Exploració per tema "Natural convection"
Ara es mostren els items 1-11 de 11
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DNS and regularization modeling of a turbulent differentially heated cavity of aspect ratio 5
(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 ... -
Effect of using external vertical fins in phase change material modules for domestic hot water tanks
(2006-04)
Article
Accés obertThe effect of using external vertical fins in Phase Change Materials (PCM) modules to improve the natural convection coefficient in water is studied in this paper. The use of PCM in a water tank working with a solar system ... -
Film boiling heat transfer from micro heat sinks driven by Bénard-Marangoni convection
(2021-01-26)
Report de recerca
Accés obertBénard-Marangoni convection and its significance with regard to film boiling heat transfer from micro heat sinks is discussed. In recent works cooling performance of micro heat sinks has been studied showing that two-phase ... -
Large eddy and direct numerical simulations of a turbulent water-filled differentially heated cavity of aspect ratio 5
(2014-10-01)
Article
Accés obertNatural convection in a differentially heated cavity is characterized by different phenomena such as laminar to turbulent flow transition in the boundary layer, turbulent mixing, and thermal stratification in the core of ... -
Natural convection in a laterally heated cylindrical enclosure
(Universitat Politècnica de Catalunya, 2011-02-04)
Projecte Final de Màster Oficial
Accés obertA numerical study on the natural convection of small Prandtl number fluid in a cylindrical enclosure with lateral heating has been performed by a combination of second order time-splitting and pseudo –spectral methods. The ... -
Numerical simulations of conjugate convection combined with surface thermal radiation using an Immersed-Boundary Method
(Institute of Physics (IOP), 2016)
Text en actes de congrés
Accés obertDynamic and thermal interaction problems involving fluids and solids were studied through a finite volume based Navier-Stokes solver, combined with immersed-boundary techniques and the net radiation method. Source terms ... -
On the feasibility of affordable high-fidelity CFD simulations for indoor environment design and control
(2020-10-15)
Article
Accés obertComputational fluid dynamics (CFD) is a reliable tool for indoor environmental applications. However, accurate CFD simulations require large computational resources, whereas significant cost reduction can lead to unreliable ... -
Parameter-free symmetry-preserving regularization modeling of a turbulent differentially heated cavity
(2010-06-23)
Article
Accés restringit per política de l'editorialSince direct numerical simulations of buoyancy driven flows cannot be computed at high Rayleigh numbers, a dynamically less complex mathematical formulation is sought. In the quest for such a formulation, we consider ... -
Pseudoplastic fluid flows for different Prandtl numbers: steady and time-dependent solutions
(2019-11)
Article
Accés obertIn this work, a variational multiscale (VMS) finite element formulation is used to approximate numerically the natural convection in square cavity with differentially heated from sidewalls problem for Newtonian and power-law ... -
Study for the computational resolution of conservation equations of mass, momentum and energy. Benchmark solutions of heat transfer and fluid flow problems
(Universitat Politècnica de Catalunya, 2024-02-01)
Treball Final de Grau
Accés obertThis bachelor’s thesis focuses on the resolution of the mass, momentum and energy conservation equations through the resolution of several heat transfer and fluid flow benchmark problems. Its resolution is used as in ... -
Thermal effects of nonuniform heating in a nanofluid-filled annulus: Buoyant transport versus entropy generation
(Wiley, 2021-09-09)
Article
Accés obertThe primary challenge in the majority of heat transfer applications, in view of design perspective, is to maximize the thermal transport with the minimum generation of entropy. This paper addresses the numerical investigation ...