Browsing by Author "Chiva Segura, Jorge"
Now showing items 1-20 of 26
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Advanced CFD&HT numerical modeling of solar tower receivers
Colomer Rey, Guillem; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (Elsevier, 2013)
Conference report
Open AccessThis paper presents an advanced methodology for the detailed modeling of the heat transfer and fluid dynamics phenomena in solar tower receivers. It has been carried out in the framework of a more ambitious enterprise which ... -
An enhanced finite volume based solver for thermoelastic materials in fluid-structure coupled problems
González Acedo, Ignacio; Naseri, Alireza; Chiva Segura, Jorge; Rigola Serrano, Joaquim; Pérez Segarra, Carlos David (2018)
Conference report
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Characteristics of the near wake region behind a cylinder at critical and super-critical Reynolds numbers
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (Begell House, 2015)
Conference report
Restricted access - publisher's policyLarge-eddy simulations (LES) of the flow past a circular cylinder are used to investigate the characteristics of the near wake region at Reynolds numbers Re = 2.5 × 105 - 8.5 × 105. This range encompasses both the critical ... -
Coherent structures in a flow past a circular cylinder at critical and super-critical Reynolds numbers
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (Springer, 2015)
Conference report
Restricted access - publisher's policyIt is well known that the wake topology in the flow past a circular cylinder remains almost unchanged up to Reynolds number ~105 Williamson (Annu Rev Fluid Mech 28(1), 477–539 (1996)) [1]. Then, at Re~2×105 major changes ... -
Detailed numerical model for the receiver of a solar power tower plant
Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Oliva Llena, Asensio (2012)
Memorandum / Número de revista
Restricted access - publisher's policyIn this paper, a numerical model for the simulation of the receiver of a solar power tower plant is presented. This global model is composed of 4 specific sub-models (heat conduction, two-phase, thermal radiation and natural ... -
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)
Conference lecture
Restricted access - publisher's policyThis 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 of the turbulent natural convection flow in an open cavity of aspect ratio 4
Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Borrell Pol, Ricard; Oliva Llena, Asensio (Begell House, 2012)
Conference report
Open AccessIn this paper, three-dimensional turbulent natural convection heat transfer in an open cavity with an isothermal wall facing the overture has been studied. The aspect ratio chosen for the cavity has been 4 to complement the ... -
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)
Conference lecture
Restricted access - publisher's policyFlow 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 of falling droplets in a vertical channel
Balcázar Arciniega, Néstor; Castro González, Jesús; Chiva Segura, Jorge; Oliva Llena, Asensio (WIT Press, 2018-02-01)
Article
Open AccessThis paper presents Direct Numerical Simulation (DNS) of the falling motion of single and multiple deformable drops in a vertical channel. A systematic study of the wall effect on the motion of single drop is performed for ... -
Energy simulation of a single family dwelling with a modular object-oriented tool
Capdevila Paramio, Roser; Chiva Segura, Jorge; López Mas, Joan; Rigola Serrano, Joaquim; Lehmkuhl Barba, Oriol (2015)
Conference report
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Experimental evaluation of a pre-industrial air-cooled LiBr-H2O small capacity absorption machine
Farnós Baulenas, Joan; Castro González, Jesús; García-Rivera, Eduardo; Oliva Llena, Asensio; Chiva Segura, Jorge (2011)
Conference lecture
Open AccessThe paper studies thermal design and describes the experimental set-up of a domestic-scale prototype experimental cooling system based on a 7kW of nominal capacity single-stage small LiBr-H2O air-cooled absorption machine. ... -
LES-based study of the roughness effects on the wake of a circular cylinder from subcritical to transcritical Reynolds numbers
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (2017-10-27)
Article
Open AccessThis paper investigates the effects of surface roughness on the flow past a circular cylinder at subcritical to transcritical Reynolds numbers. Large eddy simulations of the flow for sand grain roughness of size k/D = 0.02 ... -
Low Mach Navier-Stokes equations on unstructured meshes
Ventosa Molina, Jordi; Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2012)
Conference report
Restricted access - publisher's policyNumerical methods for fluxes with strong density variations but with speeds much lower than the sound speed, known as low Mach flows, present some particularities with respect to incompressible formulations. Despite ... -
Modelization of heat transfer and fluid dynamics in solar power towers
Chiva Segura, Jorge; Lehmkuhl Barba, Oriol; Soria Guerrero, Manel; Oliva Llena, Asensio (2011)
Conference lecture
Open Access -
Modelization of the Low-Mach Navier Stokes equations in unstructured meshes
Chiva Segura, Jorge; Ventosa, Jordi; Lehmkuhl Barba, Oriol; Pérez Segarra, Carlos David (2011)
Conference lecture
Restricted access - publisher's policyIn this paper a Low-Mach number approximation of the Navier Stokes Equations in unstructured meshes is presented. Both staggered and collocated formulations for unstructured grids will be used.The aim is to develop a ... -
Numerical analysis of conservative unstructured discretisations for low Mach flows
Ventosa Molina, Jordi; Chiva Segura, Jorge; Lehmkuhl, Oriol; Muela Castro, Jordi; Pérez Segarra, Carlos David; Oliva Llena, Asensio (2016-12-01)
Article
Open AccessUnstructured 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 ... -
Numerical simulation of roughness effects on the flow past a circular cylinder
Rodríguez Pérez, Ivette María; Lehmkuhl, Oriol; Piomelli, Ugo; Chiva Segura, Jorge; Borrell, Ricard; Oliva Llena, Asensio (Institute of Physics (IOP), 2016)
Conference report
Open AccessIn the present work large eddy simulations of the flow past a rough cylinder are performed at a Reynolds number of Re = 4.2 × 105 and an equivalent sand-grain surface roughness height ks = 0.02D. In order to determine the ... -
On the flow past a circular cylinder from critical to super-critical Reynolds numbers: wake topology and vortex shedding
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell, Ricard; Oliva Llena, Asensio (2014)
Conference report
Open Access -
On the flow past a circular cylinder from critical to super-critical Reynolds numbers: Wake topology and vortex shedding
Rodríguez Pérez, Ivette María; Lehmkuhl Barba, Oriol; Chiva Segura, Jorge; Borrell Pol, Ricard; Oliva Llena, Asensio (2015-05-13)
Article
Open AccessLarge-eddy simulations (LES) of the flow past a circular cylinder are used to investigate the flow topology and the vortex shedding process at Reynolds numbers Re=2.5×105-8.5×105Re=2.5×105-8.5×105. This range encompasses ... -
On the large-eddy simulations of the flow past a cylinder at critical Reynolds numbers
Lehmkuhl Barba, Oriol; Rodríguez Pérez, Ivette María; Chiva Segura, Jorge; Borrell Pol, Ricard (Springer, 2013)
Conference report
Restricted access - publisher's policy