Ara es mostren els items 71-90 de 167

    • Gravity-driven motion of a swarm of bubbles in a vertical pipe 

      Balcázar Arciniega, Néstor; Lehmkuhl Barba, Oriol; Castro González, Jesús; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2015)
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      In this work, Direct Numerical Simulations of gravity-driven motion of a swarm of bubbles in a vertical pipe are presented. These simulations were carried out in the contex of a multiple marker level-set methodology, which ...
    • Heat Exchanger Surrogates for a Vapor Compression System 

      Loka, Nasrulloh Ratu Bagus Satrio; Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Gurumurthy, Sriram; Monti, A.; Rigola Serrano, Joaquim; Oliet Casasayas, Carles; Couckuyt, Ivo; Dhaene, Tom (Linköping University, 2023)
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      Given the computationally intensive nature of heat exchanger simulators, utilizing a data-driven surrogate model for efficiently computing the heat exchanger outputs is desirable. This study focuses on developing integrated ...
    • Heat exchangers modelling and calibration for complete ECS architectures simulations 

      Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim (European Conference for AeroSpace Sciences (EUCASS), 2022)
      Comunicació de congrés
      Accés obert
      The aeronautical industry is currently designing new Environmental Control System (ECS) architectures based on the More Electrical Aircraft (MEA) concept in order to improve the energy consumption efficiency inside commercial ...
    • High-order cell-centered finite volume method for solid dynamics on unstructured meshes 

      Castrillo Green, Pablo; Schillaci, Eugenio; Rigola Serrano, Joaquim (Elsevier, 2024-05-01)
      Article
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      This paper introduces a high-order finite volume method for solving solid dynamics problems on three-dimensional unstructured meshes. The method is based on truncated Taylor series constructed about each control volume ...
    • High-order finite volume method for linear elasticity on unstructured meshes 

      Castrillo Green, Pablo; Canelas, Alfredo; Schillaci, Eugenio; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2022-08-01)
      Article
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      This paper presents a high-order finite volume method for solving linear elasticity problems on two-dimensional unstructured meshes. The method is designed to increase the effectiveness of finite volume methods in solving ...
    • Hot run test results of a validation optimized water-ice phase change heat accumulator and comparison to numerical analysis¿X¿¿c 

      Riccius, Jorg; Leiner, Johannes; Castro González, Jesús; Rigola Serrano, Joaquim (2013)
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      Phase change heat accumulators are essential devices for the thermal management of multiple ignition, electric pump driven in-space propulsion systems such as the Low Cost Cryogenic Propulsion (LCCP) system [1], [2]. For ...
    • Hygrothermal analysis of characteristic public building rooms before energy efficient retrofitting solutions 

      Souaihi, Oussama; Capdevila, Roser; Lopez, Joan; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim (International Building Performance Simulation Association (IBPSA), 2016)
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      In the present paper, a modular, object-oriented and parallel methodology for the multiphysics simulation of buildings is presented. The whole building is modeled as a collection of basic elements (e.g., walls, rooms, ...
    • Introduction of CFD&HT analysis into an object oriented one dimensional and transient program for numerically simulate hermetic refrigeration compressors 

      López Mas, Joan; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2010)
      Comunicació de congrés
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      The present paper is a coupling between a modular object oriented one-dimensional and transient numerical simulation model for the thermal and fluid dynamic analysis of compressor behavior and CFD&HT code over the circulating ...
    • Large eddy simulation model assessment of the turbulent flow through dynamic compressor valves 

      Estruch Pérez, Olga; Lehmkuhl Barba, Oriol; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013)
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      The present paper attempts the dynamic simulation of the fluid flow through the valve reed taking into account valve movement due to piston displacement. This work widens previous studies based on numerical experiments ...
    • Manual de pràctiques de laboratori de Termodinàmica (v1) 

      Torras Ortiz, Santiago; Ablanque Mejía, Nicolás; Román Concha, Frida Rosario; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Calventus Solé, Yolanda (Universitat Politècnica de Catalunya, 2023)
      Exercici de pràctiques
      Accés obert
    • Mathematical Modeling and Experimental Validation of a Highly Efficient Flat Plate Solar Collector with compound Transparent Insulation Materials including a Silica Layer 

