
    • Parametric and model uncertainties induced by reduced order chemical mechanisms for biogas combustion 

      Freitas, Rodolfo S.M; Rochinha, Fernando A.; Mira, Daniel; Jiang, Xi (Elsevier, 2020)
      Article
      Restricted access - publisher's policy
      This study investigates the impact of chemical kinetic uncertainties on biogas combustion using a Uncertainty Quantification (UQ)-based methodology. The results indicate that the variation of physicochemical properties ...
    • Saiph, a domain specific language for computational fluid dynamics simulations 

      Macià, Sandra; Beltran Querol, Vicenç; Mira, Daniel; Mateo, Sergi (Barcelona Supercomputing Center, 2017-05-04)
      Open Access
      Nowadays, High-Performance Computing (HPC) is assuming an increasingly central role in scientific research while computer architectures are becoming more and more hetero-geneous and using different parallel programming ...
    • Saiph: towards a DSL for high-performance computational fluid dynamics 

      Macià, Sandra; Mateo, Sergi; Martínez-Ferrer, Pedro J.; Beltran Querol, Vicenç; Mira, Daniel; Ayguadé Parra, Eduard (Association for Computing Machinery (ACM), 2018)
      Conference report
      Restricted access - publisher's policy
      Nowadays high-performance computing is taking an increasingly central role in scientific research while computer architectures are becoming more heterogeneous and complex with different parallel programming models and ...
    • Study of the Wall Thermal Condition Effect in a Lean-Premixed Downscaled Can Combustor Using Large-Eddy Simulation 

      Mira, Daniel; Vázquez, Mariano; Houzeaux, Guillaume; Gövert, Simon; Kok, Jim W.B.; Mahiques, E.I.; Panek, Lukasz (American Society of Mechanical Engineers, 2016-06-13)
      Conference lecture
      Open Access
      The primary purpose of this study is to evaluate the ability of LES, with a turbulent combustion model based on steady flamelets, to predict the flame stabilization mechanisms in an industrial can combustor at full load ...
    • The combustion mitigation of methane as a non-CO2 greenhouse gas 

      Jian, X.; Mira, Daniel; Cluff, D.L. (Elsevier, 2018-05)
      Article
      Open Access
      Anthropogenic emissions of non-CO2 greenhouse gases such as fugitive methane contribute significantly to global warming. A review of fugitive methane combustion mitigation and utilisation technologies, which are primarily ...