Exploració per autor "Pérez Segarra, Carlos David"
Ara es mostren els items 31-50 de 153
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Contrastación de diferentes criterios numéricos para la resolución de flujos potenciales mediante el empleo de coordenadas curvilíneas. Parte I: Función de corriente
Oliva, A.; Pérez Segarra, Carlos David; Costa, M. (Centro Internacional de Métodos Numéricos en Ingeniería, 1990)
Article
Accés obertEn este trabajo se analizan y contrastan diferentes criterios numéricos para la resolución de flujos potenciales subsónicos compresibles mediante el empleo de la función de corriente. Los dominios son discretizados en base ... -
Cost-vs-accuracy analysis of self-adaptive time-integration methods
Plana Riu, Josep; Trias Miquel, Francesc Xavier; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Begell House, 2023)
Text en actes de congrés
Accés restringit per política de l'editorialThe integration in time of the semi-discrete Navier-Stokes equations has been historically bounded by the classic CFL condition, and later on, an innovative method has been defined by ensuring the eigenvalues of the method ... -
Criterios numéricos en la resolución de la transferencia de calor en fenómenos de convección
Pérez Segarra, Carlos David (Universitat Politècnica de Catalunya, 1988-02-18)
Tesi
Accés obertLa finalidad de esta tesis es la obtención de las distribuciones de velocidades, presiones y temperaturas en la convección forzada de flujos compresibles en situaciones bidimensionales y de estabilización. Es a partir de ... -
Detailed analysis of fin-and-tube evaporators
Oliet Casasayas, Carles; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2009-09-17)
Comunicació de congrés
Accés restringit per política de l'editorialThis paper is devoted to the presentation of a new model for fin-and-tube evaporators, focusing on the solid core simulation and its integration with a quasi-homogeneous two-phase flow model for the in-tube refrigerant ... -
Detailed numerical model for the resolution of molten salt storage tanks for CSP plants
Pérez Segarra, Carlos David; Rodríguez Pérez, Ivette María; Oliva Llena, Asensio; Torras Ortiz, Santiago; Lehmkuhl Barba, Oriol (2012)
Text en actes de congrés
Accés obertConsidering the state-of-the-art in TES technologies, two-tank indirect system using molten salt is the most widespread within CSP plants. However, current techniques for design and optimization, as well as, for assessing ... -
Detailed numerical study of turbulent flows in air curtains
Jaramillo Ibarra, Julian Ernesto; Pérez Segarra, Carlos David; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2010)
Comunicació de congrés
Accés restringit per política de l'editorialAir curtains are generally a set of vertical or horizontal plane jets used as ambient separator. In order to prevent entrainment, a good air curtain should provide a jet with low turbulence level, enough momentum to ... -
Detailed prediction of fluid-solid coupled phenomena of turbulent flow through reed valves
González Acedo, Ignacio; Naseri, Alireza; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David; Oliva Llena, Asensio (Institute of Physics (IOP), 2019)
Text en actes de congrés
Accés obertThe operation of self-actuated valves in suction and discharge processes plays a crucial role in the thermal efficiency and structural reliability of hermetic reciprocating compressors. The present work provides a thorough ... -
Development and comparison of different spatial numerical schemes for the radiative transfer equation resolution using three-dimensional unstructured meshes.
