Now showing items 1-19 of 19

    • 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
      Open Access
      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 statistical model for subgrid dispersion in large eddy simulations of particle-laden flows 

      Muela Castro, Jordi; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
      Conference report
      Open Access
      Dispersed multiphase turbulent flows are present in many industrial and commercial applications like internal combustion engines, turbofans, dispersion of contaminants, steam turbines, etc. Therefore, there is a clear interest ...
    • Assessment of numerical aspects using LES in particle separation devices 

      Muela Castro, Jordi; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio (European Conference for AeroSpace Sciences (EUCASS), 2019)
      Conference report
      Open Access
      Numerical simulations can be a powerful tool for the design and optimization of Foreign Object Debris (FOD) protection and separation devices. This work aims to study the relevance and influence of different modelling and ...
    • 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, ...
    • Comparison of Sliding Mesh and Immersed Boundary Methods in Unsteady Simulations 

      Vera i Fernández, Jordi; Muela Castro, Jordi; Favre, Federico; Oliet Casasayas, Carles (2021)
      Conference report
      Restricted access - publisher's policy
      The feasibility and accuracy of two methods for simulating moving bodies inside a fluid are studied. Different cases are presented using the Immersed Boundary Method and the Sliding Mesh technique. The results obtained by ...
    • Large eddy simulation of hydrogen autoignition in a preheated turbulent co-flow 

      Muela Castro, Jordi; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio; Ventosa Molina, Jordi (2013)
      Conference report
      Restricted access - publisher's policy
      The autoignition process of a hydrogen jet into a preheated turbulent air stream is numerically studied. A Progress-variable (PV) model with the turbulence-chemistry interactions modelled using a Presumed Conditional Moment ...
    • Modelling and numerical simulation of combustion and multi-phase flows using finite volume methods on unstructured meshes 

      Muela Castro, Jordi (Universitat Politècnica de Catalunya, 2018-04-11)
      Doctoral thesis
      Open Access
      The present thesis is devoted to the development and implementation of mathematical models and numerical methods in order to carry out computational simulations of complex heat and mass transfer phenomena. Several areas ...
    • New parallel method for adjacent disconnected unstructured 3D meshes 

      Muela Castro, Jordi; Martínez Valdivieso, Daniel; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2016-07-14)
      Article
      Open Access
      A new parallel method for simulations with non-overlapping disconnected mesh domains but adjacent boundaries is presented and studied. This technique allows simulations using 3D unstructured meshes that are independent.
    • New parallel method for adjacent disconnected unstructured 3D meshes 

      Muela Castro, Jordi; Martínez Valdivieso, Daniel; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2015)
      Conference report
      Restricted access - publisher's policy
      A new parallel method for simulations with non-overlapping disconnected mesh domains but adjacent boundaries is presented and studied. This technique allows simulations using 3D unstructured meshes that are independent.
    • Numerical analysis of conservative unstructured discretisations for low Mach flows 

      Ventosa Molina, Jordi; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Muela Castro, Jordi; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2016-12-01)
      Article
      Open Access
      Unstructured meshes allow easily representing complex geometries and to refine in regions of interest without adding control volumes in unnecessary regions. However, numerical schemes used on unstructured grids have to ...
    • On estimating the interface normal and curvature in PLIC-VOF approach for 3D arbitrary meshes 

      Amani, Ahmad; Muela Castro, Jordi; Schillaci, Eugenio; Castro González, Jesús (2022-01-03)
      Article
      Open Access
      Volume of fluid (VOF) method with its Piecewise Linear Interface Calculation (PLIC) reconstruction algorithm is one of the most popular approaches in numerical simulation of interfacial flows with a wide range of applications ...
    • On the Interpolation Problem for the Poisson Equation on Collocated Meshes 

      Santos Serrano, Daniel; Muela Castro, Jordi; Valle Marchante, Nicolás; Trias Miquel, Francesc Xavier (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
      Conference report
      Open Access
      The appearence of unphysical velocities in highly distorted meshes is a common problem in many simulations. In collocated meshes, this problem arises from the interpolation of the pressure gradient from faces to cells. ...
    • Regional aerosol deposition in the human airways: the SimInhale benchmark case and a critical assessment of in silico methods 

      Koullapis, P.; Kassinos, S.C.; Muela Castro, Jordi; Pérez Segarra, Carlos David; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Cui, Y.; Sommerfeld, M.; Elcner, J.; Jicha, M.; Saveljic, I.; Filipovic, N.; Lizal, F.; Nicolaou, L. (2017-09-07)
      Article
      Open Access
      Regional deposition effects are important in the pulmonary delivery of drugs intended for the topical treatment of respiratory ailments. They also play a critical role in the systemic delivery of drugs with limited lung ...
    • Regional aerosol deposition in the human airways: The SimInhale benchmark case and a critical assessment of in silico methods 

      Koullapis, P.; Kassinos, S.C.; Muela Castro, Jordi; Perez-Segarra, C.; Rigola, J.; Lehmkuhl Barba, Oriol; Cui, Y.; Sommerfeld, M.; Jicha, M.; Saveljic, I.; Filipovic, N.; Lizal, F.; Nicolaou, L. (Elsevier, 2018-02-15)
      Article
      Open Access
      Regional deposition effects are important in the pulmonary delivery of drugs intended for the topical treatment of respiratory ailments. They also play a critical role in the systemic delivery of drugs with limited lung ...
    • Simulació numèrica de fenòmens de transferència de calor en captadors concentradors parabòlics 

      Muela Castro, Jordi (Universitat Politècnica de Catalunya, 2012-04-01)
      Master thesis
      Restricted access - author's decision
      En la present memòria és mostra el desenvolupament d’una eina computacional destinada al càlcul i simulació de captadors solars parabòlics. El codi numèric generat està desenvolupat seguint el mètode dels volums finits i ...
    • Sistema de gestió i control equip laboratori 

      Muela Castro, Jordi (Universitat Politècnica de Catalunya, 2009-01-12)
      Master thesis (pre-Bologna period)
      Open Access
      El projecte té per objecte la gestió i control d’una bomba de calor utilitzada com equip de laboratori a l’EUETIB. El propòsit és garantir, de formà automàtica, unes condicions ambientals de temperatura i humitat al local ...
    • Study of stochastic models for subgrid dispersion in Lagrangian-Eulerian formulation 

      Muela Castro, Jordi; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Springer, 2018)
      Conference report
      Restricted access - publisher's policy
      Dispersed multiphase turbulent flows are present in many industrial and commercial applications like internal combustion engines, turbofans, dispersion of contaminants, steam turbines, etc. Therefore, there is a clear ...
    • Study of the autoignition of a hydrogen jet in a turbulent co-flow of heated air using LES modelling 

      Muela Castro, Jordi; Ventosa, Jordi; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2013)
      Conference report
      Restricted access - publisher's policy
      The autoignition process of a hydrogen jet into a preheated turbulent air stream is numerically studied. A Progress-variable model with the turbulence-chemistry interaction s modelled using a Presumed Conditional Moment ...
    • Study of the conservation properties in two-way coupled dispersed multiphase flows using finite volume methods 

      Bahramian, Linda; Muela Castro, Jordi; Pérez Segarra, Carlos David (Institute of Physics (IOP), 2021)
      Conference lecture
      Open Access
      In order to simulate dispersed multiphase flows, the coupling level must be determined according to the volume fraction in the system. The volume fraction is the ratio of the total volume of the dispersed phases over the ...