      Febrer Cordoba, Rafael; Castro González, Jesús; Zheng, Jian; Rigola Serrano, Joaquim; Oliva Llena, Asensio; Kizildag, Deniz (International Society of Exposure Science (ISES), 2021)
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      The present work consists in the development of a highly efficient solar thermal flat plate solar collector [FPC] with transparent insulation materials [TIM] at high-temperature ranges (¿ at ¿T/G close to 0.1 Km2/W). The ...
    • Minimization procedure of experimental tests for calibration purposes, within HVAC&R energy efficiency framework 

      Morales Ruíz, Sergio; Oliet Casasayas, Carles; Castro González, Jesús; Rigola Serrano, Joaquim; Oliva Llena, Asensio (2019)
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      Simulation models and predictive tools need to be fast, accurate and robust at the same time. The models that have to provide numerical solutions under transient conditions for a long period of time need to be simple with ...
    • Modelling and experimental validation of the heat accumulator in a Low Trust Cryogenic Propulsion (LTCP) system¿¿e, 

      Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales, Sergio; Riccius, Jorg; Leiner, Johannes (2013)
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      The study of one of the components, the heat accumulator, of Low Thrust Cryogenic Propulsion systems (LTCP), is of scientific interest in the framework of ISP-1 project [1]. This device stores thermal energy from the fuel ...
    • Modular simulation of vapour compression systems with an object oriented tool 

      Ablanque Mejía, Nicolás; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2013)
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      The objective of this work is to simulate vapour compression refrigeration systems through a modular approach by means of an object - oriented numerical tool called NEST. For this purpose, the global system is modeled as ...
    • Multi-layered solid-PCM thermocline thermal storage concept for CSP plants. Numerical analysis and perspectives 

      Galione Klot, Pedro Andrés; Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio; Rigola Serrano, Joaquim (2015-03-15)
      Article
      Accés obert
      Thermocline storage concept has been considered for more than a decade as a possible solution to reduce the huge cost of the storage system in concentrated solar power (CSP) plants. However, one of the drawbacks of this ...
    • Multi-layered solid-PCM thermocline thermal storage for CSP. Numerical evaluation of its application in a 50 MWe plant 

      Galione Klot, Pedro Andrés; Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Torras Ortiz, Santiago; Rigola Serrano, Joaquim (2015-09-01)
      Article
      Accés obert
      Thermocline storage concept is considered as a possible solution to reduce the cost of thermal storage in concentrated solar power (CSP) plants. Recently, a multi-layered solid-PCM (MLSPCM) concept—consisting of a ...
    • Multiphysics modeling and experimental validation of low temperature accumulator for cryogenic space propulsion systems 

      Torras Ortiz, Santiago; Castro González, Jesús; Rigola Serrano, Joaquim; Morales Ruíz, Sergio; Riccius, Jorg; Leiner, Johannes (2019-01-01)
      Article
      Accés restringit per política de l'editorial
      Within the framework of Low Thrust Cryogenic Propulsion (LTCP) systems, a low-temperature accumulator acting as thermal energy storage tank is an interesting option for cyclical processes under intermittent firings avoiding ...
    • Numerical analysis of no-frost domestic refrigerator evaporators 

      Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio; Rigola Serrano, Joaquim (2011)
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      The air-to-refrigerant evaporator placed in no-frost refrigerators is a critical component because of its simultaneous treatment of both cooler and freezer air streams, which implies a strong drying process on the cooler ...
    • Numerical analysis of suction mufflers 

      Rigola Serrano, Joaquim; López Mas, Joan; Papakokkinos, Giorgos; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Purdue University, 2014)
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      The aim of this paper is to present the numerical resolution of suction muffler configurations (by means of a tridimensional, unstructured, parallel and object oriented CFD&HT TermoFluids code (Lehmkuhl, et al. 2007) ...
    • Numerical analysis of the turbulent fluid flow through valves. Geometrical aspects influence at different positions 

      Rigola Serrano, Joaquim; Aljure Osorio, David E.; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2015)
      Comunicació de congrés
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      The aim of this paper is to carry out a group of numerical experiments over the fluid flow through a valve reed, using the CFD&HT code TermoFluids, an unstructured and parallel object-oriented CFD code for accurate and ...