Capdevila Paramio, Roser; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2009)
Comunicació de congrés
Accés restringit per política de l'editorial -
Development of a high accurate numerical platform for the thermal and optical optimization of linear Fresnel receivers
Guadamud Anchundia, Erick Alejandro; Chiva Segura, Jorge; Colomer Rey, Guillem; Farnós Baulenas, Joan; Al Mers, Ahmed; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (International Solar Energy Society, 2017)
Comunicació de congrés
Accés restringit per política de l'editorialThis paper represents an advanced methodology for the detailed modeling of the heat transfer and fluids dynamics phenomena in Linear Fresnel receivers. The present work aims at modeling Linear Fresnel elements (e.g. ... -
Direct numerical simulation and Large-Eddy simulations of the turbulent flow around a NACA-0012 airfoil
Lehmkuhl Barba, Oriol; Baez Vidal, Aleix; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David (2011)
Text en actes de congrés
Accés obertThis paper investigates the capabilities of two subgrid-scale (SGS) models for predicting the complex flow in transitional separated bubbles. We consider here the flow over a NACA 0012 airfoil at Reynolds number Re = 5×10 ... -
Direct Numerical Simulation of the flow over a sphere at Re = 3700
Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2009)
Comunicació de congrés
Accés restringit per política de l'editorialThe direct numerical simulation of the flow past a sphere at Re=3700 is presented. The computations are carried out with a parallel unstructured symmetry preserving information for accurate solving complex geometries. As ... -
Direct numerical simulation of the flow over a sphere at Re = 3700
Rodríguez Pérez, Ivette María; Borrell Pol, Ricard; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2011-05-19)
Article
Accés restringit per política de l'editorialThe direct numerical simulation of the flow over a sphere is performed. The computations are carried out in the sub-critical regime at Re = 3700 (based on the free-stream velocity and the sphere diameter). A parallel ... -
Direct Numerical Simulation of the turbulent flow around a NACA 0012 airfoil at different angles of attack
Baez Vidal, Aleix; Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Pérez Segarra, Carlos David (2011)
Text en actes de congrés
Accés obertDirect numerical simulations (DNS) of the flow dynamics over a NACA 0012 airfoil at Reynolds number Re = 5×104 at different angles of attack are presented. The dynamic of the large separation bubble, characterised by laminar ... -
Direct numerical simulation of turbulent wakes: flow past a sphere at Re=5000
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2010)
Text en actes de congrés
Accés obertThe flow around bluff bodies is of great interest for a large number of engineering applications such as vehicle aerodynamics, cooling devices using forced convection, heat transfer enhancement using droplets, among ... -
Direct numerical simulation of viscoplastic-type non-Newtonian fluid flows in stenosed arteries
Carmona Muñoz, Ángel; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2013)
Text en actes de congrés
Accés restringit per política de l'editorialThe aim of this work is to provide DNS solutions for turbulence flows of viscoplastic-type non-Newtonian fluids and thus contribute to gain insight into the underlying physics of the non-Newtonian turbulent flows. This ... -
Direct numerical simulations and symmetry preserving regularization simulations of the flow over a circular cylinder at Reynolds number 3900
Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Pérez Segarra, Carlos David; Chiva Segura, Jorge; Oliva Llena, Asensio (2009-09-14)
Comunicació de congrés
Accés restringit per política de l'editorialFlow around cylindrical structures is of relevance for many practical applications. Knowledge of flow-related unsteady loading of such structures is crucial for hydro - and aerodynamic control and design. Recenty, the ... -
DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5
Trias Miquel, Francesc Xavier; Gorobets, Andrei; Oliva Llena, Asensio; Pérez Segarra, Carlos David (2013-01-15)
Article
Accés obertThis work is devoted to the study of turbulent natural convection flows in differentially heated cavities. The adopted configuration corresponds to an airfilled (Pr = 0.7) cavity of aspect ratio 5 and Rayleigh number Ra ... -
Dynamic simulation of indirect air conditioning systems with optimized computational time
Ablanque Mejía, Nicolás; Torras Ortiz, Santiago; Oliet Casasayas, Carles; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (2019)
Text en actes de congrés
Accés obert -
Effect of hydrogen addition to methane-air jet flame based on Sandia flame D
Liu, Jinglong; Pérez Segarra, Carlos David; Rigola Serrano, Joaquim; Trias Miquel, Francesc Xavier (Scipedia, 2022)
Text en actes de congrés
Accés obertThe present study investigates the effect of hydrogen addition to methane-air jet flame based on Sandia flame D. For this purpose, RANS simulations with a global four-step mechanism were first compared with other reduced ... -
Energy efficiency in buildings: dynamic numerical simulation and application to retroffiting edification
Rigola Serrano, Joaquim; Capdevila Paramio, Roser; López Mas, Joan; Kizildag, Deniz; Castro González, Jesús; Pérez Segarra, Carlos David (2016-11-24)
Report de recerca
Accés obert