Now showing items 1-12 of 70

    • On the validation of numerical simulation with experimental results on compressible turbulent flow in an inertial particle separator device 

      Bahramian, Linda; Amani, Ahmad; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Pérez Segarra, Carlos David (Institute of Physics (IOP), 2024)
      Conference report
      Open Access
      To remove particles from entering the engine or Environmental Control System (ECS), an Inertial Particle Separator (IPS) can be situated in the intake. In IPS, a rapid change in flow direction is induced, and particles ...
    • Experimental and numerical pressure drop investigation of a protruding tube microchannel heat exchanger 

      Settati, Mohamed; Oliet Casasayas, Carles; Sanmartí Perona, Oriol; Oliva Llena, Asensio (Institute of Physics (IOP), 2024)
      Conference report
      Open Access
      An experimental and numerical fluid flow study in a micro heat exchanger (microHEX) is conducted in this work to investigate its pressure drop characteristics. The microHEX sample presents a high degree of protrusion of ...
    • A 3D symmetry-preserving simulation of a concentrated photovoltaic thermal (CPVT) solar collector 

      Santos Serrano, Daniel; Rigola Serrano, Joaquim; Castro González, Jesús; Trias Miquel, Francesc Xavier (Institute of Physics (IOP), 2024)
      Conference report
      Open Access
      In this work, a general collocated and unconditionally stable framework on unstructured meshes for solving Conjugate Heat Transfer (CHT) problems is presented by means of preserving the underlying symmetries of the continuous ...
    • Parametric study of structured thermocline storage systems 

      Vera i Fernández, Jordi; Sanmartí Perona, Oriol; Torras Ortiz, Santiago; Pérez Segarra, Carlos David (2022)
      Conference report
      Restricted access - publisher's policy
      A thermal accumulator system for concentrated solar power is modeled to perform a parametric study. The thermal accumulation system is a type of structured thermocline where there is a solid filler material with some ...
    • Optimized approach for CFD simulations of HVAC systems with grill air diffusers 

      Vera i Fernández, Jordi; Schillaci, Eugenio; Rigola Serrano, Joaquim; Oliet Casasayas, Carles (International Institute of Refrigeration, 2023)
      Conference report
      Restricted access - publisher's policy
      A proper CFD simulation of air distribution within a room requires the correct representation of inlet conditions from ventilation grids. Those elements are usually characterized by blades with a certain inclination angle ...
    • DNS and RANS simulations of a coil heat exchanger immersed in a tank 

      Vera i Fernández, Jordi; Torras Ortiz, Santiago; Schillaci, Eugenio; Oliva Llena, Asensio (Begell House, 2023)
      Conference lecture
      Restricted access - publisher's policy
      The operation of heat exchangers in a thermal system can be described by simple heat transfer equations. The heat exchange is normally defined by a global heat transfer coefficient, which takes into account internal and ...
    • Assessment of LES models for a fully developed windturbine array boundary layer 

      Folch Flórez, David; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (Begell House, 2023)
      Conference report
      Restricted access - confidentiality agreement
      Direct numerical simulations of the incompressible Navier-Stokes equations at high Reynolds numbers are not yet feasible, so dynamically less complex mathematical formulations such as Large Eddy Simulation (LES) have been ...
    • Strategies for increasing the arithmetic intensity on ensemble averaged parallel-in-time simulations 

      Plana Riu, Josep; Trias Miquel, Francesc Xavier; Alsalti Baldellou, Àdel; Oliva Llena, Asensio (Parallel Computational Fluid Dynamics (ParCFD), 2023)
      Conference report
      Restricted access - confidentiality agreement
      Extracting flow statistics from flow simulations requires generally long in- tegration intervals in which a good deal of the time is spent time-averaging the results. In order to avoid this, ensemble averaging can be applied ...
    • Combustion and air flows simulations of an industrial kiln for sanitary ware manufacture 

      Liu, Jiannan; Ruano Pérez, Jesús; Schillaci, Eugenio; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (Begell House, 2023)
      Conference lecture
      Restricted access - publisher's policy
      The implementation of green hydrogen as fuel in industrial kilns, such as those required in ceramic ware manufacturing processes, would be a disruptive milestone in the decarbonization process of the energyintensive industry. ...
    • Reliable overnight industrial LES: challenges and limitations. Application to CSP technologies 

      Alsalti Baldellou, Àdel; Colomer Rey, Guillem; Hopman, Johannes Arend; Álvarez Farré, Xavier; Gorobets, Andrei; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Conference report
      Open Access
      Preserving the operators’ symmetries at the discrete level is crucial to enable reliable DNS and LES simulations of turbulent flows. Moreover, real-world applications demand robust and stable numerical methods suitable for ...
    • On a conservative solution to checkerboarding: examining the causes of non-physical pressure modes 

      Hopman, Johannes Arend; Alsalti Baldellou, Àdel; Trias Miquel, Francesc Xavier; Oliva Llena, Asensio (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Conference report
      Open Access
      In computational fluid dynamics (CFD), the checkerboard problem remains a challenging issue when employing collocated grid arrangements for complex geometries. It manifests as oscillatory and non-physical pressure modes, ...
    • On a high-order energy-preserving unconditionally stable discretization on collocated unstructured grids 

      Santos Serrano, Daniel; Trias Miquel, Francesc Xavier; Verstappen, R.W.C.P.; Pérez Segarra, Carlos David (European Research Community on Flow, Turbulence, and Conbustion (ERCOFTAC), 2023)
      Conference report
      Open Access
      In this work, an energy-preserving unconditionally stable fractional step method on collocated unstructured grids is presented. Its formulation is based on preserving the underlying symmetries of the differential operators. ...